The service and repair manual for the 1988 GMC R2500 — 7.4L V8 and 6.2L V8 and 4.8L I6 and 5.7L V8 engines, 3 trims. Matched to this exact model year, so the specifications and sequences are the ones GMC published for your car, not figures carried over from a neighbouring year.
01 / FitmentWhat this manual covers
| Model year | 1988 |
|---|---|
| Engines | 7.4L V8 — OHV 6.2L V8 — OHV 4.8L I6 — OHV 5.7L V8 — OHV |
| Trims | High Sierra Crew Cab Pickup 4-Door · Base Crew Cab Pickup 4-Door · Sierra Classic Crew Cab Pickup 4-Door |
| Other 1988 R2500 variants | R2500 Suburban → |
| Federal record | 2 recalls · 0 complaints · 0 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 1988 R2500 manual
03 / ContentsSections in the manual
- Quick Lookups 67
- Engine Performance 873
- Accessories & Equipment 115
- General Information 1,523
- Body & Frame 28
- Heating, Ventilation & A/C (HVAC) 132
- Brakes 132
- Maintenance 52
- Drivelines & Axles 97
- Steering 122
- Electrical 144
- Suspension 54
- Engine Mechanical 265
- Transmission 466
- Steering Wheel Retaining Nut 30
04 / Known issuesRecalls on federal record for the 1988 R2500
- Equipment · 07E088000This condition may cause inadequate sealing and loss of engine oil, possibly resulting in a fire.
- Fuel System, Gasoline · 06E043000This condition may cause an inadequate seal at the connection, potentially leading to a fuel leak. i.
Owners have filed 0 complaints and GMC has issued 0 technical service bulletins for the 1988 R2500. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 1988 R2500 manual
Is this manual specific to the 1988 R2500?
Yes. It is the OEM manual matched to the 1988 model year, covering the 7.4L V8 and 6.2L V8 and 4.8L I6 and 5.7L V8 across the High Sierra Crew Cab Pickup 4-Door, Base Crew Cab Pickup 4-Door, Sierra Classic Crew Cab Pickup 4-Door trims. Specifications and procedure sequences are the ones GMC published for this year.
What 1988 R2500 problems does it help with?
2 recalls are on federal record for the 1988 R2500, covering equipment, fuel system, gasoline. The manual carries the manufacturer's diagnostic and repair procedures for those systems; the recall repairs themselves are done free by GMC dealers.
Does it include 1988 R2500 wiring diagrams?
Yes — the complete wiring diagrams for the 1988 build, alongside repair procedures, specifications and diagnostics.
Is it a subscription?
No. $29.99 once and the manual is yours. It is a digital manual — nothing ships; access details arrive by email after checkout and it works on any device.
RelatedOther R2500 years and 1988 GMC models
1989 R2500 · 1987 R2500 · all 3 years
1988 GMC Astro · 1988 GMC B6000 · 1988 GMC Brigadier · 1988 GMC C1500 · 1988 GMC C1500 Suburban · 1988 GMC C2500 · 1988 GMC C2500 Suburban · 1988 GMC C3500 · 1988 GMC C5000 · 1988 GMC C6000 · 1988 GMC C7000 · 1988 GMC G1500 · every 1988 model