This 1978 GMC Truck Unit Repair Manual is a high-quality, licensed, PRINT reproduction of the shop manual written and first published by the experts at the original equipment manufacturer (OEM), General Motors Corporation, for use by their dealership mechanics. Sometimes your classic GMC truck needs more than adjustments. Sometimes, major components need to be overhauled. Fortunately, that's exactly why this 424-page book was designed. It's the professional resource to use when rebuilding your air conditioning compressor, steering, rear axle, 4-wheel drive, brakes, automatic transmission, manual transmission, clutch and transfer case.

This unit repair manual, sometimes called an overhaul manual, covers the instructions for disassembly, refurbishment and reassembly of the major components and systems listed above. It is a wonderful complement to the 1978 GMC Truck Service Manual (Series 1500 thru 3500). The SERVICE manual covers diagnosis, adjustments, component removal/installation. We highly recommend owning both of these factory-written sources for thorough coverage.

Inside this guide, you'll discover a huge number and variety of visual aids which have been meticulously paired with descriptions and step-by-step, text instructions. The quality of the tables, charts, illustrations, black and white photographs and the other visual tools is outstanding. Please take a moment to scroll down and view a sample page which demonstrates the unrivaled clarity delivered by this layout.

The publisher, Detroit Iron, uses world-class, digital equipment to reproduce these manuals, retaining ALL of the original content. Then, they employ superior materials, such as thick paper to produce and deliver the best manuals on the market. You'll enjoy dark text and clear visuals on clean backgrounds.

MODELS COVERED:

• 1978 GMC C15 Truck
• 1978 GMC C15 Heavy Half Truck
• 1978 GMC C15 High Sierra Truck
• 1978 GMC C15 Sierra Classic Truck
• 1978 GMC C15 Sierra Grande Truck
• 1978 GMC C15 Street Coupe Truck
• 1978 GMC C15 Suburban Truck
• 1978 GMC C15 Suburban High Sierra Truck
• 1978 GMC C15 Suburban Sierra Classic Truck
• 1978 GMC C15 Suburban Sierra Grande Truck
• 1978 GMC C25 Truck
• 1978 GMC C25 High Sierra Truck
• 1978 GMC C25 Sierra Classic Truck
• 1978 GMC C25 Sierra Grande Truck
• 1978 GMC C25 Suburban Truck
• 1978 GMC C25 Suburban High Sierra Truck
• 1978 GMC C25 Suburban Sierra Classic Truck
• 1978 GMC C25 Suburban Sierra Grande Truck
• 1978 GMC C35 Truck
• 1978 GMC C35 High Sierra Truck
• 1978 GMC C35 Sierra Classic Truck
• 1978 GMC C35 Sierra Grande Truck
• 1978 GMC Caballero Truck
• 1978 GMC Caballero Diablo Truck
• 1978 GMC Caballero Laredo Truck
• 1978 GMC G15 Rally STX Van
• 1978 GMC G15 Rally Van
• 1978 GMC G15 Vandura Van
• 1978 GMC G25 Rally STX Van
• 1978 GMC G25 Rally Van
• 1978 GMC G25 Vandura Van
• 1978 GMC G35 Magna Van
• 1978 GMC G35 Rally Camper Special Van
• 1978 GMC G35 Rally STX Van
• 1978 GMC G35 Rally Van
• 1978 GMC G35 Vandura Special Van
• 1978 GMC G35 Vandura Van
• 1978 GMC Jimmy Truck
• 1978 GMC Jimmy High Sierra Truck
• 1978 GMC Jimmy Sierra Classic Truck
• 1978 GMC Jimmy Sierra Grande Truck
• 1978 GMC Jimmy Street Coupe Truck
• 1978 GMC K15 Truck
• 1978 GMC K15 High Sierra Truck
• 1978 GMC K15 Sierra Classic Truck
• 1978 GMC K15 Sierra Grande Truck
• 1978 GMC K15 Suburban Truck
• 1978 GMC K15 Suburban High Sierra Truck
• 1978 GMC K15 Suburban Sierra Classic Truck
• 1978 GMC K15 Suburban Sierra Grande Truck
• 1978 GMC K25 Truck
• 1978 GMC K25 High Sierra Truck
• 1978 GMC K25 Sierra Classic Truck
• 1978 GMC K25 Sierra Grande Truck
• 1978 GMC K25 Suburban Truck
• 1978 GMC K25 Suburban High Sierra Truck
• 1978 GMC K25 Suburban Sierra Classic Truck
• 1978 GMC K25 Suburban Sierra Grande Truck
• 1978 GMC K35 Truck
• 1978 GMC K35 High Sierra Truck
• 1978 GMC K35 Sierra Classic Truck
• 1978 GMC K35 Sierra Grande Truck
• 1978 GMC P15 Van
• 1978 GMC P15 Value Van
• 1978 GMC P25 Van
• 1978 GMC P25 Value Van
• 1978 GMC P35 Van
• 1978 GMC P35 Value Van

The Motor Bookstore has been servicing the do-it-yourself (DIY) mechanic crowd since 1997. We love being a part of keeping your beloved square body rolling down the road...or off of it!

The '78 GMC brochure urged you to, "Go truckin' in a GMC". They claimed to have a truck for "whatever suits your needs". When you look at the array of great vehicles they offered, from wideside models, fenderside models, bonus/crew cabs, the lovable Jimmy, to a host of others, they weren't kidding. Whichever vintage machine you're looking to overhaul, be sure you are prepared. That means having the information in your hands before you have any wrenches. This superior 1978 GMC Unit Repair (Overhaul) Manual is the comprehensive guide for getting the jobs completed accurately and efficiently.

This factory-written shop manual is perfect for service, repairs, restoration and rebuild projects. Clear illustrations and photos show exploded views, as well as component details, plus specifications, engine repair details, fuel systems and more.

Subject: 1978 GMC Truck Unit Repair Manual - Includes Detailed Procedures and Instructions. | ISBN-10: 01791412025 | ISBN-13: 9781791412029 | OEM Part Number: X-7845