GM Authority

0GM Releases Fix For Faulty 2021 Cadillac CT4 Engine Control Modules

The General has issued a service bulletin describing a fix for certain units of the 2021 Cadillac CT4 compact luxury sedan that may be affected by an incorrectly calibrated Engine Control Module (ECM) ...
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Reasons your check engine light comes on and how to interpret it

When the check-engine light snaps on, it is not a suggestion, it is your car’s way of saying something in the powertrain or ...
GM Authority

0GM Releases Fix For Faulty 2021 Cadillac CT5 Engine Control Modules

The 2021 Cadillac CT5 luxury sedan is included in a newly issued GM service bulletin because a fix is now available for a software problem in the Engine Control Module that may cause the CT5 to fail ...