2012 GMC Sierra used buying checklist

Test for the problems owners report most

The most reported problems of this model year, with what to look for on the test drive.

• Electrical system7 owner complaints, usually around 25,072 miles

  Test every screen, camera, power window, lock and the key fob. With the engine running, make sure no warning lights stay on.

• Body and structure6 owner complaints, usually around 31,450 miles

  Look underneath for rust, especially on the frame and brake lines, and check that door and panel gaps are even.

• Engine and cooling6 owner complaints, usually around 12,000 miles

  Start the engine cold and listen for knocking or ticking. Check for warning lights, oil leaks and a low oil level, and ask how often oil had to be topped up.

• Airbags4 owner complaints

  Make sure the airbag warning light turns off after start-up, and that every airbag recall was completed.

Make sure these recalls were done

Recall repairs are free at any dealer of the brand. Ask the seller for proof, or have a dealer check the VIN.

• Electrical systemRecall number 14V827000, Dec 30, 2014
• Fuel system, dieselRecall number 13V615000, Dec 11, 2013

Service bulletins worth asking about

Repair instructions the maker sent to dealers for known problems. Ask whether any of these repairs were done.

• This informational bulletin provides the technician with what may happen to an engine due to lack of...Jul 11, 2016
• This preliminary information communication advises the technician that the part restriction for the...Apr 4, 2016
• EngineMar 1, 2016
• This preliminary information communication provides information to the technician about vehicles that may...Feb 9, 2016
• This informational bulletin provides information on close coupled converters and there affect on newly...Jan 14, 2016
• This informational bulletin provides information on removing paint stains on the under side of protective...Jan 7, 2016

Before you pay

• Decode the VIN and make sure it matches the title, the registration and the car itself.
• Get a vehicle history report to check for accidents, salvage or flood titles and odometer problems.
• Ask for service records, especially oil changes and any transmission fluid service.
• Start the car from cold, and drive it at city and highway speeds for at least 20 minutes.
• Have an independent mechanic inspect the car before you sign anything.