Are you chasing electrical gremlins in your GM truck or van? Intermittent power windows, flickering dash lights, or a security system that randomly prevents your vehicle from starting are all classic signs of a failing Body Control Module (BCM). As the central nervous system for your vehicle’s comfort and convenience features, a faulty BCM can cause a host of frustrating and unpredictable problems. Stop throwing parts at the problem and get the definitive solution.
This is a direct-fit replacement Body Control Module, part number 15095334, for a wide range of 2002-2005 GM vehicles. The best part? We take care of the most difficult step for you. Before we ship it, our technicians will program the module with the latest GM software updates, specifically matched to your vehicle using the VIN you provide. This means no expensive trip to the dealership for programming. It arrives at your door ready for installation, saving you time, money, and headaches.
Case Study: A Tricky Diagnosis
I remember a 2002 Sierra 1500 that came into my bay with the owner at his wit’s end. The truck would randomly not start, the radio would cut out, and the power locks had a mind of their own. He had already replaced the battery and alternator. After connecting my scan tool, I noticed multiple communication error codes (U-codes) pointing to a network issue. By monitoring the data stream, I could see the BCM periodically dropping off the network. This confirmed my suspicion. We installed one of our pre-programmed modules, and all the bizarre electrical issues vanished instantly. It’s a common failure I’ve seen hundreds of times on these GMT800 platform trucks.
Is Your GM Vehicle Showing These Symptoms?
A failing BCM can manifest in many ways. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior dome lights or dash lights staying on or not working at all.
- ✔ The security or anti-theft light is illuminated, causing a no-start condition.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Communication error codes (like U0140) stored in other modules.
- ✔ Inconsistent radio or climate control operation.
A Straightforward Guide to BCM Installation
Replacing the BCM is a manageable job for a DIYer with basic tools. While locations vary, the process is similar. Always disconnect the battery before starting.
- Step 1: Locate the BCM. On most full-size trucks and SUVs (Sierra, Silverado, Tahoe, Yukon), it’s located under the driver’s side of the dashboard, near the steering column. On vans (Astro, Safari) and S-series trucks, it’s typically behind the center dash/glove box area.
- Step 2: Disconnect Connectors. Carefully release the locking tabs on the multiple electrical connectors and pull them straight out from the module. Do not force them.
- Step 3: Remove the Old Module. The BCM is usually held in place by a few small bolts or plastic clips. Remove the fasteners and take out the old module.
- Step 4: Install the New Module. Seat your new, pre-programmed BCM in the mounting bracket and secure it. Reconnect all electrical connectors, ensuring they click firmly into place.
- Step 5: Reconnect & Test. Reconnect the negative battery terminal. Turn the key to the ‘ON’ position and test all functions: windows, locks, lights, radio, etc.
Important Post-Installation Information
Because this module is central to many systems, a couple of additional steps may be required after installation, depending on your specific vehicle’s configuration:
- ✔ Airbag System Sync: If your airbag warning light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag module.
- ✔ Brake Pedal Position Relearn: Some models may require a brake pedal position sensor relearn to ensure proper brake light and traction control functionality. This also requires a capable diagnostic tool.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. It fits the following vehicles:
- 2002-2005 Chevrolet Astro / GMC Safari
- 2002-2005 Chevrolet Blazer S10 / GMC Jimmy S15
- 2002-2004 Chevrolet S10 / GMC Sonoma
- 2002 Chevrolet Avalanche 1500 (4×2)
- 2002 Cadillac Escalade (4×2)
- 2002 Chevrolet Silverado & GMC Sierra 1500, 2500, 3500
- 2002 GMC Sierra Denali
- 2002 Chevrolet Suburban & GMC Yukon XL 1500 (4×2), 2500
- 2002 Chevrolet Tahoe & GMC Yukon (4×2)
Note: Please verify your original part number or consult the detailed fitment list to ensure compatibility.
Frequently Asked Questions
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer that controls many of your vehicle’s non-engine related functions, such as power windows, locks, interior lighting, the security system, and the radio. It acts as a central hub for these electronic features.
How do I know this BCM will work for my vehicle?
We guarantee it will work. After you purchase, you provide us with your vehicle’s 17-digit VIN. Our technicians then program the BCM with the specific software and settings for your exact truck or van, ensuring seamless integration.
Do I need to do any programming myself?
No. The module arrives fully programmed and ready for installation. This saves you from needing expensive dealer-level scan tools or paying for programming services.
What if my airbag light is on after installation?
This can happen occasionally. It means the new BCM needs to be electronically ‘introduced’ to the airbag module (SDM). A repair shop with a professional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to resolve this.
Is there a core charge for my old part?
No, there is absolutely no core charge. You can keep your old module, so there’s nothing you need to send back to us.