Skip the auto shop - Our mechanics make house calls

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

asked by on

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

A: Greetings! I will be happy to help. Your de...

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?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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

Q: my car starts and dies right after startup before I gear into drive. it doesn't always just occasionaly.

Hi there. It's probably a good idea for you to have one of our mobile mechanics come to your location and complete a car starts then dies inspection first, before you attempt any repairs or try to diagnose the issue....

Q: Air blowing warm

If there is an oily residue on one of the sides or corners of the condenser, then there is most likely a leak in the AC system. The system will need to be recovered, and leak-checked, to be sure. The...

Q: Engine? New car? Greedy mechanics? What's the real deal?

Hi there: We strive to take the high road here at YourMechanic.com. Without being there to inspect your 2004 Dodge Intrepid, it would be irresponsible for us to assume what might be wrong. However, if you're looking for a fair...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.