SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSBUICK2005LESABRE LIMITED, 4T65E/M15REPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - INTRODUCTIONREPAIR INSTRUCTIONSPOWERTRAIN CONTROL MODULE (PCM) REPLACEMENTREMOVAL PROCEDURE
2005 Buick LeSabre Limited, 4T65E/M15

Removal Procedure

2005 Buick LeSabre Limited, 4T65E/M15SECTION Removal Procedure
    IMPORTANT: It is necessary to record the remaining engine oil life. If the replacement module is not programed with the remaining engine oil life, the engine oil life will default to 100 percent. If the replacement module is not programmed with the remaining engine oil life, the engine oil will need to be changed at 5 000 km (3,000 mi) from the last engine oil change.
  1. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.
  2. Turn OFF the ignition.
  3. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  4. Remove the intake duct. Refer to Air Cleaner Intake Duct Replacement .
    5. Fig 1: View of Upper Air Cleaner Housing Assembly and Screws
    GM481272Courtesy of GENERAL MOTORS CORP.
  5. Remove the 2 screws (2) from the upper and lower air cleaner assembly sections.
  6. Remove the upper air cleaner housing assembly (1).
    7. Fig 2: View of PCM Connectors, PCM, and PCM Housing
    GM481275Courtesy of GENERAL MOTORS CORP.
  7. Without disconnecting the PCM connectors (1), remove the PCM (3) and harness from the PCM housing (2).
  8. Disconnect the PCM connectors (1).
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.