Yukon XL 2500 2WD V8-8.1L VIN G (2004)
Drive Belt Tensioner: Testing and Inspection
Drive Belt Tensioner Diagnosis
Notice: Allowing the drive belt tensioner to snap into the free position may result in damage to the tensioner.
1. Remove the drive belt(s). Refer to Drive Belt Replacement - Accessory or Drive Belt Replacement - Air Conditioning. See: Drive Belt/Service and
Repair
2. Position a hex-head socket on the belt tensioner pulley bolt head.
3. Move the drive belt tensioner through its full travel.
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The movement should feel smooth.
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There should be no binding.
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The tensioner should return freely.
4. If any binding is observed, replace the drive belt tensioner(s).
5. Install the drive belt(s).
