Restore Your GM Truck’s Electrical System with a Plug-and-Play Solution
Are you chasing electrical gremlins in your 2002 Chevy Tahoe, Silverado, or other GM vehicle? Flickering interior lights, power windows with a mind of their own, a security light that won’t turn off, or even a no-start condition can all point to one central component: a failing Body Control Module (BCM). The BCM is the electronic brain for your vehicle’s comfort and security features. When it starts to fail, it can create a cascade of frustrating and seemingly unrelated problems. Stop swapping relays and checking fuses—this is the definitive fix you’ve been looking for.
This isn’t just a replacement part; it’s a complete solution. We take a genuine GM-spec BCM and program it with the latest official software, specifically coded to your vehicle’s unique VIN. This critical step ensures all your factory options work correctly right out of the box, eliminating the need for an expensive trip to the dealership for programming. You get a reliable, updated module that’s ready for installation the moment it arrives.
From the Diagnostic Bay
I remember a 2002 Silverado 2500 that came into my shop with a bizarre list of complaints. The radio would randomly shut off, the dome light would stay on, and the power locks only worked from the passenger side. The owner had spent a month replacing the lock actuators and the radio head unit with no success. After hooking up my scan tool, I saw a slew of communication errors (U-codes) all pointing back to the BCM. The internal logic was failing, sending corrupt data across the network. We installed a VIN-programmed 2002 Tahoe Body Control Module (the same unit fits the Silverado), and every single issue was resolved instantly. It’s a classic case of one single part causing system-wide chaos.
Is Your Vehicle Showing These Symptoms?
- ✔ Intermittent or non-functional power windows, locks, or mirrors.
- ✔ Erratic interior or exterior lighting behavior (e.g., lights staying on or not turning on).
- ✔ The security or anti-theft system light is on, preventing the engine from starting.
- ✔ Dashboard warning lights illuminating for no apparent reason.
- ✔ Inconsistent operation of the radio or climate controls.
- ✔ Communication-related Diagnostic Trouble Codes (DTCs), such as U0140, U0155, or B1001.
- ✔ A vehicle that won’t crank despite having a fully charged battery.
A Straightforward Guide to Your BCM Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes for the system capacitors to discharge.
- ✔ Locate the BCM: On most trucks and SUVs like the Tahoe or Silverado, the BCM is located under the driver’s side of the dashboard, near the steering column. On vans like the Astro/Safari, it’s often behind the center dash. Refer to a service manual for the exact location.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old BCM from its mounting bracket.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in the same location. Securely plug in all the electrical connectors, ensuring they click into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, radio, etc.—to confirm proper operation.
Important Post-Installation Notes
While this 2002 Tahoe Body Control Module is designed for a simple installation, some vehicles may require additional steps to sync with other onboard systems. Please be aware of the following:
- Airbag System Sync: If your airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a compatible professional scan tool. This syncs the BCM with the airbag module.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be needed to ensure correct brake light and traction control functionality.
- No Core Charge: We make it simple. There is no core charge for this part. You can keep your old module.
Will This Fit My GM Vehicle?
This module is a direct replacement for a wide range of GM trucks, vans, and SUVs. It replaces part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. Please verify your vehicle is on the list below and that the location and drive type (where specified) match your configuration.
AVALANCHE 1500 02 Body Control (BCM); (under steering column), 4×2
BLAZER S10/JIMMY S15 02-05 Body Control (BCM); (center dash)
ESCALADE 02 Body Control (BCM); (under steering column), 4×2
S10/S15/SONOMA 02-04 Body Control (BCM); (center dash)
SAFARI (GMC) 02-05 Body Control (BCM); (center dash)
SIERRA 1500/2500/3500 PICKUP 02 Body Control (BCM); (under steering column)
SIERRA DENALI 02 Body Control (BCM); (under steering column)
SILVERADO 1500/2500/3500 PICKUP 02 Body Control (BCM); (under steering column)
SUBURBAN 1500/2500 02 Body Control (BCM); (under steering column)
TAHOE 02 Body Control (BCM); (under steering column), 4×2
YUKON 02 Body Control (BCM); (under steering column), 4×2
YUKON XL 1500/2500 02 Body Control (BCM); (under steering column)
Frequently Asked Questions
Do I need to send you my VIN?
Yes, providing your Vehicle Identification Number (VIN) is essential. We use your VIN to program the BCM with the correct software and vehicle-specific options from GM, ensuring it works correctly upon installation.
Is this a plug-and-play part?
Yes, because we program it to your VIN before shipping, it is a plug-and-play installation for most vehicles. However, as noted, some models may require an airbag sync or brake pedal relearn procedure with a scan tool if related warning lights appear.
What happens if I install it and the airbag light comes on?
This means the BCM needs to be electronically ‘introduced’ to your vehicle’s airbag system (SDM). A qualified mechanic with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to resolve this.
Will this fix my no-start problem?
If your no-start issue is caused by the factory anti-theft system (Passlock) being triggered by a faulty BCM, then yes, this will resolve the problem. The security information is part of the VIN-specific programming we perform.
Do I need to return my old BCM?
No, there is absolutely no core charge or need to return your original module. You can keep it or dispose of it.