Is Your GM SUV Plagued by Electrical Gremlins?
If you’re dealing with flickering lights, malfunctioning power windows, or a dashboard that has a mind of its own, a failing Body Control Module (BCM) is the most likely culprit. The BCM is the central command center for your vehicle’s body electronics, coordinating everything from your interior lights and power locks to the HVAC system and security features. When it starts to fail, it can cause a cascade of frustrating and unpredictable issues that can make your vehicle feel unreliable.
Expert Pro Tip
Expert Pro Tip
Before replacing your BCM, always perform a thorough check of your vehicle’s battery, alternator, and primary ground connections (especially the main chassis and engine grounds). Poor voltage or a weak ground can mimic BCM failure symptoms by causing erratic behavior in various electronic systems. A simple voltage drop test can save you from a misdiagnosis.
The Direct Solution for Your 2004-2005 Envoy XUV BCM
This isn’t just a replacement part; it’s a complete, plug-and-play solution. We take the guesswork and high dealership costs out of the equation. Simply provide us with your vehicle’s VIN during checkout, and our technicians will program this BCM with the latest official GM software specific to your Envoy XUV. This ensures that all the factory-installed options and features your vehicle came with will function correctly right out of thebox, restoring your vehicle to its original operating condition.
Common Symptoms of a Failing BCM
- ✔ Power windows, door locks, or mirrors operating intermittently or not at all.
- ✔ Interior or exterior lights staying on, flickering, or failing to turn on.
- ✔ The security system engaging randomly or preventing the vehicle from starting.
- ✔ Inconsistent or non-functional HVAC (heating and air conditioning) controls.
- ✔ Gauges on the instrument cluster behaving erratically or not working.
- ✔ Remote keyless entry (key fob) failing to lock or unlock the doors.
- ✔ Diagnostic trouble codes (especially U-codes) indicating a loss of communication with other modules.
Installation and Post-Install Syncing
Physically replacing the BCM is straightforward for those with moderate mechanical skill. It is typically located within the front fuse box area. However, because the BCM communicates with other critical safety systems, some post-installation procedures may be necessary to ensure full functionality and clear any warning lights.
Important Post-Installation Steps:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is required. This syncs the new BCM with the airbag’s Sensing and Diagnostic Module (SDM) and must be performed with a professional-grade diagnostic tool.
- Brake Pedal Position Relearn: To ensure proper brake light and traction control operation, a brake pedal position sensor recalibration might be needed. This procedure helps the BCM understand the exact position of the brake pedal.
We’ve simplified the process by pre-programming the module, which handles the most complex part of the job. Plus, there is no core charge, so you can keep your original module without the hassle of sending it back.
Guaranteed Fitment
This BCM is a direct replacement for the following part numbers:
- 15122670
- 15065293
- 15114669
- 15191621
- 9352135
It is confirmed to fit a wide range of GM SUVs from 2002-2005, including the Chevrolet Trailblazer, GMC Envoy (XL, XUV), Oldsmobile Bravada, Buick Rainier, Isuzu Ascender, and Saab 9-7X. Please verify your part number and vehicle model in the fitment list to ensure compatibility.
Frequently Asked Questions
Expert Pro Tip
Before replacing your BCM, always perform a thorough check of your vehicle’s battery, alternator, and primary ground connections (especially the main chassis and engine grounds). Poor voltage or a weak ground can mimic BCM failure symptoms by causing erratic behavior in various electronic systems. A simple voltage drop test can save you from a misdiagnosis.