This is the original wiring diagram printed by GM for dealer mechanics. You can follow the wiring in your truck from bumper-to-bumper.

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It will help you to understand connector configurations, and locate & identify circuits, relays, and grounds. Although the schematic is in black and white, the color of each wire is noted.

You will not find this diagram in your shop manual. The schematic measures 8.5' x 11' when folded up, and opens up to 11' by 38'. The diagram pictured is an example of this type when folded, but is not the actual diagram for your vehicle.

Buy now for the best electrical repair info - the factory wiring diagram. 'Light Duty Truck C, K Models 1988 Service Manual' Written for GMC dealership mechanics, this factory-published original manual shows you how to work on your vehicle. With step-by-step instructions, clear pictures, exploded view illustrations, schematics, and specifications, you will have the information you need to get your project on the road and keep it there. This manual covers all mid-1987 and 1988 GMC C and K Sierra Pickup Truck models, including half ton, three-quarter ton, one ton, 1500, 2500, 3500, extended cab, dually, two wheel drive and four wheel drive.

Includes both gas and diesel engines. This manual covers the 'new style' C/K trucks for 1988, they do NOT have wing windows; this means that the C/Ks have one piece of glass in the door window. This factory information shows you how to repair your vehicle. With step-by-step instructions, clear pictures, exploded view illustrations, schematics, and specifications, you will have the information you need to get your project on the road and keep it there. See my other items for the separate overhaul manual.

Buy now to own the best shop manual for your GMC. Why buy a factory manual? Fix it right the first time with the factory repair manual and save money by doing the job yourself. Factory experts prepare these manuals for their dealership service departments, so they're the most complete and specific source of repair techniques. This is the original wiring diagram printed by GM for dealer mechanics. You can follow the wiring in your truck from bumper-to-bumper.

It will help you to understand connector configurations, and locate & identify circuits, relays, and grounds. Although the schematic is in black and white, the color of each wire is noted. You will not find this diagram in your shop manual. The schematic measures 8.5' x 11' when folded up, and opens up to 11' by 38'. The diagram pictured is an example of this type when folded, but is not the actual diagram for your vehicle.

Buy now for the best electrical repair info - the factory wiring diagram. This CD gives you assembly illustrations down to the last nut, bolt and screw. It shows exploded views of nearly every mechanical part of the truck, and includes part group numbers. Use this CD to help you disassemble or reassemble parts of your truck, and or to help identify parts that may be missing or incorrect. It contains production and regular production option information. That means that you get information on the base model all the way up to 'fully loaded.'

You will find illustrations for body assembly & mounting, frame, front & rear suspension, brakes, engine, transmission, fuel & exhaust, steering, wheels & tires, sheet metal, electrical, radiator & grille, bumpers, and much more. Written for GMC dealership mechanics, this factory-published original manual shows you how to work on your vehicle's electronic fuel & emissions controls for fuel injected gas engines. Learn to locate, test, troubleshoot, repair, or replace the sensors, valves, and electronic control modules.

This manual also cover driveability-how smoothly your engine starts, runs, and stops. You will learn to troubleshoot problems like hard start, rough idle, and dieseling. With step-by-step instructions, clear pictures, exploded view illustrations, schematics, and specifications, you will have the information you need to get your project on the road and keep it there. Buy now to own the best fuel and emissions manual for your vehicle. Some Chevy and GMC pickups came equipped from the factory with NapCo four wheel drive systems. This is an exact reproduction of the manual that was printed by NapCo for repair of four wheel drive units in GM pickups and trucks.

Find repair instructions here that you will see no where else – these units aren't covered in the Chevy or GMC factory manuals. You will find out how to work on the front axle, tie rod ends, brake adjustment, shoe removal, wheel cylinders, parking brake, and transfer case. Also includes operation and lubrication instructions. New condition. Buy now to own this unique book. This CD-ROM offers factory information that GM mechanics used to service C/K models. There is a set of 3 books on this CD.

With step-by-step instructions, clear pictures, exploded view illustrations, schematics, and specifications, you will have the information you need to get your project on the road and keep it there. This final edition set is complete in 3 volumes, and is more correct and revised than the grey early edition set. Volume 1 has 1,024 pages, volume 2 has 2,107 pages, and volume 3 has 1,821 pages. With the step-by-step illustrated instructions and specifications on this CD, you will have the information you need to get your project on the road and keep it there.

Great if you have a hard copy that you want to keep clean. We have manuals on paper also - see our other items. Buy now to own the best CD for your vehicle. This CD-ROM offers page-for-page reproductions of four bound manuals that GMC mechanics used to service trucks. It includes the: 970 page 1974 'X-7432 1974 GMC Truck Service Manual Light Duty Trucks Series 1500 Thru 3500 (Includes Jimmy, 'G', and 'P' Models)', the 534 page 1974 'X-7435 1974 GMC Light Duty Trucks (Series 1500 thru 3500) Overhaul Manual', the 297 page 1975 'X-7532 1975 GMC Truck Service Manual Supplement Light Duty Trucks Series 1500-3500 (Includes Jimmy, 'G' and 'P' Models)', and the 387 page 1976 'X-7632B 1976 GMC Truck Service and Overhaul Manual Supplement Light Duty Trucks Series 1500-3500 (Includes Jimmy, 'G' and 'P' Models)'.

Chevy Astro Van 2016

This CD-ROM offers factory information that GM mechanics used to service C/K models. It includes step-by-step instructions, clear pictures, exploded view illustrations, and color schematics for accessories, brakes, axles, driveline, electrical, engine, engine performance (trouble codes), heating, air conditioning, maintenance, restraints, steering, suspension, and transmission (it even includes transmission overhaul). You even get service bulletin updates. With the step-by-step illustrated instructions and specifications on this CD, you will have the information you need to get your project on the road and keep it there. Great if you have a hard copy that you want to keep clean. Buy now to own the best manuals for your vehicle on CD. We have manuals on paper also - see our other items.