Is Your GM Truck or SUV Plagued by Bizarre Electrical Problems?
If you’re dealing with flickering lights, a malfunctioning security system, unresponsive power windows, or erratic HVAC controls in your 2002-2007 GM vehicle, a failing Body Control Module (BCM) is the most likely culprit. The BCM is the electronic brain that coordinates your vehicle’s body-related comfort and security features. When it fails, it can cause a cascade of frustrating and difficult-to-diagnose issues, often leading to incorrect replacement of other components.
From the Diagnostic Bay
We had a 2005 Silverado 2500 in the shop that was a real head-scratcher. The owner had already replaced the battery and alternator, but the truck would intermittently refuse to start, and the radio and dash lights would act possessed. After ruling out grounding issues, we connected our scanner and found a slew of communication DTCs all pointing back to one component: the BCM. Instead of a costly trip to the dealership for diagnostics and programming, we installed one of our VIN-programmed modules. The truck fired right up, all electrical gremlins were gone, and the customer was back on the road in under an hour.
Symptoms of a Failing GM Body Control Module
- ✔ Non-functional or intermittent power windows, door locks, or interior/exterior lighting.
- ✔ HVAC system failures, such as a blower motor that won’t turn on or stays stuck on one speed.
- ✔ An active airbag warning light, often accompanied by diagnostic trouble code B1001.
- ✔ Security system malfunctions, causing no-start conditions or false alarms.
- ✔ Inconsistent windshield wiper operation.
- ✔ Communication errors with other vehicle modules, leading to a variety of warning lights.
Your Direct Solution: The 2003-2006 Avalanche BCM
This OEM-quality Body Control Module is the definitive solution for restoring your vehicle’s electronic functions. The most significant benefit is our complimentary VIN programming service. We flash the module with your vehicle’s specific VIN and the latest GM software updates before it ships. This ensures it arrives ready for a true plug-and-play installation, eliminating the need for expensive dealership programming or specialized scan tools for setup. It’s designed to be a direct replacement for a wide range of popular GM trucks and SUVs, including the Chevrolet Silverado, Tahoe, Suburban, GMC Sierra, Yukon, Cadillac Escalade, and Hummer H2.
Installation and Post-Install Considerations
Installation is straightforward for any DIYer with basic tools. The BCM is typically located under the driver’s side dash, near the steering column. Simply disconnect the battery, unbolt the old module, disconnect the electrical harnesses, and plug in the new one. While our programming handles the primary setup, some vehicles may require a ‘Setup SDM Primary Key in BCM’ procedure with a professional scan tool if the airbag light remains on. This syncs the new BCM with the airbag system. There is no core charge, so you can keep your old part without any hassle.
Guaranteed Compatibility
This module is a direct replacement for multiple part numbers, ensuring a perfect fit and function. It interchanges with part numbers: 10383536, 15116066, 15136225, 15136877, 15137393, 15137394, 15137395, 15137396, 15198116, 15257043, 15257044, 15257045, 15257046, 10367690, 15064149, and 15194170.
Frequently Asked Questions
What exactly does the Body Control Module do?
The BCM acts as the central computer for your vehicle’s body electronics. It controls non-engine related functions like your lights, power windows and locks, security system, wipers, and climate controls.
Is this part really plug-and-play?
Yes. We program the module to your vehicle’s VIN before shipping. This means it’s ready to be installed and function correctly without requiring a trip to the dealership for additional programming, saving you time and money.
What if my airbag light is on after I install the new BCM?
In some cases, the new BCM needs to be electronically introduced to the airbag system (SDM). This is done via a ‘Setup SDM Primary Key in BCM’ procedure, which requires a professional-grade diagnostic tool. This is only necessary if the light appears after installation.
Where is the BCM located on my 2005 GMC Sierra?
On most 2003-2007 GM trucks and SUVs like the Sierra, Silverado, and Tahoe, the BCM is located under the driver’s side of the dashboard, typically to the left of the steering column.
Do I need to send my old BCM back?
No. There is no core charge or deposit required for this part. You can keep your old module without any obligation.