OnStar check engine and transmission no code listed

Asked by GuruFVTG7 Apr 19, 2020 at 04:54 PM about the 2016 GMC Sierra 1500 Base Crew Cab

Question type: Maintenance & Repair

Engine light came on and got onstar message to
check engine and transmission within 7 days. No
code number given and no obvious problem
noticed. Just turned 40,000 miles

1 Answer

125,875

Visit your local auto parts store and have them scan the computer for trouble codes. Most stores will do it for free. Post the codes you get and we can help further! Jim

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