Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2005TRAILBLAZER 4WD V8-5.3L VIN MREPAIR AND DIAGNOSISTESTING AND INSPECTIONPROGRAMMING AND RELEARNINGBODY CONTROL MODULE (BCM) - PROGRAMMING & SETUP
2005 Chevrolet TrailBlazer 4WD V8-5.3L VIN M
Body Control Module (BCM) - Programming & Setup
2005 Chevrolet TrailBlazer 4WD V8-5.3L VIN MSECTION Body Control Module (BCM) - Programming & Setup
BODY CONTROL MODULE PROGRAMMING AND SETUP
BODY CONTROL MODULE (BCM) REPLACEMENT
If the body control module (BCM) is replaced, the following procedures must be performed in the following order:
1. BCM Reprogramming-Refer to Body Control Module (BCM) Programming/RPO Configuration in Computer/Integrating Systems.
2. Theft Learn-Refer to Programming Theft Deterrent System Components in Theft Deterrent. A new BCM will learn the Passlock information automatically but the powertrain control module (PCM) must still learn the theft information from the BCM.
IMPORTANT: This procedure has to be performed only for vehicles equipped with Passlock System.
3. Relearn Restraints ID-Refer to Body Control Module (BCM) Programming/RPO Configuration in Computer/Integrating Systems.
BCM REPROGRAMMING
If the BCM is reprogrammed, the following procedures must be performed:
1. BCM Reprogramming-Refer to Body Control Module (BCM) Programming/RPO Configuration in Computer/Integrating Systems.
2. Theft Learn-Refer to Programming Theft Deterrent System Components in Theft Deterrent.
IMPORTANT: This procedure has to be performed only for vehicles equipped with Passlock System.
3. Relearn Restraints ID-Refer to Body Control Module (BCM) Programming/RPO Configuration in Computer/Integrating Systems.
INFLATABLE RESTRAINT SENSING AND DIAGNOSTIC MODULE (SDM) REPLACEMENT
If the sensing and diagnostic module (SDM) is replaced, the following procedure must be performed:
Relearn Restraints ID-Refer to Body Control Module (BCM) Programming/RPO Configuration in Computer/Integrating Systems.
PASSLOCK SENSOR REPLACEMENT
If the Passlock Sensor is replaced perform the theft learn procedure. Refer to Programming Theft Deterrent System Components in Theft Deterrent.
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.