The service and repair manual for the 1990 GMC S15 — 2.8L V6 and 4.3L V6 and 2.5L I4 engines, 6 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 | 1990 |
|---|---|
| Engines | 2.8L V6 — OHV 4.3L V6 — OHV 2.5L I4 — 151 cu in, OHV |
| Trims | Base Extended Cab Pickup 2-Door · Base Standard Cab Pickup 2-Door · Sierra Classic Extended Cab Pickup 2-Door · High Sierra Standard Cab Pickup 2-Door · High Sierra Extended Cab Pickup 2-Door · Sierra Classic Standard Cab Pickup 2-Door |
| Other 1990 S15 variants | S15 Jimmy → |
| Federal record | 3 recalls · 4 complaints · 1 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 1990 S15 manual
03 / ContentsSections in the manual
- Quick Lookups 65
- Engine Performance 757
- Accessories & Equipment 230
- General Information 1,523
- Body & Frame 18
- Heating, Ventilation & A/C (HVAC) 174
- Brakes 80
- Maintenance 53
- Drivelines & Axles 89
- Steering 139
- Electrical 231
- Suspension 101
- Engine Mechanical 162
- Transmission 352
- Steering Column Support Bracket 22
- Steering Wheel Retaining Nut 30
- Ignition Switch-To-Column Screws 35
- Lock Cylinder Retaining Screw 40
- Turn Signal Switch Screws 35
04 / Known issuesRecalls on federal record for the 1990 S15
- Exterior Lighting · 06E049000Without the amber reflectors, the vehicle will be poorly illuminated, possibly resulting in a vehicl.
- Exterior Lighting · 06E026000Without the amber reflectors, the vehicle will be poorly illuminated, possibly resulting in a vehicl.
- Engine And Engine Cooling — cooling system › fan · 93V008000If the blade breakage occurs while the hood is open, aperson working under the hood or in the vicini.
Owners have filed 4 complaints and GMC has issued 1 technical service bulletins for the 1990 S15. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 1990 S15 manual
Is this manual specific to the 1990 S15?
Yes. It is the OEM manual matched to the 1990 model year, covering the 2.8L V6 and 4.3L V6 and 2.5L I4 across the Base Extended Cab Pickup 2-Door, Base Standard Cab Pickup 2-Door, Sierra Classic Extended Cab Pickup 2-Door, High Sierra Standard Cab Pickup 2-Door, High Sierra Extended Cab Pickup 2-Door, Sierra Classic Standard Cab Pickup 2-Door trims. Specifications and procedure sequences are the ones GMC published for this year.
What 1990 S15 problems does it help with?
3 recalls are on federal record for the 1990 S15, covering exterior lighting, engine and engine cooling. 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 1990 S15 wiring diagrams?
Yes — the complete wiring diagrams for the 1990 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 S15 years and 1990 GMC models
1989 S15 · 1988 S15 · 1987 S15 · 1986 S15 · 1985 S15 · 1984 S15 · all 9 years
1990 GMC B6000 · 1990 GMC C1500 · 1990 GMC C1500 Suburban · 1990 GMC C2500 · 1990 GMC C2500 Suburban · 1990 GMC C3500 · 1990 GMC C5000 · 1990 GMC C5000 Topkick · 1990 GMC C6000 · 1990 GMC C6000 Topkick · 1990 GMC C7000 · 1990 GMC C7000 Topkick · every 1990 model