This factory service and repair manual for the 1989 GMC P3500 has five engines to keep straight, from the turbocharged 3.9L inline-four diesel at one end to the 7.4L V8 gasoline at the other, with the 5.7L V8, the 4.8L inline-six and the naturally aspirated 6.2L V8 diesel in between. The truck was built as a two-door delivery van and as a chassis, each in Base Stripped or Value form. Procedures, specifications, torque values, wiring diagrams and diagnostics are grouped by system and broken out per engine wherever the figures differ.
Engines covered
- 7.4L V8 (454 cu in) — OHV, naturally aspirated, gasoline
- 6.2L V8 (379 cu in) — OHV, naturally aspirated, diesel
- 4.8L inline-six (292 cu in) — OHV, naturally aspirated, gasoline
- 5.7L V8 (350 cu in) — OHV, naturally aspirated, gasoline
- 3.9L inline-four (239 cu in) — OHV, turbocharged, diesel
Body styles covered
- 2-door van delivery van
- Chassis
Trims covered
- Base Stripped
- Value
Known issues on the 1989 P3500. Two recalls sit on the federal record for this model year, and both concern replacement filters rather than the truck as built. In the first, certain replacement fuel filters could fail to seal properly at the connection and leak fuel, which near an ignition source raises a fire risk. In the second, certain replacement oil filters could seal inadequately and let the engine lose its oil, again with a fire hazard attached. One owner complaint is also on the federal record, logged against the power train. The fuel and lubrication procedures here, with their specifications and torque values, and the driveline diagnostics, are the sections that bear on all three.
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
CERTAIN REPLACEMENT FUEL FILTERS, FRAM BRAND NAME P/N G3727, WITH DATE CODES X52911 THROUGH X60801 SEQUENTIALLY OR X600141 AND A MEXICO COUNTRY OR ORIGIN MARKING ON THE FUEL FILTER HOUSING MANUFACTURE
THIS CONDITION MAY CAUSE AN INADEQUATE SEAL AT THE CONNECTION, POTENTIALLY LEADING TO A FUEL LEAK. I
HONEYWELL WILL NOTIFY OWNERS AND REPLACE THE FUEL FILTERS FREE OF CHARGE. THE RECALL BEGAN ON OCTOB
AT APRROX. 25K TRANSMISSION HAD TO BE REBUILT. TT
