Restore Your Truck’s Electrical System with a Reliable BCM
If you’re dealing with bizarre electrical issues in your 1999-2000 Silverado 1500, you know how frustrating it can be. One minute your power windows work, the next they don’t. The security light might stay on, preventing your truck from starting, or the interior lights have a mind of their own. These aren’t random glitches; they’re classic signs of a failing Body Control Module (BCM). As the central command for your truck’s body electronics, a faulty BCM can cause a cascade of problems that are maddening to diagnose. This module is the direct, reliable solution to get your truck back to normal.
We take the guesswork and hassle out of the repair. Unlike a generic part from the auto parts store, this BCM comes pre-programmed to your truck’s specific Vehicle Identification Number (VIN). Simply provide us with your VIN after purchase, and our technicians will flash the module with the latest GM software updates before it even leaves our facility. This ensures it communicates perfectly with your truck’s other systems right out of the box, saving you an expensive trip to the dealership for programming.
From the Diagnostic Bay
I remember a 1999 Sierra that came into my shop with a complaint of intermittent no-start and flickering interior lights. The owner had already replaced the battery and alternator, but the ‘gremlins’ persisted. After hooking up the scan tool, I noticed communication loss codes with the BCM. Instead of just swapping the part, we tested the power and ground circuits to the module—they were solid. This confirmed the BCM itself was the culprit. We installed a VIN-programmed module just like this one, and all the strange electrical issues vanished instantly. It saved the customer from chasing phantom problems and spending more money on unnecessary parts.
Is Your Truck Showing These Symptoms?
A failing BCM can manifest in many ways. If you’re experiencing any of the following, this module is likely the solution you need for your 1999-2000 Silverado 1500 BCM problems:
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior dome lights or dashboard lights staying on or not working at all.
- ✔ The anti-theft or security light flashing, causing a no-start condition.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Wipers operating intermittently or at the wrong speed.
- ✔ Communication error codes (like U-codes) when scanned with a diagnostic tool.
A Straightforward Guide to Installation
Installing your new BCM is a manageable job for a DIYer with basic tools. The most important part of a successful 1999-2000 Silverado 1500 BCM replacement is following the proper sequence.
- Safety First: Always disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
- Locate the BCM: On most GMT800 trucks like the Silverado and Sierra, the BCM is located under the driver’s side of the dashboard, to the left of the steering column. You may need to remove a lower dash panel for access.
- 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 Module: Mount your new, pre-programmed BCM in the same location and securely plug in all the electrical connectors. You should hear a ‘click’ as they lock into place.
- Reconnect Power: Re-attach the negative battery terminal. Turn the key to the ‘On’ position and verify that functions like power windows, locks, and interior lights are working correctly.
- Post-Installation Checks: In some cases, additional steps may be needed. If your airbag light is on, a professional ‘Setup SDM Primary Key’ procedure is required. A brake pedal position relearn may also be necessary for proper brake light function.
Verified Vehicle Compatibility
This Body Control Module is a guaranteed fit for a wide range of GM trucks and SUVs. Please verify your vehicle and part number from the list below. This unit replaces part numbers 19153625, 16257125, 09366801, and more.
- ASTRO 2000: Body Control (BCM); (LH dash)
- BLAZER S10/JIMMY S15 1998-2000: Body Control (BCM); (center dash), ID 16257125
- BRAVADA 1998: Body Control (BCM); (center dash), w/extended build date (opt ZN4)
- ISUZU HOMBRE 1999-2000: Body Control (BCM); (LH dash)
- S10/S15/SONOMA 1998-2000: Body Control (BCM); (center dash), ID 16257125
- SAFARI (GMC) 2000: Body Control (BCM); (LH dash)
- SIERRA 1500 PICKUP 1999: Body Control (BCM); (LH dash)
- SIERRA 1500 PICKUP 2000: Body Control (BCM); (LH dash), ID 16257125
- SIERRA 2500 PICKUP 1999: Body Control (BCM); (LH dash)
- SIERRA 2500 PICKUP 2000: Body Control (BCM); (LH dash), ID 16257125
- SILVERADO 1500 PICKUP 1999: Body Control (BCM); (LH dash)
- SILVERADO 1500 PICKUP 2000: Body Control (BCM); (LH dash), ID 16257125
- SILVERADO 2500 PICKUP 1999: Body Control (BCM); (LH dash)
- SILVERADO 2500 PICKUP 2000: Body Control (BCM); (LH dash), ID 16257125
Frequently Asked Questions
Do I need to program this BCM?
No. This BCM comes fully programmed to your vehicle’s VIN before we ship it. Just provide your VIN at checkout, and it will arrive ready for installation.
Is there a core charge?
No, there is no core charge for this part. You can keep your old BCM.
What if the airbag light comes on after I install it?
If the airbag light is on, the BCM and the airbag module (SDM) need to be synced. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure.
What is a Brake Pedal Position Relearn?
This is a calibration procedure that ensures the BCM knows the exact position of your brake pedal. It’s sometimes necessary for proper brake light and traction control operation after a BCM replacement.
Where do I find my VIN?
Your 17-digit VIN can be found on your vehicle’s registration, insurance card, or on a metal plate on the driver’s side of the dashboard, visible through the windshield.