If you’re dealing with baffling electrical problems in your 2000 GM truck or SUV—like power windows with a mind of their own, flickering interior lights, or a security system that won’t cooperate—you’ve likely pinpointed the culprit: a failing Body Control Module (BCM). As a technician with over two decades of experience, I’ve seen how a faulty BCM can turn a reliable vehicle into a source of daily frustration. It’s the nerve center for your vehicle’s body electronics, and when it goes, chaos follows. This isn’t just an annoyance; it can affect everything from your door locks to instrument cluster warnings.
We offer a straightforward, reliable solution. This BCM is a direct-fit replacement for part number 16257155 and other interchangeable numbers. The best part? We handle the programming for you. Simply provide your vehicle’s VIN during checkout, and our experts will flash the module with the latest GM software specific to your truck. This means no expensive trip to the dealership and no need for specialized programming tools. You get a part that’s ready for installation right out of the box, restoring your vehicle’s functions and your peace of mind.
From the Diagnostic Bay: The Case of the Haunted SUV
A customer brought in a 2000 Tahoe with a list of bizarre symptoms: the radio would shut off randomly, the power locks would cycle while driving, and the security light was always on. He’d already replaced the battery and checked all the fuses. A scan showed a handful of ‘U’ codes, indicating a loss of communication between modules. In my shop, this pattern almost always points to the BCM. After confirming power and ground to the module were good, we swapped in a pre-programmed BCM. The communication codes vanished, and all the strange electrical issues were resolved instantly. It’s a classic failure I’ve diagnosed hundreds of times on these GMT800 platforms.
Is Your Yukon Showing These BCM Failure Signs?
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights flickering, staying on, or not working at all.
- ✔ The security system light is illuminated, or the vehicle won’t start due to a false theft-deterrent activation.
- ✔ Inconsistent operation of the horn, windshield wipers, or radio.
- ✔ Diagnostic trouble codes (DTCs) related to communication errors (U-codes) or BCM internal faults.
- ✔ False warnings on the instrument panel, such as ‘Door Ajar’.
Your Straightforward BCM Installation Guide
Installing your pre-programmed 2000 Yukon XL 2500 BCM is a manageable job for a confident DIYer. The module is typically located under the driver’s side of the dashboard.
- Step 1: Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Step 2: Locate the BCM: On most of these models, it’s mounted to the left of the steering column, often behind a lower dash panel. You may need to remove this panel for access.
- Step 3: Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old module from its mounting bracket.
- Step 4: Install the New Module: Mount your new, pre-programmed BCM in the same location and securely plug in all the electrical connectors. Ensure they click into place.
- Step 5: Reconnect and Test: Reinstall any panels you removed and reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, wipers, etc.
Verified Fitment for Your 2000 GM SUV
This Body Control Module is a guaranteed fit for the following vehicles, matching part numbers 16257155, 15136876, 09377486, and 9377486. Please ensure your vehicle is a 2000 model year.
- 2000 Chevrolet Suburban 1500 & 2500
- 2000 Chevrolet Tahoe
- 2000 GMC Yukon (excluding Denali models)
- 2000 GMC Yukon XL 1500 & 2500
Important Post-Installation Information
While this module is programmed for a simple installation, some vehicles may require additional steps to sync with other systems:
- Airbag System Sync: If your airbag warning light is on after installation, a procedure called ‘Setup SDM Primary Key in BCM’ is needed. This requires a professional-grade scan tool to sync the BCM with the airbag module.
- Brake Pedal Position Relearn: On some models, a recalibration of the brake pedal position sensor might be necessary to ensure correct brake light and traction control operation.
Disclaimer: Always consult a factory service manual or a qualified technician if you are unsure about any step. No core charge is required; you can keep your old part.
Frequently Asked Questions
Do I need to do any programming myself?
No. We program the BCM to your vehicle’s specific VIN before shipping it to you. It arrives ready for installation, saving you a trip to the dealer.
Where do I provide my VIN?
Please enter your 17-digit Vehicle Identification Number (VIN) during the checkout process. We cannot program and ship your module without it.
What if my airbag light comes on after I install it?
This can happen occasionally. It means the new BCM needs to be electronically ‘introduced’ to the airbag module (SDM). A repair shop with a capable scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Is this a difficult part to replace at home?
For someone with basic mechanical skills, it’s very manageable. The BCM is located under the driver’s side dash and is typically held in by a few bolts or clips. The main challenge is accessing it. Our pre-programming eliminates the most difficult part of the job.
Will this fix my ‘Service 4WD’ light?
While the BCM communicates with many systems, a ‘Service 4WD’ message is more often caused by the transfer case control module (TCCM), a faulty encoder motor, or a dash switch. A proper diagnosis is recommended before replacing the BCM for that specific issue.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module.