K 1500 Yukon 4WD V8-5.3L VIN Z Flex Fuel (2003)
Drive Belt Chirping Diagnosis
Test Description
The number(s) below refer to the step(s) in the diagnostic table.
2. The chirping noise may not be engine related. This step is to verify that the engine is making the noise. If the engine is not making the noise do not
proceed any further in this table.
3. The noise may be an internal engine noise. Remove the drive belt(s) and operate the engine for a few seconds, this will verify if the chirping noise
is related to the drive belt(s) or not. With the drive belt(s) removed the water pump will not operate and the engine may overheat. Also Diagnostic
Trouble Codes (DTCs) may set when the engine is operated with the drive belt(s) removed.
4. Inspect the drive belt(s) for signs of pilling. Pilling is the small balls, pills, or strings in the drive bed grooves caused by the accumulation of
rubber dust.
6. Misalignment of the accessory drive pulley(s) may be caused from improper mounting or incorrect installation of an accessory drive component,
