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For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 Yukon XL - 4WD 🢒 Bulletins 🢒 Propane Sulfur Or Foul Odor From The Rear Differential - keywords axle fluid vent

Propane Sulfur Or Foul Odor From The Rear Differential - keywords axle fluid vent

Subject:Propane, Sulfur or Foul Odor from the Rear Differential

Models:2007 Cadillac Escalade, Escalade ESV, Escalade EXT
2007 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2007 GMC Sierra, Yukon, Yukon XL


The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:

Odor or repeat odor from the rear differential with no other noise symptoms.

Recommendation/Instructions:
  1. Drain and disassemble the rear differential by removing the gear case and axle shafts.
  2. Clean the rear differential completely with a suitable solvent make sure the housing is clean and dry prior to reassembly.
  3. Replace the rear differential vent hose and cap.
  4. Relocate the vent to either near the spare tire or evap canister area.
  5. Cut the new vent hose approximately 6 inches from the vent cap end and install filter part number 5651682, secure the filter with clamps supplied.
  6. Fill the differential with the appropriate fluid listed in eSI

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.