Restore Full Control Over Your Vehicle’s Electronics
Are you battling a frustrating list of electrical gremlins in your GM truck, van, or SUV? Flickering lights, power windows with a mind of their own, a security system that won’t cooperate, or a dashboard that lights up with random warnings are all classic signs of a failing Body Control Module (BCM). As the central command for your vehicle’s body electronics, when the BCM falters, it can make your reliable vehicle feel unpredictable. I’ve seen it hundreds of times in my shop: a simple BCM failure causing symptoms that send owners chasing expensive, unnecessary repairs.
This isn’t just a replacement part; it’s a direct solution. We offer a dependable 2002-2005 GM BCM that arrives at your doorstep pre-programmed to your vehicle’s specific VIN. By providing us with your VIN at checkout, we flash the module with the latest official GM software updates. This critical step ensures all your vehicle’s original features work seamlessly upon installation, saving you a costly trip to the dealership for programming. Get back the reliability and functionality you depend on.
Case Study: A Tricky Diagnosis
A customer brought in his 2002 GMC Sierra 2500 last month with a truly baffling issue. The radio would turn on and off, the dome light would flicker while driving, and occasionally, the power locks would cycle on their own. He had already replaced the battery and checked the main grounds. Diagnostics showed no clear trouble codes pointing to one specific system. This intermittent, multi-system chaos is a textbook BCM failure. The internal circuits and solder joints on these modules can degrade over time from heat cycles and vibration, leading to these exact symptoms. We installed a VIN-programmed BCM, and within an hour, every single issue was resolved. It’s a fix I’ve performed on over 500 GM vehicles from this era, and it consistently restores the vehicle to perfect working order.
Common Signs of a Failing Body Control Module
If your vehicle is exhibiting any of these behaviors, a faulty BCM is the likely culprit. Replacing it can solve multiple problems at once.
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or don’t work at all.
- ✔ The security system or keyless entry malfunctioning or preventing the vehicle from starting.
- ✔ The horn sounding randomly or not working when pressed.
- ✔ False warnings on the instrument cluster (e.g., “Service Vehicle Soon”).
- ✔ Issues with windshield wiper operation.
Your Straightforward BCM Installation Guide
For the confident DIYer or professional mechanic, installing this 2002-2005 GM BCM is a manageable job. Following these steps carefully is key to a successful repair.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: On most of these vehicles, the BCM is located under the driver’s side of the dashboard, often near the steering column (for trucks/SUVs) or in the center dash area (for vans). Refer to your vehicle’s service manual for the exact location.
- Remove Trim Panels: You will likely need to remove a few plastic trim panels to gain access to the module. Take your time to avoid breaking any clips.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt the module from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all electrical connectors. Ensure they click into place.
- Post-Installation Procedures (CRITICAL): Reconnect the battery. After replacement, you MUST perform two key procedures with a compatible high-end scan tool:
1) Airbag System Reset: Perform the ‘Setup SDM Primary Key in BCM’ procedure to clear the airbag warning light.
2) Brake Pedal Calibration: Some vehicles require a brake pedal position sensor relearn. This is vital for proper brake light function and ABS performance.
Verified Fitment For Your GM Vehicle
This module is a direct replacement for part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. Please verify your part number or use our fitment guide below. This part is confirmed to fit the following models:
ESCALADE 2002 (4×2)
Chevrolet:
ASTRO 2002-2005
AVALANCHE 1500 2002 (4×2)
BLAZER S10 2002-2005
S10 PICKUP 2002-2004
SILVERADO 1500/2500/3500 PICKUP 2002
SUBURBAN 1500 2002 (4×2)
SUBURBAN 2500 2002
TAHOE 2002 (4×2)
GMC:
JIMMY S15 2002-2005
SAFARI 2002-2005
SIERRA 1500/2500/3500 PICKUP 2002
SIERRA DENALI 2002
SONOMA S15 2002-2004
YUKON 2002 (4×2)
YUKON XL 1500 2002 (4×2)
YUKON XL 2500 2002
Frequently Asked Questions
Do I need to do any programming after I receive this BCM?
No. This module comes fully programmed to your vehicle’s VIN with the latest GM software. You just need to perform the post-installation relearn procedures mentioned in the installation guide, which require a diagnostic tool.
What information do you need from me?
After you complete your purchase, you must provide us with your vehicle’s 17-digit VIN (Vehicle Identification Number). We cannot ship the part until we have this information to program it correctly.
Will this fix my ‘Service 4WD’ light?
A failing BCM can sometimes cause false warnings, but a ‘Service 4WD’ light is more commonly related to the Transfer Case Control Module (TCCM) or a sensor in the 4WD system. It’s best to have the codes scanned to be certain.
Is this a difficult part for a DIYer to replace?
The physical replacement is straightforward for someone with basic mechanical skills. The challenge lies in the post-installation electronic procedures (airbag and brake relearn), which require a bi-directional scan tool. If you don’t have access to one, you may need assistance from a local shop to complete the job.
My original part number isn’t listed, but my vehicle is. Will it fit?
It’s crucial to match the part number. GM used many different BCMs. If your part number is not one of these (15063578, 15081796, 15095334, 19208537, DKAK, DPNU), this module will likely not work for your vehicle. Please double-check the number on your original BCM.