Restore Your SUV’s Electrical System and Drive with Confidence
Are you battling a frustrating array of electrical gremlins in your Trailblazer, Envoy, or Rainier? Flickering dash lights, unpredictable power windows, door locks with a mind of their own, or a security light that won’t turn off are all classic signs of a failing Body Control Module (BCM). Don’t let these issues compromise your vehicle’s reliability and your peace of mind. This BCM is the definitive, hassle-free solution to get your truck back to 100% functionality.
Common Symptoms & Your Solution
A faulty BCM can cause a cascade of confusing problems that can be difficult to diagnose. If you’re experiencing any of the following, a failing BCM is the likely culprit:
- Intermittent or non-working power windows, door locks, and mirrors.
- Erratic interior or exterior lighting (dome lights, headlights, etc.).
- Dashboard warning lights (like the airbag or security light) staying on.
- Gauges behaving strangely or not working at all.
- Problems with the radio or HVAC controls.
- In some cases, a no-start condition where the vehicle security system prevents cranking.
This replacement Trailblazer BCM 15122670 is the solution. We take the biggest headache out of the repair by programming the module to your vehicle’s specific VIN before we ship it. This means no expensive trip to the dealership for programming—it arrives ready for a straightforward installation.
Features & Benefits
- ✔ Plug & Play Installation: This module comes fully flashed with the latest GM software updates for your specific VIN. Just provide your VIN at checkout, and we handle the complex programming for you.
- ✔ No Core Charge: Forget the hassle and expense of returning your old part. You can keep your original module without any extra fees or deposits.
- ✔ Restores Full Functionality: Get your power accessories, lighting, and security systems working exactly as they did from the factory.
- ✔ Direct-Fit Replacement: Engineered to be a perfect match for original part numbers 15122670, 15065293, 15114669, 15191621, and 9352135, ensuring a perfect fit and seamless integration.
- ✔ This unit is backed by our one-year replacement warranty.
Expert Insight: The Brain of Your SUV’s Comforts
Think of the BCM as the central nervous system for your vehicle’s body electronics. It doesn’t control the engine, but it manages nearly everything you interact with inside the cabin. When it fails, it can send confusing signals, making you think multiple, unrelated parts have broken at once. Replacing a radio or a window switch won’t fix the problem if the BCM is the root cause. By installing a properly programmed Trailblazer BCM 15122670, you’re not just fixing one symptom; you’re restoring the entire command center for your vehicle’s accessories, saving you from chasing down multiple electrical ghosts.
Post-Installation Notes
While this module is programmed for your VIN, some vehicle systems may require a simple recalibration after installation to ensure they communicate correctly with the new BCM. These procedures can often be performed with a high-quality bidirectional scan tool. Please be aware of the following potential requirements:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is necessary to sync the systems.
- Brake Pedal Position Relearn: A recalibration of the brake pedal position sensor may be needed on certain models to ensure correct brake light and traction control operation.
Frequently Asked Questions
Why do I need to provide my VIN?
Your vehicle’s VIN (Vehicle Identification Number) is essential because it allows us to program the BCM with the exact software and settings for your specific model, year, and options. This critical step ensures the module works correctly right out of the box, saving you a trip to the dealer for expensive programming.
Is this BCM difficult to install?
The physical installation is typically straightforward for someone with moderate DIY mechanical skill. The BCM is located on the side of the front fuse box. The main challenge of this repair is usually the programming, which we handle for you. Always disconnect the battery before starting work. Consulting a service manual for your specific vehicle is recommended.
Do I need to send my old part back?
No. This product comes with no core charge. You can keep, recycle, or dispose of your original BCM at your convenience without needing to return it to us.
Will this fit my 2004 GMC Envoy?
Yes, this Trailblazer BCM 15122670 is compatible with a wide range of GM SUVs built on the same platform, including the GMC Envoy, Oldsmobile Bravada, Buick Rainier, and others. Please check the detailed fitment list on this page to confirm compatibility with your exact year and model.
What if my airbag light comes on after installation?
This is a known possibility. The new BCM needs to be electronically ‘introduced’ to your vehicle’s airbag module (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure, which can be performed by a qualified technician with a professional-grade diagnostic tool. It’s a simple sync procedure that will resolve the light.