Is your GM truck or SUV experiencing bizarre electrical problems? Flickering lights, power accessories with a mind of their own, or a security system that prevents your vehicle from starting are all classic symptoms of a failing Body Control Module (BCM). The BCM is the central hub for your vehicle’s body electronics, and when it fails, it can cause a cascade of frustrating and difficult-to-diagnose issues. This isn’t just a replacement part; it’s a complete, ready-to-install solution for your vehicle.
From the Diagnostic Bay
We once had a 2002 GMC Sierra in the shop that was driving its owner crazy. The battery would be dead every single morning. We checked for parasitic draws, tested the alternator, and even put in a new battery, but the problem persisted. Finally, we pointed a thermal camera at the fuse block area with the truck off and saw the BCM glowing faintly. It had an internal short, creating a constant power drain that was just enough to kill the battery overnight. Swapping in a correctly programmed BCM resolved the issue completely. These modules can fail in very subtle ways.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior dome lights or exterior headlights/taillights staying on or not turning on at all.
- ✔ The security or anti-theft light is illuminated, causing a no-start condition.
- ✔ Horn honking randomly or not working when pressed.
- ✔ Windshield wipers activating on their own or not responding to the switch.
- ✔ Unexplained battery drain that leaves you stranded.
- ✔ False warnings on the driver information center, like “Service Vehicle Soon”.
The Reliable Solution: A Pre-Programmed GM BCM 15063578
Don’t let a faulty module keep your truck off the road. We make the repair process simple. This genuine OEM-quality Body Control Module is meticulously tested and programmed with the latest GM software updates specifically for your vehicle. Simply provide us with your Vehicle Identification Number (VIN) during checkout, and our experts will flash the module to match your vehicle’s exact configuration. This eliminates the need for expensive dealership programming and specialized tools, making it a true plug-and-play repair.
Post-Installation Information
While our programming handles the critical functions, some GM vehicles require simple relearn procedures after the new BCM is installed. These may include:
- Airbag System Sync: If the 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 system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary to ensure correct brake light and traction control operation.
Always consult a factory service manual or a qualified technician for vehicle-specific procedures.
YUKON 02 Body Control (BCM); (under steering column), 4×2
BLAZER S10/JIMMY S15 02 Body Control (BCM); (center dash), ID 15063578
BLAZER S10/JIMMY S15 03-05 Body Control (BCM); (center dash)
SILVERADO 3500 PICKUP 02 Body Control (BCM); (under steering column)
SIERRA 3500 PICKUP 02 Body Control (BCM); (under steering column)
SIERRA 2500 PICKUP 02 Body Control (BCM); (under steering column)
S10/S15/SONOMA 03-04 Body Control (BCM)
SAFARI (GMC) 02-03 Body Control (BCM); (center dash), ID 15095334
SAFARI (GMC) 04-05 Body Control (BCM); (center dash)
ESCALADE 02 Body Control (BCM); (under steering column), 4×2
SUBURBAN 2500 02 Body Control (BCM); (under steering column)
ASTRO 02-03 Body Control (BCM); (center dash), ID 15063578
SILVERADO 2500 PICKUP 02 Body Control (BCM); (under steering column)
SIERRA 1500 PICKUP 02 Body Control (BCM); (under steering column)
YUKON XL 1500 02 Body Control (BCM); (under steering column), 4×2
AVALANCHE 1500 02 Body Control (BCM); (under steering column), 4×2
BLAZER S10/JIMMY S15 02 Body Control (BCM); (center dash), ID 15085334
SUBURBAN 1500 02 Body Control (BCM); (under steering column), 4×2
YUKON XL 2500 02 Body Control (BCM); (under steering column)
ASTRO 04-05 Body Control (BCM); (center dash)
SAFARI (GMC) 02-03 Body Control (BCM); (center dash), ID 15081796
S10/S15/SONOMA 02 Body Control (BCM); (center dash), ID 15063578
BLAZER S10/JIMMY S15 02 Body Control (BCM); (center dash), ID 15081796
S10/S15/SONOMA 02 Body Control (BCM); (center dash), ID 15095334
S10/S15/SONOMA 02 Body Control (BCM); (center dash), ID 15081796
SAFARI (GMC) 02-03 Body Control (BCM); (center dash), ID 15063578
SIERRA DENALI 02 Body Control (BCM); (under steering column)
SILVERADO 1500 PICKUP 02 Body Control (BCM); (under steering column)
TAHOE 02 Body Control (BCM); (under steering column), 4×2
ASTRO 02-03 Body Control (BCM); (center dash), ID 15095334
Frequently Asked Questions
Why do you need my VIN?
Your vehicle’s VIN allows us to program the BCM with the specific software and settings for your exact model, year, and options. This ensures compatibility and proper function without needing a trip to the dealer.
Is this BCM difficult to install?
For most DIYers with basic tools, the installation is straightforward. The BCM is typically located under the steering column or in the center dash. The main challenge is accessing it. Since we pre-program the unit, the electronic part of the job is already done for you.
What happens if my airbag light comes on after installation?
This is a known possibility on some GM vehicles. It means the new BCM needs to be electronically ‘introduced’ to the airbag’s computer (SDM). This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the systems.
Will this fix my intermittent starting problem?
A failing BCM is a very common cause of intermittent no-start issues, especially if the security light is on. By controlling the Passlock/Passkey anti-theft system, a bad BCM can prevent the vehicle from starting. This part is the correct fix for that issue.
Do I need to send my old part back?
No. This purchase has no core charge. You can keep your original module.