2012 Duramax no heat
A few weeks ago I had no heat on the highway. Drove over 300 miles and Luke warm. Engine temp gauge looked normal. Diagnostics scan showed a code that dealer told to change the thermostat. After findi...
Forum Discussion
You didn't mention if you have the manual or auto temp controls? If auto it could be the aspirator is failed.
What codes did you have?
What codes did you have?
