The service and repair manual for the 1991 GMC C2500 — 5.0L V8 and 7.4L V8 and 6.2L V8 and 4.3L V6 and 5.7L V8 engines, 9 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 | 1991 |
|---|---|
| Engines | 5.0L V8 — OHV 7.4L V8 — OHV 6.2L V8 — OHV 4.3L V6 — OHV 5.7L V8 — OHV |
| Trims | Sierra SLE Standard Cab Pickup 2-Door · Sierra Extended Cab Pickup 2-Door · Sierra SLE Extended Cab Pickup 2-Door · Sierra SLX Extended Cab Pickup 2-Door · Sierra SLX Standard Cab Pickup 2-Door · Sierra SLX Cab & Chassis 2-Door +3 |
| Federal record | 2 recalls · 4 complaints · 0 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 1991 C2500 manual
03 / ContentsSections in the manual
- Quick Lookups 66
- Engine Performance 1,069
- Accessories & Equipment 170
- General Information 1,523
- Body & Frame 67
- Heating, Ventilation & A/C (HVAC) 195
- Brakes 243
- Maintenance 66
- Drivelines & Axles 101
- Steering 125
- Electrical 145
- Suspension 65
- Engine Mechanical 377
- Transmission 811
- Steering Column Support Bracket 22
- Steering Wheel Retaining Nut 30
- Ignition Switch-To-Column Screws 35
- Lock Cylinder Retaining Screw 22
- Turn Signal Switch Screws 35
04 / Known issuesRecalls on federal record for the 1991 C2500
- Equipment · 07E088000This condition may cause inadequate sealing and loss of engine oil, possibly resulting in a fire.
- Power Train — automatic transmission · 93V016000The vented transmission fluid can catch fire if exposedto a source of ignition.
Owners have filed 4 complaints and GMC has issued 0 technical service bulletins for the 1991 C2500. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 1991 C2500 manual
Is this manual specific to the 1991 C2500?
Yes. It is the OEM manual matched to the 1991 model year, covering the 5.0L V8 and 7.4L V8 and 6.2L V8 and 4.3L V6 and 5.7L V8 across the Sierra SLE Standard Cab Pickup 2-Door, Sierra Extended Cab Pickup 2-Door, Sierra SLE Extended Cab Pickup 2-Door, Sierra SLX Extended Cab Pickup 2-Door, Sierra SLX Standard Cab Pickup 2-Door, Sierra SLX Cab & Chassis 2-Door, Sierra Cab & Chassis 2-Door, Sierra SLE Cab & Chassis 2-Door, Sierra Standard Cab Pickup 2-Door trims. Specifications and procedure sequences are the ones GMC published for this year.
What 1991 C2500 problems does it help with?
2 recalls are on federal record for the 1991 C2500, covering equipment, power train. 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 1991 C2500 wiring diagrams?
Yes — the complete wiring diagrams for the 1991 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 C2500 years and 1991 GMC models
1997 C2500 · 1996 C2500 · 1995 C2500 · 1994 C2500 · 1993 C2500 · 1992 C2500 · 1990 C2500 · 1989 C2500 · 1988 C2500 · 1986 C2500 · 1985 C2500 · all 18 years
1991 GMC B6000 · 1991 GMC C1500 · 1991 GMC C1500 Suburban · 1991 GMC C2500 Suburban · 1991 GMC C3500 · 1991 GMC C3500HD · 1991 GMC C5000 Topkick · 1991 GMC C6000 Topkick · 1991 GMC C7000 Topkick · 1991 GMC G1500 · 1991 GMC G2500 · 1991 GMC G3500 · every 1991 model