2012 Chevrolet Silverado 2500 HD / 3500 HD repair manual

2012 Chevrolet Silverado 2500 HD / 3500 HD workshop manual (GMT900): factory repair procedures and wiring diagrams

The 2012 Chevrolet Silverado 2500 HD / 3500 HD (GMT900) factory repair manual, made for your VIN from GM's factory service data: step-by-step repair procedures, specifications and wiring diagrams for your exact Silverado 2500 HD / 3500 HD. The 2012 Silverado 2500 HD / 3500 HD was offered with two engines and two transmissions (listed below); the manual you get is for the combination in your VIN.

This page is for the heavy-duty 2012 Silverado 2500 HD and 3500 HD. For the light-duty truck, see the 2012 Chevrolet Silverado 1500 manual.

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What you get with this manual

• Factory information, not an aftermarket book: the same GM procedures and specifications dealer technicians use
• Matched to your VIN, so you don't wade through versions you don't own
• Yours to keep: pay once and the PDF stays with you
• A PDF with working hyperlinks: click a reference in a procedure and you land on the wiring diagram, spec or step it points to. Most PDF manuals sold online are flat scans without them
• Computer, phone or tablet: no app needed, and you can print the pages you work from
• A real person checks every order and the VIN before the manual is built

Not the owner's manual

Many people search for the 2012 Silverado 2500 HD / 3500 HD owner's manual and need more than it gives. The difference:

• Owner's manual: controls, warning lights, maintenance schedule, fluid types
• Factory repair manual: removal and installation steps, torque specs, diagnostic trouble codes, wiring diagrams and component locations

Model year 2012 is part of the GMT900 Silverado HD generation (2007–2014). Years of the same generation share most procedures; equipment and electrical details still change from year to year, so the manual follows your VIN.

Engines offered

• 6.0L V8 gasoline
• 6.6L Duramax V8 turbo diesel

Transmissions offered

• 6-speed automatic
• Allison 1000 6-speed automatic

The manual is made for the version in your VIN, so you don't have to work out your engine code.

Typical repairs for a 2012 Silverado 2500 HD / 3500 HD

• Wheel bearings and CV joints
• Water pump, thermostat, radiator and hoses
• Engine and transmission mounts
• Ball joints, tie rod ends and control arm bushings
• Oil leaks: valve cover and oil pan gaskets
• Glow plugs and cold-start faults
• Diesel particulate filter regeneration
• EGR valve and cooler

2012 Silverado 2500 HD / 3500 HD: recalls and known problems

The U.S. safety agency NHTSA lists 4 safety recalls and 144 owner complaints for the 2012 Silverado 2500 HD / 3500 HD. The repair steps for these systems are in the manual.

• Equipment (campaign 18V267000)
• Air Bags: Inflator Module (campaign 21V054000)
• Air Bags: Inflator Module (campaign 21V051000)
• Fuel System, Gasoline: Auxillary Tank (campaign 17V664000)

Most owner complaints concern: Air Bags (28), Structure (19), Engine (18), Electrical System (17), Power Train (17).

On a 2012 vehicle the 10th character of the 17-digit VIN is “C”, a quick way to confirm the model year before you order.

More Chevrolet repair manuals: 2012 Camaro, 2012 Impala, 2012 Malibu, 2012 Caprice, 2012 Cheyenne, 2012 Colorado, 2012 Corvette, 2012 Equinox, 2012 Express, 2014 SS Sedan.

Made to order, not a generic download. We start from your VIN, collect the GM procedures and diagrams that apply to it and send you the PDF within 12–24 hours.

Inside the manual

• Vehicle identification and general information
• Lubrication and scheduled maintenance
• Engine: removal, overhaul and timing
• Engine cooling
• Fuel and engine controls
• Starting, charging and battery
• Exhaust and emissions
• Transmission and transfer case
• Axles, driveline and wheel bearings
• Front and rear suspension
• Steering column and gear
• Brake system and ABS
• Climate control
• Supplemental restraint system
• Body repair and dimensions
• Interior and exterior trim
• Power windows, locks and mirrors
• Lighting
• Instrument cluster and warning lights
• Wiring diagrams and connector views
• Diagnostics and trouble codes

Engines:

• 6.0L V8 gasoline
• 6.6L Duramax V8 turbo diesel

Transmissions:

• 6-speed automatic
• Allison 1000 6-speed automatic

Your manual is built for the version in your VIN.

This video is for information. Your manual looks and works the same way, but it is not identical.

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