The service and repair manual for the 2012 GMC Sierra — 5.3L V8 and 6.2L V8 engines, 3 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 | 2012 |
|---|---|
| Engines | 5.3L V8 — 325 cu in, OHV 6.2L V8 — 376 cu in, OHV |
| Trims | Base Standard Cab Pickup 2-Door · Denali Crew Cab Pickup 4-Door · Base Crew Cab Pickup 4-Door |
| Other 2012 Sierra variants | Sierra 1500 → · Sierra 2500 HD → · Sierra 3500 HD → |
| Federal record | 1 recall · 46 complaints · 70 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 2012 Sierra manual
03 / ContentsSections in the manual
- Quick Lookups 1,162
- General Information 1,923
- Accessories & Equipment 5,987
- Heating, Ventilation & A/C (HVAC) 391
- Body & Frame 2,068
- Brakes 939
- Restraints 320
- Drivelines & Axles 607
- Steering 466
- Electrical 4,675
- Suspension 328
- Engine Mechanical 1,411
- Transmission 950
- Engine Performance 4,949
- Front Wheel Drive Shaft to Front Hub Nut 188
- Inch Axle) 115
- Inch Axles) 52
04 / Known issuesRecalls on federal record for the 2012 Sierra
- Fuel System, Diesel · 13V615000If the fuel gauge indicates an inaccurate reading it may result in the vehicle unexpectedly stalling.
Owners have filed 46 complaints and GMC has issued 70 technical service bulletins for the 2012 Sierra. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 2012 Sierra manual
Is this manual specific to the 2012 Sierra?
Yes. It is the OEM manual matched to the 2012 model year, covering the 5.3L V8 and 6.2L V8 across the Base Standard Cab Pickup 2-Door, 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 2012 Sierra problems does it help with?
1 recall is on federal record for the 2012 Sierra, covering fuel system, diesel. 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 2012 Sierra wiring diagrams?
Yes — the complete wiring diagrams for the 2012 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 2012 GMC models
2018 Sierra · 2017 Sierra · 2016 Sierra · 2015 Sierra · 2014 Sierra · 2013 Sierra · 2011 Sierra · 2010 Sierra · 2009 Sierra · 2008 Sierra · 2007 Sierra · all 18 years
2012 GMC Acadia · 2012 GMC Canyon · 2012 GMC Savana 1500 · 2012 GMC Savana 2500 · 2012 GMC Savana 3500 · 2012 GMC Savana 4500 · 2012 GMC Sierra 1500 · 2012 GMC Sierra 2500 HD · 2012 GMC Sierra 3500 HD · 2012 GMC Terrain · 2012 GMC Yukon · 2012 GMC Yukon XL 1500 · every 2012 model