precision truck trainingtmitraining.com/booksample/tmichevyp1ebksample.pdf · gawr, gvwr and...

PrecisionTruck

Training

Course IChevrolet light trUCKs

By James e. godfreyand robert J. godfrey

FoUrteenth edition — JanUary, 2019

Truck Marketing InstituteDistance Training Courses in Truck Selection & Application

Technical & Product Trainingfor the Chevrolet Truck Specialist

FirstEdition – 1999SecondEdition – 2001ThirdEdition – 2001FourthEdition – 2002FifthEdition–2004SixthEdition–2007SeventhEdition–2007EighthEdition–2009NinthEdition–2010TenthEdition–2014EleventhEdition–2016TwelfthEdition–2017ThirteenthEdition–2018FourteenthEdition–2019

previously published as

Precision Truck SellingCourse I

Chevrolet Light Trucks

Copyright © 1999,2001,2002,2004,2007,2009,2010,2014,2016,2017,2018,2019

byTruck Marketing Institute1090EugeniaPlace(Suite101)Carpinteria,California93013-2011Phone:1-805-684-4558Fax:1-805-684-2868Web:http://www.TMItraining.com

ChevroletLightTrucks PrecisionTruckTraining TMI

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ForewordIt is exciting to know that you have taken a step into the world of light duty trucks with your enrollment in Precision Truck Training: Course I.

This is a short, five lesson correspondence course written by professionals who want you to be comfortable when you talk trucks with your custom-ers. When you finish, you’ll know the Chevrolet model line, the basics of distributing loads on trucks, important truck terms, and where to find information in your product specifications sources.

It doesn’t matter if you make a living selling trucks or work for a leas-ing company or fleet that is buying them. This course is designed for the beginner who thinks the term “fifthwheel” means a spare tire.

Please start right now by finishing the introductory section. It contains good information on what the course is, how to study and submit tests, and what the standards are for receiving a Certificate that can be framed for your wall!

The investment you make now with this course gives you knowledge to last a lifetime! Welcome to Precision Truck Training: Course I and good luck as you move through each of the five lessons.

Sincerely yours,

Robert J. Godfrey Director

PS: When you finish the course, please complete the short questionnaire at the end of the Introduction section (pages 15-16). Your opinions are important and help us design better training courses!

TMI PrecisionTruckTraining ChevroletLightTrucks

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Contents Introduction 3 Foreword 4-5 Contents 7 PrecisionTruckTraining:Why? 7 SummaryofLessons 8 TruckMarketingInstitute:MissionStatement 9 HowtoStudyEffectively 10 SchoolSchedule 11 TakingtheTests 11 GradingPolicy.WhatisaGoodScore? 12 SixMonthEnrollmentTerm 12 EmployerFollow-Up 12 ToMailortoFax? 13 GroupStudyPolicy 14 ScoreCard 15 CourseEvaluationSurvey 17 ReferenceSourceTutorials

Lesson:1 21 LessonObjectives 22 TheLightTruckMarket 23 TruckSizeCategories 27 IncompleteorSpecialModels 28 ChassisDriveTypes 29 “JustGiveMeaHalf-TonTruck!” 29 TheChevroletModelCodeSystem 31 ProductStudies:Lesson1 31 ChevroletTrucks:AProfile

Lesson:2 33 LessonObjectives 34 PreferredEquipmentGroups(U.S.) 34 Select-a-UnitOrdering(Canada) 34 Interior / ExteriorTrim 35 OptionalEquipment 35 TruckWeightRatings 37 CurbWeightInformation 37 CalculatingEquippedCurbWeights 38 PayloadWeightCalculations 39 WhatAboutOccupantWeights? 39 BasicTruckDimensions 40 ElectricalSystemsBasics 41 ProductStudies:Lesson2

Page � Introduction


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Lesson:3 43 LessonObjectives 43 TruckWeightDistribution 49 UnderstandingLoadCapacity 49 FrameStrength 52 FrameDesignFactors 53 AxlesandAxleSystems 54 RearAxleInformation 56 SpringsandSpringRatings 56 ShockAbsorbersandStabilizerBars 57 TiresandWheels 57 RadialversusBiasPlyConstruction 58 TireTreadDesigns 58 TireLoadRatings 59 TireSizesandDimensions 60 BrakeSystems 61 GrossAxleWeightRatings 61 ProductStudies:Lesson3 62 FYI:EquipmentAdd-OnWeights

Lesson:4 63 LessonObjectives 64 TruckOwners:ThePerformanceX-Factor 64 IntroductiontoLightTruckEngines 65 AlternateFuelVehicles(AFV):TheBasics 66 FuelInjectionversusCarburetion 66 DirectInjectionforGasolineEngines 66 NaturallyAspiratedversusTurbocharged 67 DieselversusGasolineTypes 67 BacktoBasics:Torque 68 EnginePowerDependsonTorque 70 AxleRatiosandPerformance 71 LowversusHighAxleRatios 73 ManualTransmissions 73 AutomaticTransmissions 74 Power:WhereDoesitGo? 76 TruckPerformance:TrailerTowing 80 HarnessingtheHorsepower 81 ThePowerRobbers:HeatandAltitude 82 ProductStudies:Lesson4

Page �


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Introduction

Lesson:5 83 LessonObjectives 83 SportUtilities:AnotherLook 84 4x4Basics 85 AllWheelDrive 85 PTO:WhatisIt? 85 LockingHubsandDifferentials 86 TraileringwithTrucks 86 GVW,GTWandGCW 87 TrailerTongueWeightDistribution 87 LoadDistribution:DeadWeightHitch 88 WeightDistributingHitches 90 TheFiveTrailerandHitchClasses 90 WhatAboutTowingCapacity? 91 TraileringPowerDemands 91 FifthWheelTrailerHitches 92 TowingFifthWheelers:GrossWeightFactors 93 DieselEngines:PowerforToughJobs 94 TheCleanestDieselsEver 94 Diesels:TheyDon’tPerformMiracles 94 HowMuchWillaDieselSave? 95 VocationsforDieselPower 96 ProductStudies:Lesson5

Appendix 97–108 Tables&Data

Index 109–112

Page � Introduction


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IntroductionPrecision Truck Training: Why?Whether you sell trucks or operate trucks for a living, you will be more successful if you can listen to your customers, find out what their needs are, and then give them choices that reflect your profes-sional experience. Helping to establish your credibility as a truck professional is the objective of Precision Truck Training: Course I. By completing this course, you will find that your confidence has increased because you’ve got a good dose of truck fundamentals filed away for use when you need it. The light truck market is huge and the buyers are many and dif-ferent. Overall, however, they buy trucks because they perceive trucks will do something for them that cars can’t. Selling with “precision” means that YOU can recommend the right truck for the right buyer, the first time, and every time!

Summary of LessonsThe objective of Precision Truck Training: Course I is summarized by the previous paragraph. To achieve that overall objective, we have split the course into five lessons, covering a variety of subjects, each with their own objectives. Here is a summary of what each lesson is about.

Lesson1. Understanding the light truck market. Why is there value in trucks? What are the basic truck model types and where do Chev-rolet models fit in. What does the GM model code system mean? Do “ton ratings” mean anything? What’s a 4x4, 4x2 or an AWD? Getting acquainted with your product source.


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Lesson2. Know your product specifications sources. Why are GAWR, GVWR and payload capacities important. How to find chas-sis weights and calculate payloads. What are Preferred Equipment Groups? What do the truck dimensions mean?

Lesson3. How to distribute payloads to the front and rear axles. What are the important frame types and ratings? What are the differ-ent types of front and rear axles and their suspensions? How are axle weight ratings calculated and why are they important? What are the different types of tires and how much can they carry.

Lesson4. Describe the basic types of engines used and the different fuels they operate on. What is a turbocharger? Explain the difference between torque and horsepower and be able to figure how much power is needed. How do axle ratios affect performance? How to express performance in gradeability terms.

Lesson5. Explain the uses for the Suburban and Tahoe models. What is a 4x4 and how does it compare to all wheel drive? What do the trailering terms GCW, GTW, and tongue weight mean? What are load distributing and ball hitches? Do you know where to find recreational vehicle information? What are the markets for diesel fueled engines and how fast can the extra investment pay off?

Truck Marketing Institute: Mission StatementTruck Marketing Institute was founded in 1964 to write specialized training courses for those who sell and operate trucks. Our mission is to deliver up-to-date training programs that will substantially increase the sales engineering skills of not only truck sales representatives, but also those personnel in related fields of fleet purchasing, finance, leas-ing and operations. You can be assured that we meet and exceed distance education “best practices” of: Qualified faculty and staff. Careful admission screening. Reasonable tuition. Courses that have educational value. Honest advertising practices. A fair tuition refund policy. A history of student success and satisfaction. Financial stability to assure a quality educational service.

Introduction


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This course is compatible with product sources: GM AutoBook Pro, GM AutoBook (Canada), Carbook Fleet, and the Online Order Guide. Following is a brief guide on using these different sources. Some are password protected so make sure you get that needed in-formation from your company! You will need at least one of them for product information when completing your tests. There may be times we will direct you to the Online Order Guide specifically, when we know certain data is not yet available in the other sources.

Using the Different Product Reference SourcesOur focus here is how to use each of these to complete our lessons and tests, and is not meant to replace any software training your company may provide to you. Find your source below and follow along with our mini-tutorial.

GMAutoBookProbyChromeDataLogonto:https://carbookpro.carbook.com/dashboards/brands/gmab/login.jspEnter username, then your (case sensitive) password.

n Ifyouorsomeonewithyoursameusernameandpasswordhasre-searchedanyvehiclesherebefore,youcangotothe“tab”Build A Ve-hicle,andthelastvehicleresearchedwillcomeup.YoucandeletepastvehiclesfromappearingbyclickingonthetabManage Vehicle Listandselectingthoseyouwantdeleted.

n tostartwithanewvehiclesearch,clickontheblueBuILDVEhICLEbutton.(Don’tconfusethiswiththeBuild A Vehicletabwhichisabitloweronthescreen.)Select A VehiclewindowwillappearwhereyouwillselecttheMode(retailorFleet),theModelYear,theMake(listedalphabetically),andtheModel.

n Fordemonstrationpurposes,selectretail,2019,ChevyPickups,andSilverado2500hD.

n Fromthemodellistthatappears,abouthalf-waydown,double-clickonmodelcodeCC25943,2WDCrewCab167.7”.

n Afterdouble-clickingonthemodelcode,PreferredEquipmentGroupsandwhattheyeachincludewillappear,alongwithpricing.

n ClickontheblueSELECtbuttonunder1LT,LTandupcomesalistofincludedequipmentforthatpackage.Youwillseegreencheck-marks,redX’s,andothericonsinthestatuscolumnontheleft,aswellasequipmentcodes,andadescriptionoftheitemandcompatibilitynotes.AlegendoftheStatusIconsisatthebottomofthescreen.Youcanalsoscrolldownformoreinformation.

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Introduction


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LESSoN1Lesson ObjectivesThis is the place to start your foundation of knowledge about specing out light duty trucks and it really doesn’t matter if you’ve ever worked with trucks before! The objectives of this lesson are quite basic. You need to under-stand the size of the light truck market, know the different types of trucks, and understand Chevrolet’s offerings in this market place. By the time you have completed this lesson and worked through the open book test, you should have achieved these objectives: GainedaccesstoyourChevroletproductsource Understandhowtouseyoursource Befamiliarwiththesizeofthelighttruckmarket Identifythebasiccategoriesoftruckmodels MatchChevroletmodelswiththecategories HowtodecipheraGMmodelcodeforseries1500-3500 Explainwhytonratingshavelittlesignificance Tellthedifferencebetween2-wheel,4-wheel,andall-wheel-drive

Before reading any further, round up your source of Chevrolet product information and have it ready. It should be one of these: GM Auto-Book or GM AutoBook Pro, Chrome’s CarBook Fleet Edition or GM’s Online Order Guide. Some require usernames and passwords — gather that information if needed. We offer a mini-tutorial on using each of these at the end of our introduction section if you need a bit of assistance. Now, let’s get started!

The Light Truck Market In dealerships where cars and trucks are sold side-by-side, trucks may account for at least 50% of sales. Of course, in some parts of the coun-try, trucks outsell cars by a good margin. 2017 was an unprecedented year in light truck sales, with over 9.3 million units sold! Cross-over

Lesson One


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Truck Size CategoriesIf you look at the ranks of completed, ready to sell and use vehicles, there are seven industry accepted categories. We also have partially completed vehicles, which we will cover shortly. Here’s a breakdown of the different categories.

Fullsizepickups represent the largest traditional truck market. The Chevrolet Silverado is available in 1500, 2500, or 3500 series, two or four-wheel drive, varying cargo box lengths, with gas or diesel engines. Three choices of cab sizes ranging from 2-doors to 4-full size doors. The 2019 Silverado 1500 features a new frame, body and power-trains (the all-new Silverado HD will debut in the 2020 model year). A total of six engines are offered, including a turbocharged, 2.7-liter inline-four and a 3.0-liter diesel inline-six. Six-, eight- and ten-speed automatic transmissions are paired with the engines. The 5.3-liter and 6.2-liter V8s with Active Fuel Management (AFM) can switch between running on four or eight cylinders. There are also newer 5.3 and 6.2 V8s that use a Dynamic Fuel Management (DFM) system that deactivates a single cylinder, or various combina-tions of cylinders, to better optimize power and efficiency. The 1500 has a driver-selectable stop / start technology.

2019 Silverado1500 Crew Cab

1-1

Lesson OnePage 32


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Chevrolet Trucks: A ProfileHere is a quick reference table of the major Chevrolet truck models along with their size category and drive wheel types as discussed in Lesson 1. Note: The 4x2 / FWD category includes traditional rear wheel drive models as well as front wheel drive (FWD) models.

Chevrolet Drive Wheel Types Industry size andModel name 4x2/FWD 4x4 AWD Type CategoryColorado CompactpickupSilverado FullsizepickupExpress FullsizevanBlazer CrossoversportutilityEquinox CrossoversportutilityTraverse CrossoversportutilityTahoe FullsizesportutilitySuburban FullsizesportutilityTrax CrossoversportutilityBoltEV Crossoversportutility

OK now, you’ve studied a lot of material and deserve a short break. After you’ve completed your product studies and have reviewed the lesson material as needed, it’s time to complete your open book test for Lesson 1. Your tests are in the back pocket of this binder.

The textbook portion of this lesson ends here. Read or review the lesson as needed. Then, be sure you have studied the related Chevrolet Product references. After that, work the test and mail or fax it to 1-805-684-2868 for grading.


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LESSoN2Lesson ObjectivesMuch as Lesson 1 made you aware of the different types of Chevrolet trucks, this lesson will take you deeper into your product source in search of more detailed information. Here is a list of the objectives we have set forth in Lesson 2. Once you have read this lesson and have completed Test 2, you should have a clear understanding of:

Gettingtoknowyourproductsource WhatarePreferredEquipmentGroupsorSelect-A-UnitPackages SelectingInterior/Exteriortrim/paintColor WhatthetermsGVWandGVWRmean WhatismeantbythetermGAWR WhatareCurbWeights&wheretofindthem CalculatingEquippedCurbWeights Howtocalculatepayloadcapacity Accountingforoccupantweights Commonvehicledimensionsandabbreviations Electricalsystembasics

Get to Know Your Product SourceWe cannot stress enough how beneficial it is to you, as an up and coming truck professional, to know how to use your product source inside and out. So go into your source now and follow along. Helpful hint, always check the model year of your source if that is something you do not have to select each time you log in.

� Lesson Two


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Not many personal use buyers ask about payload capacity, but you better know what it is so you don’t sell a truck that ends up being overloaded constantly. For the commercial buyer who carries any kind of a load or needs to fit a body or special equipment, these ratings are all important. Remember, you’re supposed to be the expert!

GVW stands for Gross Vehicle Weight. Put simply, if your truck is put on a weigh scale and it weighs 6200 pounds, then your GVW is 6200 pounds. GVW is the weight of the vehicle consisting of the stan-dard truck weight, the add-on weights for options and equipment, the weight of the occupants, and whatever cargo is being carried.

2-1

GVWr, on the other hand, represents the manufacturer’s Gross Vehicle Weight Rating. Given the ratings of all of the load carrying components (tires, wheels, springs, frame, etc.) the GVWR is the manufacturer’s maximum allowed operating weight for the vehicle. Put another way, the GVW of the truck must not be more than the GVWR. The truck you recommend with a 5600-lb GVWR that hits the scales with a GVW of 8500-lbs is not a safe truck!

GAWr stands for the Gross Axle Weight Rating and is the maximum weight allowed on a given axle. If you see in your product source a truck with a front axle GAWR of 3100-lbs, then that truck is not to be operated with front axle loads over that limit. GAWR is determined by the weakest component of the axle sys-tem. If you had a 7500-lb axle fitted with 6000-lb springs, then the GAWR would be 6000-lbs (assuming tires and wheels of adequate ratings). In no case may the GVWR of the vehicle exceed the sum of the GAWRs. For many light trucks, the GVWR is less than the sum of GAWRs for safety purposes.


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LESSoN3Lesson ObjectivesIn Lesson 2, you gained insight into vehicle and axle weight ratings, as well as an understanding of payload ratings. Lesson 3 takes a dif-ferent approach as we look at the truck from a mechanical standpoint of what are the springs, axles, tires, wheels and brakes. We also get into distributing payloads and option weights using percentages. Completion of this lesson and the test will enable you to: Distributeweightsusingpercentages UseloadCGAstocalculatedistributionpercentages Comparethetermsyieldstrengthandsectionmodulus DefinethetermRBM Understandthedifferenttypesoffrontaxlesystems Explainthedifferencebetweensemi-floatingandfull-floatingaxles Interprettiresizesandloadratings Explainthebasicsofspringratings,shockabsorbersandstabilizers CalculateGAWRsbasedupongivencomponentratings

Truck Weight DistributionIt would be just as well if you have had no prior experience with the aspect of truck technology that we call weight distribution. All too often, this very elementary subject is approached with a mixture of witch doctor mumbo-jumbo and mind-bending arithmetic. At this point, clear your memory and start fresh! Just what is truck weight distribution? The clearest verbal defini-tion would be the sharing of weight by the front and rear axles of the vehicle. Trucks, cars, bicycles, little red wagons—they all conform to the same principles of weight proportioning to the axles.

Lesson Three Page ��


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Tires also come with “single” and “dual” use ratings. Single use means a rating for two tires per axle, while dual use is for those axles which use four tires. Tire makers give duals a lower rating per tire than singles for safety reasons. They believe that with crowned roads, a set of duals should not be counted on to carry as much weight as two widely spread tires on a front axle.

Tire Sizes and DimensionsMost light truck tires are metric sized and grouped into either “P-metric” or “LT-metric” types. The “P” type stands for passenger car based tires while the “LT” tires are light truck oriented tires. Here are two examples that illustrate the size designations for both the tire and the wheel. p255 / 70 R 17/sl SL:StandardLoad(XLExtraLoad) WheelDiameter:17inches Construction:RadialPly AspectRatio:70 SectionWidth:255 mm P-Metric (PassengerTypeTire)

lT265 / 70 R17/D LoadRange:D WheelDiameter:17inches Construction:RadialPly AspectRatio:70 SectionWidth:265 mm LT-Metric(LightTruckTire)

Are you curious about the term “aspect ratio” in the size designa-tions? Aspect ratio is the tire’s section height divided by its section width. Typical aspect ratios for truck tires range from 55 to 80. Aspect ratio is often called the “series” of tire. High performance applications will typically use a lower profile 45 or 50 series tire, which is much wider for its height. A lower profile tire will have a stiffer sidewall that results in better per-formance. A harsher ride and decreased load capacity are the downside of low profile tires.

➤SectionWidth

➤

➤

“70”Series

➤

Tire Aspect Ratio 3-1�

70%ofSectionWidth

SectionWidth

Tread

Shoulder

Carcass

Sidewall

BeadSeal

BeadSeat

Parts of the Tire 3-1�

Diameter


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LESSoN4Lesson ObjectivesAs you move through this course, we trust that you are developing a clear understanding of trucks in general and Chevrolet trucks in particular. In this lesson, we take a look at one more decision fac-tor for truck buyers, and that relates to how much performance the truck should have. Listening to what customers say about what they are looking for in a truck is a very important role for you, the truck professional. You need to be on the look out for the performance oriented buyer. Who is that? It could be the horse trailer puller, it might be the fire or rescue squad, or it just may be that average person looking for a passenger van. The customer who talks about going up hills, start-ing on grades, getting out of mud or sand, or pulling large loads is talking about performance. By working through this lesson and completing the test, you should be able to achieve the following objectives. KnowthebasictypesofenginesusedbyChevrolet Namefourtypesoffuelsforsparkignitedengines Explainwhataturbochargeris Tellthedifferencebetweentorqueandhorsepower Reviewtheautomatictransmissions Explainhowaxleratiosaffectperformanceandeconomy Calculatepowerdemandsforlight-dutytrucks Expressperformanceintermsofgradeability

In dealing with truck performance ability in Lesson 4, you will see that horsepower cares not whether it comes from gasoline or diesel fuel, and the same applies to torque output. This implies a hint that you may experience a diesel performance example. But that said, Lesson 5 will offer more about diesels and their uses.

Page ��Lesson Four


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OHV Overhead Valves, known also as valve-in-head design. A camshaft in the engine block actuates the single intake and exhaust valves through pushrods and rocker arms. An example is the 4.8L V8, having 16 valves.

SOHC A single overhead camshaft, mounted in the cylinder head, actuates single intake and exhaust valves.

DOHC Double overhead camshafts actuate twin intake and exhaust valves for each cylinder. For example, the 3.6L V6 engine has 24 valves—12 intake, 12 exhaust.

SFI Sequential Fuel Injection, having an injector at the intake port of each cylinder. Timing is electronically controlled. (A form of Multiport Fuel Injection— MFI.)

VVT Variable Valve Timing, also known as cam phasing, con-trols the opening and closing of the valves throughout the operating range, providing enhanced fuel efficiency.

AFM Active Fuel Management, a system designed to save fuel, but not compromise power when needed. Hydraulic valves combined with onboard software deactivate cylinders and switch between running on four or eight cylinders.

DFM Dynamic Fuel Management, cylinder deactivation system of hydraulic valves and onboard software capable of deactivat-ing a single cylinder, or various combinations of cylinders, to better optimize power and efficiency.

Alternative Fuel Vehicles (AFV): The BasicsIncreasingly, fleet managers in the U.S. are under pressure to order vehicles that can operate on fuels other than the traditional unleaded gasoline or diesel. The General Service Administration of the U.S. government is a large buyer of AFVs and they have provided a handy definitions guide of the three types of spark ignition AFVs, namely:

FLEXIBLEFuELVEhICLES (FFVs) have only one fuel tank. Flex-ible fuel vehicles are designed to operate on alcohol, gasoline or any combination of both. The vehicle’s fuel system automatically adjusts the engine, depending on what type of fuel or mixture is being used.

Lesson Four


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Does the higher numerical axle ratio multiply the available horse-power? The answer is a big NO! Horsepower cannot be multiplied, but it can be shifted by changing the engine operating speed at a given road speed. Of course, that assumes that the engine puts out more power with an increase in engine speed. That is typically the case for light truck engines.

Low versus High Axle RatiosIn selling light trucks, it is unlikely that you will need to calculate engine speeds, road speeds or required axle ratios. If you are interested in that data, or if you have a particularly tough customer, refer to Table 3 in the Appendix. At this point, what we want to do is establish a clear understanding of the effect of axle ratios on performance and economy. Contrast the roles of our 3.07 and 3.73 axle ratios.

A low numerical Ratio of 3.07 to 1: Isconsidered“fast”becauseroadspeedis relativelyfastforagivenenginerpm Willreduceenginerpmatagivenroadspeed Tendstoreduceenginepoweroutput Willreducevehiclestartingcapability Canresultinimprovedfueleconomy

A High numerical Ratio of 3.73 to 1:

Isconsidered“slow”becauseroadspeedisslowforagivenrpm Increasesenginespeedandpoweratagivenroadspeed Increasesoverallvehicleperformance,includingstartability Willtendtoresultinincreasedfuelconsumption

Performance TradeoffsSo which would be better for pulling a heavy camper? Would you recommend a smaller engine with a high axle ratio or would you go for the large displacement engine and a low axle ratio because it can develop its power at a lower rpm? Well, both solutions may be OK for your customer. Take a look at how the truck is going to be used. An ambulance constantly loaded to 10,000-lbs GVW running 25,000 miles a year is


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LESSoN5Lesson ObjectivesFour down and one lesson to go. You’re in the home stretch: Most of the heavy topics are behind you, so this lesson will focus on the specialty aspects of light trucks. We’ll take another look at SUVs, such as the Suburban and Tahoe. In that sense, anyone connected with trucks needs to have a clear understanding of 4x4s and 4-wheel drive systems, so that is ahead for your taking. Recreational truck uses is another specialty, so there is more to know about trailer towing. Diesel power is available in a broad range of Chevrolet light duty trucks of course. You will benefit from an understanding of diesel cost aspects along with the features and advantages of the Duramax V8 turbocharged diesel. Here is a summary of the lesson objectives: Knowyour4x4modelsand4x4drivesystems Differentiatewhichmodelsuse4x4orall-wheeldrive UnderstandGVW,GTWandGCWfortruckswithtrailers Determinegrossweightsfortruck-trailercombinations Beawareoftrailerandhitchclasses Knowthehitchtypes,includingfifthwheelers Understandthemarketsfordieselpoweredtrucks Knowtheavailabilityofdieselengines Calculatedieselcostsavingsandthepaybackperiod

Sport Utilities: Another LookChevrolet’s Suburban has been the longest running nameplate (since 1935) than any other vehicle in automotive history. It has a longer wheelbase and more room behind the third row of seats than the shorter Tahoe, introduced in 1994 from a re-badged / re-designed mid-size Blazer. These two full size sport utility vehicles remain popular choices in today’s market. Their versatility is second to none, with trailering packages, and multiple seating configurations, that can

Lesson Five Page 8�


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All Wheel DriveSome models can be ordered with an all wheel drive (AWD) system, which provide constant full time power to all the wheels. The power split is about 35% to the front, and 65% to the rear. Historically there was no controlling the AWD system. There is now a newer system, called Switchable All Wheel Drive that allows the driver to change between FWD (Front Wheel Drive) and AWD in inclement weather and/or terrain as needed. Check your model specs for availability. It may require a specific equipment package. This is a nice feature for occasional all wheel drive function, without having to go the full 4x4 route with a transfer case, or constant AWD function when not really needed. When not engaged, the vehicle will be more fuel-efficient in the FWD mode.

PTO: What is It?Don’t panic if the new truck buyer says “I need a PTO on my new truck.” Just be sure you understand what a PTO is and how you can provide for it. Put simply, PTO stands for “power take off,” which is a device to transmit power to operate equipment such as winches, pumps, hoists, etc. Mounted on the side of the transmission, the PTO is driven by a transmission gear. In turn, the output shaft of the PTO drives the auxiliary equipment. Not all transmissions can accommodate a PTO. The market for PTO driven devices is typically in truck models at 8600-lbs GVWR and higher. Currently, the Allison 1000 transmission will take SAE 6-bolt PTOs on the right hand (RH) and left hand (LH) sides. To help facilitate local installation of PTOs on the Silverado models, GM has created the option code PTO which provides the necessary controls to operate the PTO, wire provisions, a connector interface and PTO control software in the powertrain control mod-ule. This option is available on 3500 chassis cab models equipped with the Duramax 6.6-Litre diesel engine. Note: Even though the Allison transmission can accept RH or LH PTOs, the right side PTO is preferred for the heavier duty models.


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AppendixTABLES & DATA

AppendixPage 98 Table 1A: WeightsandMeasures

98 Table 1B: MetricEquivalents

99 Table 2: Tires:LoadandInflationData

100 Table 3:“P-Metric”Tire-AxleRatioCombinations

101 Table 4:LightTruckTire-AxleRatioCombinations

102 Table 5:RollingResistanceNetHorsepowerRequired

102 Table 6:FrontalAreasofLight-DutyTrucks

103 Table 7:AirResistanceNetHorsepowerRequired

103 Table 8:GradeNetHorsepowerRequired

104 Table 9:RoadSurfaceEffectsonPerformance

105-108 Glossary:LightTruckTerms

IndexPage 109-112 Index:AlphabeticalReferences


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Index

CCab-over 105Cabtoaxle(CA) 27, 28, 39, 49Carburetion 65, 106

vs fuel injection 66Cargoweight 49, 105Centerofgravity(CG) 44, 46, 47,

105Channelframe 50Chassiscab 27, 40, 44, 49, 55Chassisfriction 74Coilspring 56Compactpickup 24, 32Componentratings 44, 61Compressionignition 67Crewcab 23Crossoverutilityvehicle(CuV) 24Curbweight 37, 38, 48, 49, 106Cutaway 28

DDemandhorsepower 74, 75, 79Dieselengines 67, 93, 95

emissions 94Differential 55, 60, 86, 106Dimensions 28, 39, 50, 59Drivingfrontaxle 53, 54Dynamicfuelmanagement(DFM)

cylinder deactivation 23Dynamometers 68

AActivefuelmanagement(AFM)

cylinder deactivation 23Airresistance 74, 75, 78, 80, 103Allwheeldrive(AWD) 29, 32, 58,

60, 85Alternativefuelvehicles(AFV) 65

bi-fuel vehicles 66CNG (compressed natural

gas) 64–65dedicated vehicles 66E85 64–65flexible fuel vehicles (FFVs) 65LPG (liquefied petroleum

gas) 64–65Anti-lock 60Anti-skid 60Aspectratio 59Automatictransmission 72, 73Autotrac 84Axlerating 60Axleratios 55, 70, 71, 87Axlesystems 53

BBiasplytires 57, 74Bodycodes 30Boxframe 50Brakesystems 60Bumpertobackofcab(BBC) 39,

105

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