Is Your GM SUV Experiencing Strange Electrical Issues?
If your 2002-2005 Chevrolet Trailblazer, GMC Envoy, Oldsmobile Bravada, or other compatible GM SUV is suffering from erratic power windows, malfunctioning door locks, intermittent interior lights, or other bizarre electrical gremlins, a failing Body Control Module (BCM) is the most likely culprit. The BCM acts as the central nervous system for your vehicle’s body electronics, and when it begins to fail, it can cause a wide range of frustrating and unpredictable problems. Don’t let a faulty module compromise your vehicle’s functionality and convenience.
The Direct-Fit, Programmed Solution
This replacement Body Control Module is the definitive solution to restore your vehicle’s electronic systems to perfect working order. We take the guesswork and hassle out of the repair process. Simply provide us with your vehicle’s VIN (Vehicle Identification Number) during checkout, and our technicians will program the module with the latest GM software specific to your exact vehicle configuration. This means no expensive trips to the dealership for coding or flashing. The module arrives at your door ready for installation, making this a truly plug-and-play repair.
From the Diagnostic Bay
We once had a 2004 GMC Envoy come into the shop where the owner had spent hundreds of dollars replacing the driver’s side window motor and switch, yet the window still wouldn’t work. He was convinced the wiring was bad. After a quick scan, we found communication faults with the BCM. The original BCM had an internal failure on the driver’s door circuit. We installed a pre-programmed BCM, and instantly the window, locks, and mirror all started working perfectly. It’s a classic case of symptoms pointing to one part, while the root cause lies with the central controller.
Symptoms of a Failing Trailblazer Envoy BCM
- ✔ Power windows or locks operating intermittently or not at all.
- ✔ Interior dome lights staying on or not turning on.
- ✔ Erratic or non-functional dashboard gauges.
- ✔ Radio or climate control issues.
- ✔ Key fob not working to lock or unlock doors.
- ✔ False security system alarms or warnings.
- ✔ Unexplained battery drain when the vehicle is off.
Installation and Post-Install Notes
This BCM is typically located on the side of the front interior fuse box. Installation is straightforward for those with basic mechanical skills. After installation, most vehicles will function perfectly. However, in some cases, additional synchronization procedures may be required:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a professional-grade scan tool. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor recalibration to ensure proper brake light and traction control operation.
This module is a direct replacement for part numbers: 15122670, 15065293, 15114669, 15191621, and 9352135. Best of all, there is no core charge. You can keep your original module.
Frequently Asked Questions
Do I need to have this BCM programmed by a dealer?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN when you order, and the module will arrive ready to install.
What tools are needed for installation?
Basic hand tools, such as a socket set and screwdrivers, are typically all that’s required to access and replace the BCM, which is located near the interior fuse panel.
Will this fix my power window and door lock problems?
If the Body Control Module is the cause of the failure, then yes, this part will resolve those issues. The symptoms listed on this page are the most common indicators of a faulty BCM.
What happens if the airbag light comes on after I install it?
This indicates the new BCM needs to be synchronized with your vehicle’s airbag module (SDM). A technician with a professional scan tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to clear the light.
Is there a core charge for my old part?
No, there is no core charge. You are not required to send your old BCM back to us.