Are you chasing electrical gremlins in your GM truck or SUV? Flickering dashboard lights, power windows with a mind of their own, or a security system that randomly prevents your vehicle from starting are all classic signs of a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can cause a host of frustrating and difficult-to-diagnose problems. Stop throwing parts at the problem and get the definitive solution.
This is a direct-fit replacement BCM, a crucial component for a wide range of popular 1998-2000 GM vehicles. What sets our module apart is our professional, in-house programming service. Before we ship it, we flash the module with the latest GM software, perfectly matched to your vehicle using the VIN you provide. This means you get a true plug-and-play solution, saving you from a costly and time-consuming trip to the dealership for programming. This is the same process they would use, but delivered right to your door.
A Technician’s Notebook: The Parasitic Drain Puzzle
I remember a 1999 Silverado that came into my bay with a classic complaint: a dead battery every morning. The owner had already replaced the battery and alternator. After hooking up my ammeter, I saw a significant parasitic draw. By pulling fuses one by one, I isolated the circuit to the BCM. Even with the key off, the module wasn’t letting certain circuits go to sleep. It’s a common failure I’ve seen hundreds of times on these trucks—internal relays or capacitors fail, causing these phantom power drains. Installing a properly programmed 1999-2000 GM BCM solved the issue completely, saving the customer from further guesswork and the cost of a new battery every few months.
Is Your Truck Showing These BCM Failure Symptoms?
- ✔ Erratic or non-functional interior and exterior lights (headlights, dome lights, dash lights)
- ✔ Power windows, door locks, or mirrors working intermittently or not at all
- ✔ The security or anti-theft light stays on, preventing the engine from starting
- ✔ A persistent battery drain that kills your battery overnight (parasitic draw)
- ✔ Horn honking randomly or not working when pressed
- ✔ Diagnostic trouble codes (DTCs) related to communication errors (U-codes) or lost communication with other modules
A Straightforward Guide to BCM Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait about 10-15 minutes to allow all system capacitors to discharge.
- ✔ Locate the BCM: On most compatible vehicles like the Silverado, Sierra, Astro, and Safari, the BCM is located on the driver’s side, up under the dashboard, often near the steering column. On models like the S10, Blazer, and Jimmy, it’s typically found behind the center part of the dashboard. A quick search for your specific model will confirm its location.
- ✔ Remove the Old Module: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed to be released. Once unplugged, 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, making sure they click into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position (without starting the engine) and test all body functions: lights, locks, windows, horn, etc.
Important Post-Installation Note: This 1999-2000 GM BCM is programmed to be as close to plug-and-play as possible. However, in some cases, additional steps may be required. If your airbag light comes on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. Additionally, a Brake Pedal Position relearn may be necessary on some models to ensure proper brake light and traction control operation. Always consult a factory service manual for vehicle-specific details.
Will This Fit My Vehicle?
We guarantee compatibility if your vehicle is listed below and your original module has one of the following part numbers: 19153625, 8191536250, 16257125, 191583625, 8093668010, 8162571250, 8191536250, or 09366801.
- Chevrolet Astro Van: 2000 (LH dash)
- Chevrolet Blazer S10 / GMC Jimmy S15: 1998-2000 (center dash, ID 16257125)
- Chevrolet S10 / GMC S15/Sonoma Pickup: 1998-2000 (center dash, ID 16257125)
- Chevrolet Silverado 1500/2500: 1999-2000 (LH dash)
- GMC Safari Van: 2000 (LH dash)
- GMC Sierra 1500/2500: 1999-2000 (LH dash)
- Isuzu Hombre: 1999-2000 (LH dash)
- Oldsmobile Bravada: 1998 (center dash, w/ extended build date opt ZN4)
Frequently Asked Questions
1999-2000 GM BCM
Is there a core charge or do I need to send my old part back?
No. There is absolutely no core charge for this . You can keep your old module.