Restore Your Vehicle’s Electrical System with a Plug-and-Play BCM
Are you battling frustrating electrical gremlins in your GM SUV? Flickering lights, unresponsive power windows, erratic door locks, or a security light that won’t turn off are all classic signs of a failing Body Control Module (BCM). These issues can make your daily drive unreliable and stressful. This fully programmed 15191621 BCM is the definitive solution, designed to restore your vehicle’s factory functions and get you back on the road with confidence.
Common Symptoms of a Failing BCM & Your Solution
The BCM is the central command center for your vehicle’s body electronics. When it fails, it can cause a wide range of confusing and intermittent problems. If you’re experiencing any of the following, a faulty BCM is the likely culprit:
- Power windows, mirrors, or door locks working intermittently or not at all.
- Interior or exterior lights behaving erratically (staying on or not turning on).
- The security system engaging randomly, possibly causing a no-start condition.
- Erroneous warning lights on the instrument cluster.
- Communication failures with diagnostic scan tools.
Instead of paying steep dealership prices for a new module and programming fees, our service provides a cost-effective and convenient alternative. We flash this BCM with the latest GM software updates, tailored specifically to your vehicle’s VIN. This ensures a seamless installation process and restores the precise functionality your truck was built with.
Features & Benefits
- ✔ VIN-Programmed for Your Vehicle: We flash the module to your specific VIN before shipping, eliminating the need for expensive dealer programming. This makes for a much simpler installation.
- ✔ Direct-Fit Replacement: This unit is a direct replacement for multiple part numbers, including 15191621, 15122670, 15065293, 15114669, and 9352135, ensuring perfect compatibility.
- ✔ No Core Charge: Keep your old module. There’s no core charge, no return hassle, and no extra upfront cost.
- ✔ Restored Functionality: Get your power accessories, lighting, and security systems working like new again.
- ✔ Peace of Mind Guarantee: This unit is backed by our one-year replacement warranty.
Expert Insight from Our Technicians:
The GMT360 platform, which includes vehicles like the Trailblazer and Envoy, is known for BCM issues as they age. We’ve seen countless owners chase these electrical problems, replacing switches and relays only to find the root cause was the BCM itself. The biggest hurdle is always the programming. A used module from a salvage yard won’t work without being programmed, and dealers often refuse to program customer-supplied parts. That’s why a professionally programmed 15191621 BCM is the smartest repair. It saves you time, money, and the headache of a vehicle that’s electronically unreliable.
Frequently Asked Questions
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer in your vehicle that controls and monitors a wide variety of non-engine-related functions. This includes power windows, door locks, interior/exterior lighting, security systems, and more. It acts as a central hub for these electronic accessories.
Is this BCM truly plug-and-play?
Yes, because we program the module to your vehicle’s specific VIN before it ships, it is designed to be a direct installation. However, as noted in our policies, some vehicles may require a simple ‘relearn’ procedure for systems like the airbag (SDM) or brake pedal position sensor, which can be performed with a professional scan tool.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your BCM without it. You can typically find your VIN on your vehicle’s dashboard (visible through the windshield) or on your insurance/registration documents.
What if my airbag light comes on after installation?
If the airbag light is illuminated after you install the BCM, it simply means the BCM and the airbag’s Supplemental Deployment Module (SDM) need to be synchronized. A qualified technician will need to perform the ‘Setup SDM Primary Key in BCM’ procedure with a professional-grade diagnostic tool to complete the sync.
Do I need to send my old BCM back?
No. This product has no core charge. You can keep your original part, which can be useful for diagnostic comparison or as a backup.
Will this BCM fit my vehicle?
This BCM fits a wide range of GM SUVs from 2002-2005, including the Trailblazer, Envoy, Rainier, Bravada, Ascender, and Saab 9-7X. Please review the detailed fitment list on this page and ensure your original part number is listed to confirm compatibility.