GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1999 🢒 Corvette 🢒 Engine 🢒 Engine Mechanical - 5.7L 🢒 Drive Belt Squeal Diagnosis

Step

Action

Yes

No

Notice: Do not use belt dressing on the drive belt. Belt dressing causes the breakdown of the composition of the drive belt. Failure to follow this recommendation will damage the drive belt.

DEFINITION: The following items are indications of squeal:

    • A loud screeching noise that is caused by a slipping drive belt (this is unusual for a drive belt with multiple ribs)
    • The noise occurs when a heavy load is applied to the drive belt, such as an air conditioning compressor engagement snapping the throttle, or slipping on a seized pulley.

1

Check for a misaligned pulley.

Is there a pulley misaligned?

Go to Step 3

Go to Step 2

2

Check for correct drive belt length. Refer to Drive Belt Replacement

Is the drive belt the correct length?

Go to Step 4

Go to Step 5

3

Repair or replace with new parts as necessary.

Is the repair complete?

System OK

--

4

Check the drive belt tensioner for proper operation. Refer to Drive Belt Tensioner Diagnosis .

Is the drive belt tensioner operating correctly?

Go to Step 3

Go to Step 5

5

Check for correct pulley size.

Are the pulleys the correct size?

Go to Step 6

Go to Step 3

6

Check for seized bearings.

Is there a seized bearing?

Go to Step 3

System OK