1988 GMC G3500 Service and Repair Manual
This factory service and repair manual for the 1988 GMC G3500 carries a big-block option on the one-ton van's engine list, so the coverage spans a 6.2L diesel V8 of 379 cubic inches, a 4.3L V6 of 262, a 5.7L V8 of 350 and a 7.4L V8 of 454, all overhead-valve and naturally aspirated. Five bodies are documented, from the 3-door standard cargo van to the extended passenger van and the 2-door cutaway, with seven trims across them. Procedures, specifications, torque values, wiring diagrams and diagnostics accompany each system.
Engines covered
- 6.2L V8 (379 cu in) — OHV, naturally aspirated, diesel
- 4.3L V6 (262 cu in) — OHV, naturally aspirated, gasoline
- 5.7L V8 (350 cu in) — OHV, naturally aspirated, gasoline
- 7.4L V8 (454 cu in) — OHV, naturally aspirated, gasoline
Body styles covered
- 3-door standard cargo van
- 3-door extended passenger van
- 2-door cutaway van
- 3-door standard passenger van
- 3-door extended cargo van
Trims covered
- Magnavan
- Rally
- Rally Camper Special
- Rally Custom
- Rally STX
- Vandura
- Vandura Special
Known issues on the 1988 G3500. The federal record for the 1988 G3500 is clean, carrying no recalls and no owner complaints at NHTSA. The manual is therefore judged on its service content, which covers all four engines listed, including the 7.4L V8 and the 6.2L diesel, with specifications and repair procedures for each. Torque values for the axles, brakes, steering and suspension of a one-ton chassis follow, along with wiring diagrams for the extended and cutaway bodies as well as the standard van, and diagnostics for every system documented.
CERTAIN HONEYWELL FRAM RACING BRAND HP4 AND HP8 OIL FILTERS THAT WERE MANUFACTURED FROM MAY 25, 2006, THROUGH SEPTEMBER 14, 2007, AND SOLD FOR USE AS REPLACEMENT EQUIPMENT FOR VEHICLES LIST ABOVE. TH
THIS CONDITION MAY CAUSE INADEQUATE SEALING AND LOSS OF ENGINE OIL, POSSIBLY RESULTING IN A FIRE.
HONEYWELL WILL REPLACE THE AFFECTED OIL FILTERS FREE OF CHARGE. THE RECALL BEGAN DURING NOVEMBER 20
