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Home >> Chevrolet >> 2021 >> Trailblazer RS, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Mechanical - 1.2L (LIH)) >> Repair Instructions >> Lower Crankcase Extension Cleaning and Inspection

Lower Crankcase Extension Cleaning and Inspection

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  1. GM5282922Courtesy of GENERAL MOTORS COMPANY

    Clean the lower crankcase extension mating surface.

  2. Clean the lower crankcase extension (1). Remove all the sludge and the oil deposits.
  3. Inspect all threads.
  4. Inspect the lower crankcase extension for cracking near the transmission mounting points.
  5. Inspect the lower crankcase extension for cracking resulting from impact or flying road debris.
  6. Repair or replace the lower crankcase extension as necessary.