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Home >> GMC >> 2018 >> Terrain Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Mechanical - 1.6L (LH7) Diesel) >> Diagnostic Information And Procedures >> Engine Compression Test >> Preliminary Procedures

Preliminary Procedures

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  1. Remove Fuel Injector. Refer to Fuel Injector Replacement
  2. Remove Fuel Pump Relay
  3. WARNING:

    Refer to Eye Protection Warning

  4. Crank the engine with the starter motor for 5 seconds to remove any foreign substances from the cylinders.