Tired of Your Truck’s Electrical Gremlins?
Are strange electrical issues turning your reliable GMC Envoy, Chevy Trailblazer, or other GMT360 platform SUV into a source of daily frustration? When power windows have a mind of their own, interior lights flicker, or the dashboard lights up with false warnings, it’s often a sign that the central command centerโthe Body Control Module (BCM)โis failing. This isn’t just an annoyance; it’s a critical failure that can affect your vehicle’s usability and safety. Don’t let a faulty BCM dictate your day. Take control back with a reliable, pre-programmed solution.
Common GMT360 BCM Failure Symptoms & Your Solution
The BCM is the brain behind most of your vehicle’s cabin electronics. When it malfunctions, the symptoms can be widespread and confusing. If you’re experiencing any of the following, a failing Envoy Body Control Module 15135466 is the most likely culprit:
- Erratic power window and door lock operation
- Interior dome lights or exterior lights staying on or not working at all
- Intermittent no-start conditions or a dead battery from parasitic drain
- Warning lights (like the airbag or brake light) appearing for no reason
- HVAC blower motor or controls not responding correctly
This professionally programmed Body Control Module is the definitive fix. We take a quality, inspected BCM and flash it with the latest, most stable GM software updates specifically for your vehicle’s VIN. This not only resolves the existing problems but also corrects potential bugs from the original factory programming, ensuring long-term stability.
Features & Benefits
- โ Plug & Play Installation: This module arrives programmed to your vehicle’s specific VIN. There is absolutely no need for an expensive and time-consuming trip to the dealership for additional programming.
- โ Latest GM Software Updates: We flash each unit with the newest software available from General Motors. This corrects known factory bugs and improves overall electronic performance and stability.
- โ Guaranteed Compatibility: This is a direct replacement for part numbers 15135466, 25802312, 8258023120, and 15787809, ensuring a perfect fit and function for the models listed.
- โ No Core Charge Required: Keep your old part. We don’t require you to send the faulty module back, saving you the time, cost, and hassle of a core return.
- โ Restore Full Functionality: Get your power accessories, lighting, and other body systems working exactly as they should, restoring the comfort and convenience you expect from your truck.
- โ Peace of Mind: This unit is backed by our one-year replacement warranty.
An Expert’s Insight: From over 20 years in diagnostics, I’ve seen countless owners replace a BCM only to find out it still needs programming at the dealer, adding hundreds in cost and hassle. Our process eliminates that step entirely. We handle the complex VIN-specific programming *before* it ships, using the same tools as the dealership. This means when your part arrives, you’re getting a true plug-and-play solution designed to solve the problem right out of the box. This is why a pre-programmed Envoy Body Control Module 15135466 is the smartest repair path for both DIYers and professional shops.
Post-Installation Information
While this BCM is designed for a simple installation, some vehicles may require one or two simple recalibration procedures after the part is installed. These are standard for this type of repair and can typically be performed by any qualified technician with a professional-grade diagnostic tool.
- Airbag System Sync: If the airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed to sync the systems.
- Brake Pedal Position Relearn: A recalibration of the brake pedal position sensor may be required to ensure proper brake light and traction control function.
Frequently Asked Questions
How do I provide my vehicle’s VIN?
It’s easy! Simply enter your 17-digit VIN in the designated text box on this page or in the ‘notes’ section during checkout. We cannot program and ship your module without it.
Is this a difficult part to install myself?
For someone with basic mechanical skills, this is a very manageable job. The BCM is typically located as part of the front fuse box assembly. The most important step is to disconnect the vehicle’s battery before starting. While the physical swap is straightforward, be aware that post-install procedures like an airbag sync may be required, which needs a professional scan tool.
What if my airbag light comes on after I install it?
This is a known possibility. The new BCM needs to be electronically ‘introduced’ to the airbag’s computer (SDM). A technician with a bi-directional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to sync the modules and turn off the light.
My vehicle has the factory security system. Will this work?
This specific part, the Envoy Body Control Module 15135466, is for vehicles WITHOUT the factory security system. Please double-check your vehicle’s options or consult your mechanic to ensure you are ordering the correct part. Ordering the wrong module will result in a no-start condition.
Do I need to send my old BCM back?
No. This product comes with no core charge. You can keep, recycle, or dispose of your old module at your convenience.
Will this fix my ‘Service 4WD’ message?
While a faulty BCM can cause a wide range of issues, the ‘Service 4WD’ message on these trucks is most often caused by a failing Transfer Case Control Module (TCCM) or the encoder motor on the transfer case itself. It is best to have the 4WD system professionally diagnosed before replacing the BCM for that specific issue.