Brand: GM heat/ventilation troubles could be linked to ... the radios? - Minneapolis Star Tribune
I run the HVAC system in the “Auto” mode with the temperature set the same on both sides. Last winter with an outside temperature of 50 degrees F. and the system set to 72 degrees on both sides, the blower suddenly went to max speed with cold air from the dash and warm air from the floor vents. The dealer found several fault codes from the HVAC and the radio. After the fourth trip to the dealer, their suggestion was “don’t use the ‘Auto’ mode. In your case — after four tries — I’d suggest to the dealer that he ask for technical help from GM. From my ALLDATA database is GM’s service suggestion — plug in the scan tool, turn on the ignition and “verify every applicable scan tool switch... ” If any parameter does not change, replace the A20 Radio/HVAC Controls. Then, if you’re serious about giving the car to a teenager, have just the essential services done, such as brakes, oil/filter, air and fuel filters. com welcomes and encourages readers to comment and engage in substantive, mutually respectful exchanges over news topics. Commenters must follow our Terms of Use. Comments that violate the above will be removed. Repeat violators may lose their commenting privileges on StarTribune. Source: www.startribune.com
