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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 35 (Engine Mechanical - 6.6L - Introduction) >> Diagnostic Information and Procedures >> Drive Belt Falls Off Diagnosis >> Diagnostic Aids

Diagnostic Aids

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If the drive belt repeatedly falls off the accessory drive belt pulleys, this may be caused by a pulley misalignment.

An extra load that is quickly applied or released by an accessory drive component may cause the drive belt to fall off. Verify that the accessory drive components are operating properly.

If the drive belt is the incorrect length, the drive belt tensioner may not maintain the proper tension on the drive belt.

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