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HOMESERVICE MANUALSBUICK2010LUCERNE CXL, 3.9 1REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 33 (PROGRAMMING AND SETUP - ALL SYSTEMS)REPAIR INSTRUCTIONSENGINE CONTROL MODULE PROGRAMMING AND SETUPECM REPLACEMENT
2010 Buick Lucerne CXL, 3.9 1

ECM Replacement

2010 Buick Lucerne CXL, 3.9 1SECTION ECM Replacement
WARNING: This page is about a different car, the 2010 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

If the engine control module (ECM) is replaced, the following procedures must be performed:

  1. ECM Reprogramming-Refer to Service Programming System (SPS) .
  2. The CKP System Variation Learn-Refer to Crankshaft Position System Variation Learn for the 3.5L engine or Crankshaft Position System Variation Learn for the 3.9L engine.
  3. The Throttle/Idle Learn procedure-Refer to Throttle/Idle Learn for the 3.5L or Throttle/Idle Learn for the 3.9L
  4. Fuel Composition Diagnosis-Refer to Fuel Composition Diagnosis for the 3.5L (LZE) engine or Fuel Composition Diagnosis for the 3.9L (LGD) engine.
  5. Engine Oil Life Remaining-When available, use a scan tool to reset the Engine Oil Life Remaining back to the original percentage recorded before the module was replaced.
  6. Transmission Fluid Life Remaining-When available, use the scan tool to reset the Transmission Fluid Life Remaining back to the original percentage recorded before the module was replaced.
  7. Theft Deterrent-Refer to Immobilizer System Component Programming .
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.