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Home >> GMC >> 2018 >> Terrain Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical - 1.5L (LYX)) >> Diagnostic Information And Procedures >> Engine Compression Test >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
    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. Engine OFF.
  3. Remove the spark plugs. Refer to Spark Plug Replacement .
  4. Interrupt the fuel supply.
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