Restore Your Truck’s Electrical Brain and End Frustrating Glitches
Are you tired of chasing electrical gremlins in your GM truck or SUV? One minute the power locks work, the next they don’t. The security light flashes for no reason, or worse, the vehicle refuses to start intermittently. As a technician with over two decades of experience, I’ve seen these exact issues hundreds of time. The culprit is often a failing Body Control Module (BCM), the central command hub for your vehicle’s body electronics. This isn’t just an inconvenience; it can leave you stranded. This replacement 1999-2000 GM BCM is the definitive solution to restore full functionality and peace of mind.
We take the guesswork and high cost out of the repair. Forget about towing your vehicle to a dealership for expensive programming. We handle that for you. Simply provide your vehicle’s VIN during checkout, and our experts will flash this module with the latest GM software specific to your truck. It arrives at your door ready for a straightforward installation, saving you significant time and money.
Case Study: A Tricky Diagnosis
A customer brought in his ’99 Silverado 1500 with a classic “ghost in the machine” problem. The dome light would flicker, the radio would cut out, and occasionally the truck wouldn’t crank, showing the security light. He had already replaced the battery and checked the grounds. After connecting my scan tool, I found a series of U-codes (communication errors) pointing to a network issue. Instead of a complex wiring problem, my experience pointed to the BCM. We swapped in a VIN-programmed module, and instantly, all the symptoms vanished. This 1999-2000 GM BCM solved in an hour what had been a month-long headache for the owner.
Is Your Truck Exhibiting These BCM Failure Signs?
A failing BCM can cause a wide range of confusing symptoms. If your vehicle is showing any of the following, this module is the likely solution:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or won’t turn on at all.
- ✔ The security or anti-theft light is illuminated, often causing a no-start condition (GM Passlock issues).
- ✔ The horn sounds randomly or doesn’t work when pressed.
- ✔ Communication issues between modules, often setting DTCs like U0140, U0155, or other U-codes.
- ✔ Wipers behaving erratically or not parking in the correct position.
A Straightforward Guide to BCM Installation
Installing your new BCM is a manageable job for a DIY enthusiast. This pre-programmed module makes the process much simpler. Follow these general steps:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before starting work.
- Locate the BCM: On these GM models, the BCM is typically located under the driver’s side of the dashboard (LH dash) or in the center dash area. It’s a black plastic box with several large electrical connectors.
- Remove the Old Module: Carefully unplug all the electrical connectors. They have locking tabs that need to be depressed. Once unplugged, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location. Firmly reconnect 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—lights, locks, windows, wipers, etc.—to confirm the repair.
Post-Installation Procedures: What to Expect
In most cases, your vehicle will be ready to go. However, on some models, a couple of quick relearn procedures may be needed to sync the new BCM with other systems. Please be aware of the following:
- Airbag System Sync: If the airbag warning light is on after installation, a professional scan tool is required to perform the “Setup SDM Primary Key in BCM” procedure. This syncs the airbag system with the new BCM.
- Brake Pedal Position Relearn: Some vehicles may require a brake pedal position sensor recalibration to ensure correct brake light and traction control operation.
Disclaimer: Vehicle systems vary. Always consult a factory service manual or a qualified professional if you are unsure about any step.
Verified Fitment For Your GM Truck or SUV
This BCM is a direct replacement for part numbers 19153625, 8191536250, 16257125, 191583625, 8093668010, 8162571250, and 09366801. It is guaranteed to fit the following vehicles:
- 1998-2000 Chevrolet S10 / GMC S15/Sonoma (Center Dash)
- 1998-2000 Chevrolet Blazer S10 / GMC Jimmy S15 (Center Dash)
- 1999-2000 Chevrolet Silverado 1500 / 2500 (LH Dash)
- 1999-2000 GMC Sierra 1500 / 2500 (LH Dash)
- 2000 Chevrolet Astro / GMC Safari (LH Dash)
- 1998 Oldsmobile Bravada (Center Dash, w/ opt ZN4)
- 1999-2000 Isuzu Hombre (LH Dash)
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the BCM with the exact software and settings your specific vehicle requires. This ensures all features work correctly and makes the installation a plug-and-play process, eliminating the need for a trip to the dealer.
Is this part difficult to install?
For someone with basic mechanical skills, the installation is very manageable. It involves locating the module under the dash, swapping a few electrical connectors, and securing it. Our pre-programming service handles the most complex part of the job for you.
What if my airbag light comes on after I install it?
This is uncommon but can happen. It means the new BCM needs to be electronically introduced to the airbag module (SDM). This requires a ‘Setup SDM Primary Key’ procedure, which can be done by most professional repair shops with a high-level diagnostic tool.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module, which saves you the time and expense of shipping a core back.
Will this fix my truck’s security light and no-start problem?
A faulty BCM is one of the most common causes of issues with the GM Passlock security system. Replacing it with this correctly programmed module is a very effective way to solve those persistent security-related starting problems.