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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1153 (Front Drive Axle) >> Diagnostic Information and Procedures >> Front Axle Lubricant Leak Diagnosis

Front Axle Lubricant Leak Diagnosis

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
Cause Correction
IMPORTANT: Upon completion of all repairs, refill the axle with the proper amounts of axle lubricant. Refer to Front Axle Lubricant Level Inspection  and Lubrication Specifications .
Restricted or damaged vent valve assembly Repair or replace the vent valve as required.
Right side cover O-ring seal Replace the side cover O-ring seal as required.
Worn or damaged axle shaft oil seals Replace the axle shaft oil seals as required.
Housing or side cover porosity Replace the carrier. Refer to Differential Carrier Assembly Replacement .
Loose Drain or Fill Plug Tighten to specification
Pinion Housing Assembly O-ring
  • Pull Housing Assembly
  • Replace O-ring
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