Restore Full Functionality to Your GM Truck or SUV
Are you chasing electrical ghosts in your 2003-2006 Cadillac Escalade? Do your lights flicker, does the AC work only when it wants to, or are you facing a frustrating no-start condition? You’re not alone. The Body Control Module (BCM) is the central command center for your vehicle’s body electronics, and when it fails, it can cause a cascade of baffling issues. This 15116066 Body Control Module is the definitive, hassle-free solution, arriving pre-programmed to your vehicle’s VIN for a true plug-and-play repair.
Case Study: The Frustrating Silverado Fix
A customer brought in his ’05 Silverado 2500 with a laundry list of complaints: the radio would cut out, the power locks worked intermittently, and the blower motor was completely dead—a real problem in the summer heat. He’d already replaced the blower motor resistor with no luck. After connecting my scanner, I saw a handful of communication codes but nothing pointing to a single component. This is a classic BCM failure signature. In my shop, I’ve seen this exact pattern on hundreds of these GMT800 platform trucks. We installed a VIN-programmed 15116066 BCM, and in less than 10 minutes, every single issue was resolved. The customer saved hundreds by avoiding a dealership diagnosis and programming fee.
Is Your GM Truck Showing These Signs of BCM Failure?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is likely the solution you need:
- ✔ Inoperative or erratic HVAC and climate controls.
- ✔ Non-functional power windows, door locks, or interior/exterior lights.
- ✔ An active airbag warning light, often with a DTC like B1001 (Option Configuration Error).
- ✔ Security system faults, including PASSLOCK issues that can prevent the engine from starting.
- ✔ Unexplained battery drain or strange electrical grounding problems.
- ✔ A dashboard that lights up with multiple, seemingly unrelated warning lights.
A Straightforward Guide to Installation
One of the best features of this module is its simple installation. You don’t need to be a master mechanic to get your truck running right again. The entire process typically takes less than 5 minutes.
- Step 1: Safety First. Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work. This prevents short circuits and helps reset the vehicle’s electronic systems.
- Step 2: Locate the BCM. On most compatible trucks and SUVs (like the Escalade, Tahoe, and Silverado Crew Cab), the BCM is located under the driver’s side dashboard, near the steering column. On Savana and Express vans, it’s typically behind the center dash panel.
- Step 3: Swap the Module. The BCM is held in place by retaining clips. Simply unclip the old module and carefully disconnect the electrical connectors. Plug the connectors into your new, pre-programmed BCM and snap it back into place.
- Step 4: Reconnect and Verify. Reconnect the negative battery terminal. Start the vehicle and test all functions—lights, windows, locks, wipers, and HVAC—to confirm the repair was successful.
Post-Installation Note: In some cases, particularly if the airbag light was on, a professional scan tool may be needed to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the airbag system. This is a simple function on most professional scanners. A brake pedal position relearn might also be required on certain models.
Verified Fitment for Your GM Truck, Van, or SUV
This module is a direct replacement for part number 15116066 and is interchangeable with a wide range of other part numbers, including 15136225, 15198116, 10383536, and more. It is confirmed to fit the following vehicles:
- Cadillac: Escalade, Escalade ESV, Escalade EXT (2003-2006)
- Chevrolet: Avalanche 1500/2500 (2003-2006), Silverado 1500/2500/3500 (2003-2007 Classic), Suburban 1500/2500 (2003-2006), Tahoe (2003-2006), Express Van 1500/2500/3500 (2004-2007 w/ PRP option)
- GMC: Sierra 1500/2500/3500 & Denali (2003-2007 Classic), Yukon & Yukon XL 1500/2500 (2003-2006), Savana Van 1500/2500/3500 (2004-2007 w/ PRP option)
- Hummer: H2 (2003-2007)
Frequently Asked Questions
Why is this module pre-programmed?
We program the module to your vehicle’s specific VIN before shipping. This ensures all your vehicle’s original options work correctly right out of the box, saving you from a costly and time-consuming trip to the dealership for programming.
Is this part difficult to install for a DIYer?
Not at all. Installation is very straightforward and requires basic hand tools. As it’s located under the dash, it’s easily accessible and can typically be swapped in under 5 minutes.
What if my airbag light is on after I install the new BCM?
This can happen occasionally. It means the new BCM needs to be electronically ‘introduced’ to the airbag’s Sensing and Diagnostic Module (SDM). This requires a ‘Setup SDM Primary Key’ procedure, which can be performed by any professional shop with a compatible scan tool.
Do I need to send my old part back?
No. There is absolutely no core charge for this part. You can keep your old module without any hassle or extra fees.
Will this fix my no-start problem?
If your no-start issue is caused by the PASSLOCK security system, which is controlled by the BCM, then yes, this module is designed to resolve that fault. It’s a very common failure point on these vehicles.
Which part numbers does this BCM replace?
This module is a direct replacement for several part numbers, including 15116066, 15136225, 15136877, 15198116, 15257043, 10383536, and others listed in the product details.