The service and repair manual for the 2008 GMC Sierra — 6.2L V8 and 5.3L V8 engines, 2 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 | 2008 |
|---|---|
| Engines | 6.2L V8 — 376 cu in, OHV 5.3L V8 — 325 cu in, OHV |
| Trims | Denali Crew Cab Pickup 4-Door · Base Crew Cab Pickup 4-Door |
| Other 2008 Sierra variants | Sierra 1500 → · Sierra 2500 HD → · Sierra 3500 HD → |
| Federal record | 2 recalls · 84 complaints · 190 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 2008 Sierra manual
03 / ContentsSections in the manual
- Quick Lookups 1,157
- General Information 1,889
- Accessories & Equipment 4,751
- Heating, Ventilation & A/C (HVAC) 378
- Body & Frame 1,941
- Brakes 1,121
- Restraints 396
- Drivelines & Axles 623
- Steering 236
- Electrical 3,870
- Suspension 235
- Engine Mechanical 1,264
- Transmission 1,368
- Engine Performance 2,596
- Front 177
04 / Known issuesRecalls on federal record for the 2008 Sierra
- Electrical System · 08V441000This may cause other electrical features to malfunction, create an odor, or cause smoke increasing t.
- Electrical System · 10V240000It is possible for the heated washer module to ignite and a fire may occur.
Owners have filed 84 complaints and GMC has issued 190 technical service bulletins for the 2008 Sierra. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 2008 Sierra manual
Is this manual specific to the 2008 Sierra?
Yes. It is the OEM manual matched to the 2008 model year, covering the 6.2L V8 and 5.3L V8 across the Denali Crew Cab Pickup 4-Door, Base Crew Cab Pickup 4-Door trims. Specifications and procedure sequences are the ones GMC published for this year.
What 2008 Sierra problems does it help with?
2 recalls are on federal record for the 2008 Sierra, covering electrical system. 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 2008 Sierra wiring diagrams?
Yes — the complete wiring diagrams for the 2008 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 Sierra years and 2008 GMC models
2014 Sierra · 2013 Sierra · 2012 Sierra · 2011 Sierra · 2010 Sierra · 2009 Sierra · 2007 Sierra · all 18 years
2008 GMC Acadia · 2008 GMC C4500 Topkick · 2008 GMC C5500 Topkick · 2008 GMC C6500 Topkick · 2008 GMC C7500 Topkick · 2008 GMC C8500 Topkick · 2008 GMC Canyon · 2008 GMC Envoy · 2008 GMC Savana 1500 · 2008 GMC Savana 2500 · 2008 GMC Savana 3500 · 2008 GMC Sierra 1500 · every 2008 model