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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)) >> Diagnostic Information and Procedures >> Engine Compression Test >> Removal Procedure

Removal Procedure

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    NOTE:

    The battery must be at or near full charge.

  1. Connect a battery charger to the battery for the duration of the test to maintain an adequate battery level.
  2. Turn the engine OFF.
  3. Spark Plug - Remove - Gas Engine Ignition Spark Plug Replacement
  4. Interrupt the fuel supply.