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HOMESERVICE MANUALSBUICK2010LUCERNE CXL, 3.9 MREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSAUTOMATIC TRANSMISSION - 4T65-E - REPAIR INSTRUCTIONS - ON VEHICLEREPAIR INSTRUCTIONS - ON VEHICLETRANSMISSION CONTROL MODULE REPLACEMENT
2010 Buick Lucerne CXL, 3.9 M

Transmission Control Module Replacement

2010 Buick Lucerne CXL, 3.9 MSECTION Transmission Control Module Replacement
Fig 1: Transmission Control Module
GM1685480Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Transmission Control Module (TCM)
Tip: 
  • Disconnect the TCM electrical connector.
  • A new TCM requires programming. Refer to Control Module References .
  • It is recommended that transmission adaptive pressure (TAP) information be reset. Resetting the TAP values using a scan tool will erase all learned values in all cells. As a result, the engine control module (ECM), powertrain control module (PCM) or TCM will need to relearn TAP values. Transmission performance may be affected as new TAP values are learned. Reset the TAP values.
  • Twisting or tilting of the transmission control module electrical connector while disconnecting may result in bent or misaligned electrical terminal pins.
2 TCM Bracket Nuts (Qty: 2)
CAUTION: Refer to Fastener Caution .

Tighten:  10 N.m (89 lb in)
3 TCM Bracket
Refer to Control Module References for programming and setup information.
RENDER: 1.0x

NO RELATED

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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.