YearToAvoid

2012 GMC Sierra 3500 Reliability Data: Problems & Recalls

Best The 2012 GMC Sierra 3500 ranks 19th out of 21 model years with a complaint index of 10, the lowest among all years, earning a Best verdict. It has 9 complaints, 4 recalls, and no crashes, fires, injuries, or deaths reported.

Based on NHTSA complaints per model-year, not a reliability rating. Methodology

YearToAvoid Scorecard

Complaint Index
10/100
#19 of 21 Sierra 3500 years
Verdict
Best
vs. other years of this model
Complaints
9
unique NHTSA reports
Recalls
4
distinct NHTSA campaigns
Crashes
0
reported in complaints
Fires
0
Injuries
0
Top issue
Engine
Best nearby year
2013
rated Best

Top 2012 GMC Sierra 3500 problems

Share of this year’s NHTSA complaints by component group. Groups with 15+ complaints have their own page.

  1. Engine3 (33%)
  2. Fuel System3 (33%)
  3. Transmission & Powertrain3 (33%)
  4. Electrical System2 (22%)
  5. Other2 (22%)
  6. Airbags1 (11%)
  7. Brakes1 (11%)

A complaint can list more than one component, so shares add up to more than 100%. Shares are % of complaints.

What owners report

  • Sudden loss of all electrical systems and engine shutdown while towing a trailer at highway speed in wet conditions, requiring a tow.
  • Check engine light and reduced engine power message appearing while towing a heavy trailer up a grade, cutting speed down to as low as 20 mph on the interstate.
  • Engine dying shortly after a dealer visit, later diagnosed as high pressure fuel injector pump failure with metal contamination in the fuel system.
  • Transmission suddenly shifting hard into a higher gear during highway driving.
  • Transmission failing to downshift properly when towing, including downshifting to 2nd gear while going 60 mph downhill.
  • Brake controller disabling itself along with a service brakes warning light while towing.
2012 GMC Sierra 3500 complaints: complaints filed per month1Feb 2013Jul 2013Feb 2015Oct 2017Jan 2026
9 complaints filed with NHTSA from Feb 2013 to Jan 2026; peak Feb 2013 (1).

2012 GMC Sierra 3500 recalls

4 NHTSA recall campaigns list this model year.

  1. NHTSA 21V051000Feb 5, 2021Airbags284,645 vehicles

    Air bags:frontal:passenger side:inflator module

    General Motors, LLC (GM) is recalling certain 2012 Cadillac Escalade, Escalade ESV, Escalade EXT, Chevrolet Avalanche, Silverado 1500, Silverado 2500/3500, Suburban, Tahoe, GMC Sierra 1500, Sierra 2500/3500, Yukon, and Yukon XL originally sold, or ever registered, in the states of Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina, Texas, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan), and the U.S. Virgin Islands or "Zone A." These vehicles are equipped with non-desiccated passenger frontal inflators containing phase-stabilized ammonium nitrate (PSAN) propellant. These inflators may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, high temperatures, and high temperature cycling.

    Risk: An inflator explosion may result in sharp metal fragments striking the driver or other occupants, resulting in serious injury or death.

    Remedy: GM will notify owners, and dealers will replace the front passenger air bag inflator with an alternate one, free of charge. Interim letters notifying owners of the safety risk were mailed on February 22, 2021. Second notification letters will be mailed once the remedy is available. Owner notification letters were mailed on May 11, 2021. Owners may contact Cadillac customer service at 1-800-458-8006; Chevrolet customer service at 1-800-222-1020; and GMC customer service at 1-800-462-8782. GM's number for this recall is N212328770.

  2. NHTSA 21V054000Feb 5, 2021Airbags1,778,128 vehicles

    Air bags:frontal:passenger side:inflator module

    General Motors, LLC (GM) is recalling certain 2014 Cadillac Escalade, Escalade ESV, Chevrolet Silverado 2500, Silverado 3500, Suburban, Tahoe, GMC Sierra 2500, Sierra 3500, Yukon, and Yukon XL vehicles originally sold, or ever registered, in the states of AL, CA, FL, GA, HI, LA, MS, SC, TX, PR, AS, GU, the MP, and VI or "Zone A." Additionally GM is recalling certain 2011-2014 Cadillac Escalade, Escalade ESV, Chevrolet Silverado 2500, Silverado 3500, Suburban, Tahoe, GMC Sierra 2500, Sierra 3500, Yukon, Yukon XL and 2011-2013 Cadillac Escalade EXT, Chevrolet Avalanche, Silverado 1500, and GMC Sierra 1500 vehicles originally sold, or ever registered, in the states of AZ, AR, DE, DC, IL, IN, KS, KY, MD, MO, NE, NV, NJ, NM, NC, OH, OK, PA, TN, VA, and WV or "Zone B." Additionally, GM is recalling certain 2010-2014 Cadillac Escalade, Escalade ESV, Chevrolet Silverado 2500, Silverado 3500, Suburban, Tahoe, GMC Sierra 2500, Sierra 3500, Yukon, and Yukon XL and 2010-2013 Cadillac Escalade EXT, Chevrolet Avalanche, Silverado 1500, and GMC Sierra 1500 vehicles originally sold, or ever registered, in the states of AK, CO, CT, ID, IA, ME, MA, MI, MN, MT, NH, NY, ND, OR, RI, SD, UT, VT, WA, WI, and WY or "Zone C." These vehicles are equipped with non-desiccated passenger frontal inflators containing phase-stabilized ammonium nitrate (PSAN) propellant. These inflators may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, high temperatures, and high temperature cycling.

    Risk: An inflator explosion may result in sharp metal fragments striking the driver or other occupants, resulting in serious injury or death.

    Remedy: GM will notify owners, and dealers will replace the front passenger air bag inflator with an alternate one, free of charge. Interim letters notifying owners of the safety risk were mailed on February 25, 2021. Second notification letters will be mailed once the remedy is available. Owner notification letters were mailed to 40 VIN owners on May 11, 2021. A second owner notification letter was mailed to all other owners on January 24, 2022. Owners may contact Chevrolet customer service at 1-800-222-1020; Cadillac customer service at 1-800-458-8006; and GMC customer service at 1-800-462-8782. GM's number for this recall is N212328800.

  3. NHTSA 18V267000Apr 26, 2018Other6,154 vehicles

    Equipment

    General Motors LLC (GM) is recalling certain 2009-2014 Chevrolet Silverado HD and GMC Sierra HD, 2009 GMC Topkick 5000, 6000, 7000 and 8000 Series and Isuzu F Series, and 2009-2018 Chevrolet Express, and GMC Savana vehicles, equipped with certain Plastic-Handle Fire Extinguishers or Push Button 'Pindicator' Fire Extinguishers. These extinguishers may become clogged, preventing the extinguisher from discharging as expected or requiring excessive force to activate the extinguisher. Additionally, in certain models, the nozzle may detach from the valve assembly with enough force that it could cause injury and also render the product inoperable. For a full list of the affected fire extinguisher models visit: https://static.nhtsa.gov/odi/rcl/2017/RMISC-17E062-5427.pdf

    Risk: In the event of a fire, if the fire extinguisher does not function properly, it can increase the risk of injury.

    Remedy: GM will notify owners, instructing them to contact Kidde to get a replacement fire extinguisher, free of charge. The recall began June 11, 2018. Owners may contact Chevrolet customer service at 1-800-222-1020, GMC customer service at 1-800-462-8782, and Isuzu customer service at 1-866-441-9638. GM's number for this recall is 18146.

See all 4 recalls for the 2012 GMC Sierra 3500 →

2012 compared with other Sierra 3500 years

Complaint Index by model year (0 = fewest issues, 100 = most)0255075100’05’06’07’08’09’10’11’12’13’14’15’16’17’18’19’20’21’22’23’24’25
Complaint Index: 0 = fewest issues, 100 = most, relative to other years of this model. Avoid Caution Good Best
YearVerdictIndexComplaintsRecallsMPG
2010No verdict025—
2011Caution60205—
2012Best1094—
2013Best20144—
2014Best1573—

All GMC Sierra 3500 years: best and worst →

Frequently asked questions

Is the 2012 GMC Sierra 3500 reliable?
Based on NHTSA owner complaints and recalls, the 2012 model year has a complaint index of 10, the lowest of all 21 model years covered, and carries a Best verdict relative to other Sierra 3500 years.
What problems does the 2012 GMC Sierra 3500 have?
NHTSA lists 9 complaints for the 2012 Sierra 3500, spread evenly across Engine, Fuel System, and Transmission & Powertrain, each accounting for 33 percent of complaints, plus smaller counts in Electrical System, Airbags, and Brakes.
Does the 2012 GMC Sierra 3500 have any recalls?
Yes, NHTSA lists 4 recall campaigns for the 2012 Sierra 3500, covering airbag inflators (two separate campaigns), a fire extinguisher replacement, and a dual fuel tank sensor issue. None are do-not-drive recalls.
How does the 2012 Sierra 3500 compare to other model years?
The 2012 model ranks 19th worst out of 21 years by complaint index, well below higher-complaint years like 2020 (index 95) and 2024 (index 100), both of which carry Avoid verdicts.
At what mileage do 2012 Sierra 3500 problems typically show up?
The median mileage at failure across all reported problems is 31,200 miles, though individual problem areas vary, with Transmission & Powertrain issues showing up at a median of 16,400 miles.

Sources: NHTSA Office of Defects Investigation complaint and recall databases; U.S. EPA fuel economy data; NHTSA 5-Star Safety Ratings. Complaints are unverified owner reports.

Data updated Sep 24, 2026. Read the methodology and data sources. The Complaint Index is based on NHTSA owner complaints and recalls; it is not a reliability rating.