The service and repair manual for the 2008 Hummer H3 — 3.7L I5 and 5.3L V8 engines, 5 trims. Matched to this exact model year, so the specifications and sequences are the ones Hummer published for your car, not figures carried over from a neighbouring year.
01 / FitmentWhat this manual covers
| Model year | 2008 |
|---|---|
| Engines | 3.7L I5 — 223 cu in, DOHC 5.3L V8 — 325 cu in, OHV |
| Trims | X Sport Utility 4-Door · Base Sport Utility 4-Door · Luxury Sport Utility 4-Door · Adventure Sport Utility 4-Door · Alpha Sport Utility 4-Door |
| Federal record | 1 recall · 154 complaints · 296 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 2008 H3 manual
03 / ContentsSections in the manual
- Quick Lookups 650
- General Information 1,733
- Accessories & Equipment 3,372
- Heating, Ventilation & A/C (HVAC) 198
- Body & Frame 1,051
- Maintenance 16
- Brakes 824
- Restraints 393
- Drivelines & Axles 331
- Steering 149
- Electrical 2,648
- Suspension 205
- Engine Mechanical 720
- Transmission 1,509
- Engine Performance 2,074
- Front 191
04 / Known issuesRecalls on federal record for the 2008 H3
- Structure — body › hood · 10V179000If the vehicle is being driving when this occurs, it could strike a following vehicle and cause inju.
Owners have filed 154 complaints and Hummer has issued 296 technical service bulletins for the 2008 H3. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 2008 H3 manual
Is this manual specific to the 2008 H3?
Yes. It is the OEM manual matched to the 2008 model year, covering the 3.7L I5 and 5.3L V8 across the X Sport Utility 4-Door, Base Sport Utility 4-Door, Luxury Sport Utility 4-Door, Adventure Sport Utility 4-Door, Alpha Sport Utility 4-Door trims. Specifications and procedure sequences are the ones Hummer published for this year.
What 2008 H3 problems does it help with?
1 recall is on federal record for the 2008 H3, covering structure. The manual carries the manufacturer's diagnostic and repair procedures for those systems; the recall repairs themselves are done free by Hummer dealers.
Does it include 2008 H3 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 H3 years and 2008 Hummer models
2010 H3 · 2009 H3 · 2007 H3 · 2006 H3 · all 5 years