Q: Car whistling and shaking when driving and running the AC

asked by on February 19, 2016

My car is making a whistling noise and shaking when I drive and run the air conditioner at the same time.

Greetings! I will be happy to help. Your description leads me to believe that both of your issues could relate to your serpentine belt. The belt wears out over time, and will at times try to notify the driver of an issue by making a whistling or a squeaking sound. The AC system is belt-driven, so an issue with the belt could cause problems in its performance, such as a shake. However, most of the AC system’s vibrations should be absorbed by the motor mounts, so you should not be experiencing too much shake behind the steering wheel, unless the motor mounts are faulty. Therefore, I also suggest checking the motor mounts for wear and deterioration; factory motor mounts are made of rubber and the rubber insulation becomes brittle over time.

A good place to start is by having a certified mechanic, such as one from YourMechanic, come out to the location of your Pontiac to run an inspection on your AC system, and replace your serpentine belt, if deemed necessary.

Was this answer helpful?
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

Get a quote

What others are asking

Vehicle is squeaking upin start or when super cold

Hello, thank you for writing in. The vehicle is likely having a couple of separate issues. The squealing when cold is typically caused by the belts being cold and brittle after sitting for a while in chilly conditions. You will...

The car will start but does not move in drive or reverse, makes humming noise.

Hi there. First check the brake system and see if the brakes are stuck on. If the brakes are not stuck on, then the transmission may have low fluid. Check the transmission fluid level and see if its full and...

Intermittently, gas pedal sticks and car keeps accelerating

This can be caused by a variety of things. I would agree with the dealer that floor mats can often times interfere with the pedals in a car. The other thing I would be sure to check is the cruise...

Related articles

What Is the Difference Between Climate Control and Air Conditioning
It’s It’s important to be able to control the temperature inside your car’s cabin. During the summer, you need air conditioning to ensure comfort and safety, and during the winter, you’ll need heat for the same reason. However, different cars...
How Long Does an AC Belt Last?
Your Your AC belt connects the crankshaft of your car’s engine to the air conditioning unit, delivering cool air to you in hot weather, and also working to defrost your windows when the temperature drops. Depending on the type of...
How Long Does an AC High Pressure Hose Last?
Your Your car’s AC system works very much like your home’s air conditioning in that it uses a refrigerant to hold heat and then to deliver cool air. Depending on the amount of pressure the refrigerant is under, it will...