Q: after replacing belt, idler pulley, and tensioner pulley tahoe still sqeaks in the morning?

asked by on May 24, 2017

My mechanic had me replace the serpentine belt, the idler pulley, and the tensioner pulley but my tahoe still squeaks int he morning as though it has a belt issue. It stops once it has warmed up (dew has dried off). What else could it be? It doesn't get louder as i am driving or accelerating(like a drive shaft would do), it does it in idle as well as when driving (like as though I needed to replace the belt.)

My car has 150000 miles.
My car has an automatic transmission.

At the next cold start, try this: Take a spray bottle with some water and spray the belt then start it. If you hear the noise, then the problem may not be with the belt or tensioner. If you do hear it, then it’s possible that one of the pulleys (a/c,water pump,etc) may be slightly glazed or out of round. It’s also possible that a bearing, such as in the water pump, alternator, or a/c compressor clutch may be the issue. Sometimes a bearing that is on it’s way to failure can squeal when cold until it warms up. Alternator bearings are a common source. A mechanics stethoscope may be a good tool to locate a squealing sound. Since the noise is primarily on a cold start, the vehicle may need to sit for several hours or even overnight to get the noise to occur and found with the stethoscope.

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

When accelerating, car jerks back and forth - 1995 Chevrolet Beretta

This is not a safe condition under which to continue driving. If you have any warranty options with the dealer you purchased the car from, go back to the dealer, and seek satisfactory repairs that eliminate this condition. If that...

Check Engine Light is on. P0430 code.

The Check Engine Light on for code P0430 is for the right (passenger side) O2 sensor indicating a bad catalyst on the passenger side or right side of the vehicle. Before replacing the catalyst, check all the engine ground connections...

I had struts replaced and was told they are bad. What could cause that?

Strut service life, in miles, is somewhat variable due to differences in product quality, vehicle operating conditions, and so forth. However, if a strut fails prior to 50,000 miles of service, the causes are typically: 1) product/design/manufacturing defect; 2) extreme...

Related articles

2012 Subaru Outback vs. 2012 Chevrolet Impala: Which One Should I Buy?
When you compare a 4-door sedan versus a 4-door wagon, there are going to be some obvious differences. Even though the Outback looks car-like, the ride, the handling, and the mileage are going to make it more similar to an...
The Best Used Cars to Buy If You Love Road Trips
If If you love to travel, comfort is very important in a vehicle. You want a nice, quiet ride, comfortable seating, and enough room. We have evaluated several used vehicles, and narrowed our favorite road trip vehicles down to the...
A Buyer’s Guide to the 2012 Chevrolet Tahoe Hybrid
Chevrolet Chevrolet has always had a good name when it comes to the vehicles they make, and that is doubly true for their SUVs. The 2012 Chevrolet Tahoe Hybrid has all of the great features that you would want from...