2012 GMC Sierra HD

It says that compromise should never have a place in art or engineering. Which is why the 2012 GMC Sierra HD offers the only available fully automatic locking rear differential in its class. And it makes it all the more obvious that with professional grade, even everyday life can be a work of art.

Download 2012 GMC Sierra HD Brochure





Regular Cab Long Box: 2500HD 2WD/4x4 and 3500HD Single Rear Wheel (SRW)/Dual Rear Wheel (DRW) 2WD/4x4
Extended Cab Standard Box: 2500HD 2WD/4x4
Extended Cab Long Box: 2500HD 2WD/4x4 and 3500HD SRW/DRW 2WD/4x4
Crew Cab Standard Box: 2500HD 2WD/4x4 and 3500HD SRW 2WD/4x4
Crew Cab Long Box: 2500HD 2WD/4x4 and 3500HD SRW/DRW 2WD/4x4


  2500HD 3500HD
Standard Box cargo volume (cu. ft.)1 60.7 60.7
Long Box cargo volume (cu. ft.)1 75.5 75.5
Payload (lbs.)2 4,192 6,635
Fuel tank (gal. approx.) 36 36
Seating (Regular Cab/Extended Cab and Crew Cab) 3/6 3/6
Trailer weight rating (lbs.)3 17,800 21,700
GVWR (lbs.)4 10,000 13,000


Ultrasonic Rear Parking Assist5,6 (SLE and SLT only)


Liftgate with liftglass, remote, power-operated; includes rear-window wiper/washer
Rear-vision camera system
Recovery hooks
Remote vehicle starter system


Vortec 6.0L V8, with 360 hp (322 hp with box delete and on 3500HD models) and 380 lb.-ft. of torque
Automatic locking rear differential (std. on SLT; optional on WT and SLE)
Electronic shift transfer case (4x4 models only) (SLE and SLT only)
Handling/Trailering suspension
Manual shift-on-the-fly transfer case (4x4 models only) (WT only)
Oil cooler, engine: heavy-duty, external
Oil cooler, transmission: auxiliary, heavy-duty, external
Trailering Package: trailer hitch platform, seven-wire harness, automatic locking rear differential, integrated trailer brake controller
Six-speed automatic transmission with Tow/Haul mode7


Duramax 6.6L Turbo-Diesel V8, with 397 hp and 765 lb.-ft. of torque8 (335 hp and 685 lb. -ft. of torque with box delete)
Allison® 1000 Series, six-speed automatic transmission with engine-grade braking and Tow/Haul mode9
Exhaust brake10
Skid Plate Package: frame-mounted shield protecting front underbody, oil pan, differential case and transfer case (requires 4x4 on WT models)
Snow Plow Prep Package: 10-amp power for backup and roof emergency light, high-flow front bumper, Skid Plate Package and electrical relays (4x4 models only; see dealer for additional ordering information)
Z71 Off-Road Suspension: 36mm shock absorbers, off-road jounce bumpers, automatic locking rear differential, Skid Plate Package and Z71 decals on rear-quarter panels (SLE, SLT and SRW models only)


Driver and right-front passenger frontal air bags11
Four-wheel antilock disc brakes
Integrated trailer brake controller12 (std. on SLT; optional on WT and SLE)
OnStar®:13 Directions & Connections® Plan for the first six months (optional on WT)
StabiliTrak Electronic Stability Control System (SRW models only)


Head-curtain side-impact air bags11
Seat-mounted side-impact air bags11 for thorax and pelvic protection


Air conditioning: manual (WT and SLE only)
Air conditioning: automatic, dual-zone (std. on SLT; optional on SLE)
Power, rear-access door windows14 (SLE and SLT only)


Power sunroof (SLT only)
Power-sliding rear window5,15 (SLE and SLT only)
Rear-vision camera system (display in rearview mirror or nav screen if equipped) (SLE and SLT only)


Vinyl 40/20/40 split-bench seat with recliners (WT only)
Premium Cloth 40/20/40 split-bench front seat with recliners, center armrest with storage and lockable underseat storage (also available with Custom Leather-appointed trim) (SLE only)
Custom Leather-appointed, reclining, heated, 10-way power-adjustable front bucket seats (SLT only)


Cloth 40/20/40 split-bench seat with recliners (WT only)
Premium Cloth reclining, six-way power-adjustable front bucket seats (also available with Custom Leather-appointed trim) (SLE only)


AM/FM stereo (WT only)
AM/FM stereo with CD/MP3 player (std. on SLE; optional on WT)
Bluetooth® wireless technology16 for select phones (std. on SLT; optional on WT and SLE)
Bose® speaker system (std. on SLT; optional on SLE)
SiriusXM Radio:17 with three trial months (std. on SLE and SLT; optional on WT)


AM/FM stereo with CD/MP3 player and USB port18 (std. on SLT; optional on SLE)
AM/FM stereo with in-dash six-disc CD/MP3 player and USB port18 (SLT only)
Rear-seat DVD entertainment system19 (SLT only)
Touch-screen navigation radio20 with CD/MP3/DVD player,21 USB port, 18 Radio Data System (RDS)22 and TheftLock (SLT only)
NavTraffic:23 with three trial months (SLT only)


17-inch painted steel (2500HD) (WT only)
17-inch machined-aluminum (2500HD) (SLE only)
17-inch painted steel (3500HD DRW)
18-inch polished forged-aluminum (2500HD) (std. SLT; optional on SLE)
18-inch polished forged-aluminum (3500HD SRW) (SLT and SLE only)
18-inch painted steel (3500HD SRW; optional on 2500HD WT) (WT only)


17-inch chrome-clad steel (2500HD) (WT only)
17-inch polished forged-aluminum19 (3500HD) (SLE only)
20-inch polished forged-aluminum24 (2500HD) (SLT and SLE only)
  • 1 Cargo and load capacity limited by weight and distribution.
  • 2 Maximum payload capacity includes weight of driver, passengers, optional equipment and cargo.
  • 3 Maximum trailer weight ratings are calculated assuming a base vehicle, except for any option(s) necessary to achieve the rating, plus driver. The weight of other optional equipment, passengers and cargo will reduce the maximum trailer weight your vehicle can tow. See your dealer for additional details.
  • 4 Gross Vehicle Weight Rating (GVWR). When properly equipped: includes weight of vehicle, driver, passengers, cargo and optional equipment.
  • 5 Extended and Crew Cab models only.
  • 6 Requires available Convenience Package.
  • 7 Requires Vortec 6.0L V8 engine.
  • 8 Requires available Allison 1000 Series six-speed automatic transmission.
  • 9 Required with Duramax 6.6L Turbo-Diesel V8 engine.
  • 10 Included with Duramax 6.6L Turbo-Diesel V8 engine.
  • 11 Always use safety belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner's Manual for more information.
  • 12 Requires available Trailering Package.
  • 13 Visit onstar.com for coverage map, details and system limitations. Services vary by model and conditions.
  • 14 Extended Cab models only.
  • 15 Not available with rear-window defogger.
  • 16 Go to gm.com/bluetooth to find out which phones are compatible with the vehicle.
  • 17 Requires a subscription sold separately by SiriusXM after three-month trial. Available only in the 48 contiguous United States and Washington, D.C. Visit siriusxm.com for details.
  • 18 Not compatible with all devices.
  • 19 Crew Cab models only.
  • 20 Map coverage excludes Puerto Rico, the Virgin Islands and portions of Canada.
  • 21 Requires Crew Cab models. 22 RDS functions only where stations broadcast RDS information.
  • 22 RDS functions only where stations broadcast RDS information.
  • 23 Requires a subscription sold separately by SiriusXM after trial period. Available only in select markets. For more information, see siriusxm.com/navtraffic.
  • 24 Use only GM-approved tire and wheel combinations. Unapproved combinations may change the vehicle's performance characteristics. For important tire and wheel information, go to gmaccessorieszone.com or see your dealer for details.

  • GM, the GM Logo, GMC, the GMC Logo, and the slogans, emblems, vehicle model names, vehicle body designs and other marks appearing in this document are the trademarks and/or service marks of General Motors, its subsidiaries, affiliates or licensors. The Bluetooth word mark is a registered trademark owned by Bluetooth SIG, Inc. and any use of such mark by GMC is under license. Bose is a registered trademark of the Bose Corp. Allison is a registered trademark of Allison Transmission, Inc. SiriusXM and all related marks and logos are trademarks of SiriusXM Radio Inc. and its subsidiaries. TheftLock is a registered trademark of Delphi Technologies, Inc. ©2012 OnStar. All rights reserved. ©2012 General Motors. All rights reserved. GM reserves the right to make changes at any time and without notice in prices, colors, materials, equipment, specifications, models and availability.