Tired of Chasing Electrical Gremlins in Your GM Truck?
If you’re dealing with flickering dash lights, power windows with a mind of their own, or a security light that prevents your truck from starting, you’re not alone. As a technician with over two decades of experience, I’ve seen these exact issues countless times on late 90s and early 2000s GM trucks. More often than not, the culprit is a failing Body Control Module (BCM). This isn’t just an inconvenience; it can affect your vehicle’s security and safety systems. This replacement BCM is the definitive, reliable solution to restore full functionality to your truck.
The biggest headache with replacing a BCM has always been the expensive trip to the dealership for programming. We eliminate that step entirely. Simply provide us with your vehicle’s VIN during checkout, and we will program this module with the latest GM software updates specifically for your truck. It arrives at your door ready for installation, saving you time, money, and frustration.
I remember a 2000 Sierra 1500 that came into the shop with a classic case of BCM failure. The owner was frustrated because his power locks worked intermittently, the radio would sometimes stay on after he took the key out, and occasionally the truck wouldn’t start, flashing the security light. He’d already replaced the battery and checked fuses. We plugged in the scan tool and saw a slew of communication errors (U-codes) pointing to the BCM. Instead of a costly dealer part, we installed one of our pre-programmed modules. In under an hour, every single one of his electrical gremlins was gone. It’s a satisfying fix that brings a vehicle back to life.
Is Your GM Truck Showing These Symptoms?
A failing BCM can cause a wide range of confusing electrical problems. If you’re experiencing any of the following, this module is likely the solution you need:
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ The security or anti-theft light stays on, preventing the engine from starting.
- ✔ Interior dome lights or dashboard lights flicker or don’t work correctly.
- ✔ The radio or other accessories stay powered on after the key is removed.
- ✔ Horn sounds unexpectedly or doesn’t work at all.
- ✔ Diagnostic trouble codes (DTCs) related to communication loss, such as U1000, U1016, or U1041.
A Straightforward Guide to Your BCM Installation
Installing your new Sierra 1500 Body Control Module is a manageable job for a confident DIYer. The BCM is typically located under the driver’s side of the dashboard. While specific steps can vary slightly, here is a general guide:
- Safety First: Always disconnect the negative terminal from your truck’s battery before working on any electrical components.
- Locate the BCM: On most Sierra/Silverado models, it’s a black box mounted to the left of the steering column, often behind a lower dash panel.
- Remove Trim Panels: You may need to remove the lower dash knee bolster panel to gain access. This is usually held in by a few screws or 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 or unclip the module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location and reconnect all electrical connectors, ensuring they click securely into place.
- Reconnect and Test: Reinstall any trim panels, reconnect the negative battery terminal, and test all functions—windows, locks, lights, and starting the vehicle.
Important Post-Installation Notes
While this module is programmed to be plug-and-play, some vehicle systems may require a ‘handshake’ with the new BCM. 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 airbag system with the new BCM.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be needed to ensure correct brake light operation.
- No Core Charge: You are not required to return your old BCM. There is no core charge or fee associated with this purchase.
Verified Compatibility for Your Vehicle
This module is a direct replacement for part numbers 16257125, 19153625, 8191536250, 191583625, 8093668010, 8162571250, and 09366801. It is guaranteed to fit the following vehicles:
- 1999-2000 GMC Sierra 1500 / 2500
- 1999-2000 Chevrolet Silverado 1500 / 2500
- 1998-2000 Chevrolet S10 / GMC Sonoma
- 1998-2000 Chevrolet Blazer / GMC Jimmy
- 2000 GMC Safari / Chevrolet Astro
- 1999-2000 Isuzu Hombre
- 1998 Oldsmobile Bravada (w/ opt ZN4)
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM is a computer in your truck that acts as the central hub for body-related electronics. It controls non-engine functions like power windows, locks, interior lights, the security system, and the horn.
Why do you need my VIN?
Your VIN (Vehicle Identification Number) allows us to program the BCM with the exact software and settings your truck had from the factory. This ensures all features work correctly and makes the installation plug-and-play, avoiding a trip to the dealer.
Is this part difficult to install myself?
For most DIYers with basic tools, this is a straightforward installation. The BCM is typically located under the driver’s side dashboard and involves removing a trim panel and swapping the module. See our installation guide above for the general steps.
What if the airbag light comes on after I install it?
This is a normal possibility. The new BCM needs to be electronically introduced to the airbag system (SDM). This requires a ‘Setup SDM Primary Key’ procedure with a professional-grade scan tool, which any competent repair shop can perform.
Do I need to send my old part back?
No. We do not require you to return your original module. There is no core charge or any additional fee.