End the Electrical Gremlins in Your 2002 GM Truck or SUV
If you’re dealing with flickering lights, a security system that has a mind of its own, or power accessories that work intermittently, you’re not alone. I’ve spent countless hours in the service bay diagnosing these exact issues on early 2000s GM trucks. More often than not, the culprit is a failing Body Control Module (BCM). This isn’t just a part; it’s the central hub for your vehicle’s body electronics. When it fails, it can cause a cascade of frustrating and unpredictable problems. This replacement BCM, part number 19208544, is the definitive solution to restore order and reliability to your vehicle.
The biggest hurdle with replacing a BCM has always been the programming. In the past, you’d have to install the module and then have your truck towed to a dealership for expensive flashing. We eliminate that step entirely. Simply provide us with your vehicle’s VIN during checkout, and our technicians will program this module with the latest, most stable software from GM specifically for your truck. It arrives at your door ready for a straightforward installation, saving you significant time, money, and hassle.
A Technician’s Notebook
I remember a 2002 Yukon XL that came into my shop with a truly baffling set of symptoms. The owner complained that sometimes the radio wouldn’t turn on, the power locks would cycle randomly while driving, and the security light would stay illuminated, occasionally preventing the truck from starting. We checked all the usual suspects—grounds, fuses, relays—and everything seemed fine. There were a few intermittent communication codes (U-codes) stored, pointing to a network issue. After hooking up the scan tool and monitoring the BCM data stream, we saw erratic outputs that didn’t match any commands. That confirmed it: the BCM was failing internally. We sourced a pre-programmed module, and the swap took less than 30 minutes. The customer called a week later, thrilled that his truck was finally behaving predictably. This is the exact fix that got that Yukon back on the road.
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:
- ✔ Erratic or non-functional interior/exterior lights.
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The security or anti-theft light staying on, potentially causing a no-start condition.
- ✔ Gauges on the instrument cluster behaving erratically or not working.
- ✔ False warnings on the driver information center (DIC).
- ✔ Radio or climate control malfunctions.
- ✔ Stored diagnostic trouble codes (DTCs) related to communication errors, like U0140.
A Straightforward Guide to Installation
Replacing the 2002 Avalanche 1500 BCM is a job most DIYers can handle with basic tools. The module is typically located under the driver’s side of the dashboard, near the steering column.
- Step 1: Safety First: Disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
- Step 2: Locate the BCM: On most of these GM trucks and SUVs, it’s a black plastic box with several large multi-pin connectors, secured by clips or small bolts under the dash.
- Step 3: Disconnect and Remove: Carefully release the locking tabs on each electrical connector and unplug them. Remove any mounting hardware and take out the old BCM.
- Step 4: Install the New BCM: Mount your new, pre-programmed BCM in the same location. Firmly plug in all the electrical connectors, ensuring each one clicks securely into place.
- Step 5: Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, radio, etc.—to confirm the repair.
Important Post-Installation Information
Because this module is central to many systems, a couple of additional steps may be required after installation. Please be aware that if the airbag light is on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules. Additionally, a ‘Brake Pedal Position Relearn’ might be necessary on some models to ensure correct brake light and traction control operation. These are standard procedures when replacing a 2002 Avalanche 1500 BCM and are not indicative of a faulty part.
Verified Vehicle Compatibility
This module is a direct-fit replacement for several popular 2002 GM models. It is compatible with original part numbers 15063577, 15081857, 19208544, 15095335, DKAJ, and DPNW. Please confirm your vehicle is on the list below:
- ✔ 2002 Cadillac Escalade (4×4)
- ✔ 2002 Cadillac Escalade EXT
- ✔ 2002 Chevrolet Avalanche 1500 (4×4)
- ✔ 2002 Chevrolet Suburban 1500 (4×4)
- ✔ 2002 Chevrolet Tahoe (4×4)
- ✔ 2002 GMC Yukon (4×4)
- ✔ 2002 GMC Yukon XL 1500 (4×4)
Best of all, there is no core charge for this module. You can keep your old part, saving you the hassle and expense of a core return.
Frequently Asked Questions
Do I really need to provide my VIN?
Yes, absolutely. Providing your VIN is critical. We use it to load the correct, vehicle-specific software and the latest updates from GM onto your BCM, ensuring it works perfectly with your truck’s options right out of the box.
What happens if my airbag light is on after I install it?
This is a normal possibility. The new BCM needs to be electronically ‘introduced’ to the airbag system’s computer (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure using a bi-directional scan tool, which a professional mechanic can perform.
Is this a difficult part to replace myself?
For most individuals with basic mechanical skills, this is a very manageable job. It’s located under the dashboard and involves unplugging the old module and plugging in the new one. No complex wiring is required.
Why is there no core charge?
We simplify the process for you. By not requiring a core return, we save you the time, shipping costs, and complexity of sending your old, non-working part back. It’s one less thing for you to worry about.
Will this fix my ‘Service 4WD’ message?
While a failing BCM can cause a variety of electronic issues, the ‘Service 4WD’ message is more commonly related to the Transfer Case Control Module (TCCM) or the encoder motor. It’s best to diagnose that specific issue before replacing the BCM for that symptom alone.
Is this the same 2002 Avalanche 1500 BCM that the dealer sells?
This is a high-quality replacement module that is programmed to function just like the original equipment. We load it with official GM software based on your VIN, providing a reliable and cost-effective alternative to a dealership part.