The service and repair manual for the 1986 GMC S15 — 2.8L V6 and 2.5L I4 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 | 1986 |
|---|---|
| Engines | 2.8L 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 · Gypsy Extended Cab Pickup 2-Door · High Sierra Standard Cab Pickup 2-Door · Base Cab & Chassis 2-Door +3 |
| Other 1986 S15 variants | S15 Jimmy → |
| Federal record | 2 recalls · 3 complaints · 0 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 1986 S15 manual
03 / ContentsSections in the manual
- Quick Lookups 63
- Engine Performance 704
- Accessories & Equipment 142
- General Information 1,523
- Body & Frame 41
- Heating, Ventilation & A/C (HVAC) 100
- Brakes 67
- Maintenance 53
- Drivelines & Axles 54
- Steering 137
- Electrical 123
- Suspension 41
- Engine Mechanical 206
- Transmission 324
- Steering Wheel Retaining Nut 30
04 / Known issuesRecalls on federal record for the 1986 S15
- Equipment — other › labels · 86V140000Tire and wheel information on certification label may be incorrect.
- Exterior Lighting — headlights › switch · 86V131000The push pull headlight switch may have electrical contacts which allow an intermittent headlight circuit causing headlight to flicker or suddenly go out.
Owners have filed 3 complaints and GMC has issued 0 technical service bulletins for the 1986 S15. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 1986 S15 manual
Is this manual specific to the 1986 S15?
Yes. It is the OEM manual matched to the 1986 model year, covering the 2.8L 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, Gypsy Extended Cab Pickup 2-Door, High Sierra Standard Cab Pickup 2-Door, Base Cab & Chassis 2-Door, Gypsy 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 1986 S15 problems does it help with?
2 recalls are on federal record for the 1986 S15, covering equipment, exterior lighting. 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 1986 S15 wiring diagrams?
Yes — the complete wiring diagrams for the 1986 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 1986 GMC models
1990 S15 · 1989 S15 · 1988 S15 · 1987 S15 · 1985 S15 · 1984 S15 · 1983 S15 · 1982 S15 · all 9 years
1986 GMC Astro · 1986 GMC B6000 · 1986 GMC Brigadier · 1986 GMC C1500 · 1986 GMC C1500 Suburban · 1986 GMC C2500 · 1986 GMC C2500 Suburban · 1986 GMC C3500 · 1986 GMC C5000 · 1986 GMC C6000 · 1986 GMC C7000 · 1986 GMC Caballero · every 1986 model