Q: AC light on dash
The AC light flashes on the dashboard, and the vent blows warm air instead of cold.
Recommended Services
| Heating AC Inspection | $94.99 - $114.99 | Get a Quote |
GM has a TSB out for this issue. If the system is full, then the negative battery terminal needs to be disconnected to reset the climate control computer. If the system does not work after this, then gauges will need to be put on, and an AC performance check run, to guide the diagnosis. You may want to enlist the help of a mechanic, such as one from YourMechanic, who has the equipment, training, and certification to inspect and diagnose the issues with your AC system.
The statements expressed above are only for informational purposes and should be independently verified. Please see our
terms of service
for more details
Get an instant quote for your car
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
What others are asking
How do I import a wallpaper for the multi-information screen?
You can select a custom wallpaper to be the backdrop for the multi-information display screen. To import a wallpaper into the multi-information display screen, you will first have to have imported a wallpaper from a USB port. Then, follow these...
Vehicle dies when I give it gas.
The vehicle may have more than one problem causing this problem. These problems were from things like the coolant sensor giving false readings, engine control modules failing, throttle position sensors failing and the mass air flow sensors failing. All of...
ABS light won't go off
The ABS system monitors the wheel speed sensors. When one or more wheels seem to be off from where they should be the ABS system modulates the chosen wheels brakes in order to match the speed of the others. If...
Hood not closing properly
If the hood opened while driving, it is most likely that the hood hinges have been damaged, or misaligned at the very least. The hood itself may have some structural damage. You may want to have a mechanic, such as...
Side vents not blowing air
Check to see if the air is blowing out of the floor vents in the rear? If they are, then you have a bad rear air diverter actuator in the back on the evaporator case. If there are no blowers...
Crunching / cracking sound when turning sharp right at low speeds
The noise is most likely an outer axle joint (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-axle-cv-shaft-assembly). The joint that makes the noise when turning right will be the right or passenger side axle (https://www.yourmechanic.com/services/axle-cv-shaft-assembly-replacement). If it was turning left and the noise happens then the noise...
Self start not working in my motorcycle
Unfortunately, YourMechanic is a mobile automotive service based around the maintenance and repair of mainly cars and trucks. However, if you have a remote start on your motorcycle, it is possible that the keyfob battery is dead. It is also...
Why won't it start with a low battery and a good jump start connection?
Hi, thanks for writing in. Your battery may not have had enough cold cranking amps (CCA). The volts may be correct but if it doesn't have enough CCA, it will not start for you. Batteries that specify cold cranking amps...
Car cranks, but won't turn over
There is a number of tests that would need to be done on this vehicle to narrow the problem down to an ignition, computer or fuel system problem. Have a mechanic like one from YourMechanic come and test the computer...
Related articles
The Best Used Cars to Buy If You’re Over Six Feet Tall
While While shorter than average drivers can have a tough time finding the right car, it’s equally hard for taller drivers, perhaps more so. If you’re feeling squished, or have to hunch over the wheel to drive, then you’re not...
How to Recharge Your Car Air Conditioning
Car AC refrigerant has to be recharged occasionally. Add more refrigerant to your AC system to keep your car cool in hot weather.
How to Get GMC Dealership Certified
GMC car dealerships offer automotive technician jobs to mechanics who are certified through one of the many programs they have available.
Browse other content
Services
Maintenance