K 2500 Yukon 4WD V8-6.0L VIN U (2000)
14. Replacing the drive belt when it is not damaged or there is not excessive pilling will only be a temporary repair.
Drive Belt Excessive Wear
Diagnostic Aids
Excessive wear on a drive belt(s) is usually caused by an incorrect installation or the wrong drive belt for the application.
Minor misalignment of the drive belt pulleys will not cause excessive wear, but will probably cause the drive belt(s) to make a noise or to fall off.
Excessive misalignment of the drive belt pulleys will cause excessive wear but may also make the drive belt(s) fall off.
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
2. The inspection is to verify the drive belt(s) is correctly installed on all of the drive belt pulleys. Wear on the drive belt(s) may be caused by
mix-positioning the drive belt(s) by one groove on a pulley.
3. The installation of a drive belt that is two wide or two narrow will cause wear on the drive belt. The drive belt ribs should match all of the grooves
on all of the pulleys.
4. This inspection is to verify the drive belt(s) is not contacting any parts of the engine or body while the engine is operating. There should be
sufficient clearance when the drive belt accessory drive components load varies. The drive belt(s) should not come in contact with an engine or a
body component when snapping the throttle.
Drive Belt Falls Off