Restore Full Electrical Function to Your GM Vehicle
Is your GMC Savana or Chevrolet Express van plagued by strange electrical issues? Flickering lights, malfunctioning power windows and locks, or a security system that acts up are all classic signs of a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it fails, it can cause a cascade of frustrating and difficult-to-diagnose problems. This replacement BCM, part number 15872421, is the definitive solution to get your workhorse van or family vehicle back in reliable working order.
Common Failure Symptoms
- ✔ Intermittent or non-functional power windows, mirrors, or door locks.
- ✔ Erratic interior or exterior lighting behavior (lights staying on or not turning on).
- ✔ Instrument cluster warning lights appearing randomly (e.g., security, airbag).
- ✔ Vehicle’s anti-theft or security system preventing the engine from starting.
- ✔ Horn sounding unexpectedly or not working at all.
- ✔ Wipers operating incorrectly or not parking in the correct position.
Why Choose Our Savana 3500 Van Body Control Module?
Getting your vehicle repaired shouldn’t be complicated. We make it simple by pre-programming this BCM specifically for your vehicle using the VIN you provide. This critical step ensures that the module communicates correctly with your vehicle’s other systems right out of the box, saving you from expensive dealership programming fees and additional downtime. This module is a direct replacement for a wide range of original equipment part numbers, ensuring broad compatibility across many GM models including the Chevrolet Express, GMC Acadia, Cadillac DTS, and more.
Installation and Post-Install Notes
While installation is straightforward for many, some vehicles may require simple relearn procedures after the new BCM is installed. These are not programming steps but rather synchronization processes that can sometimes be performed without special tools. However, for certain systems, a diagnostic scan tool may be necessary.
- Airbag System Sync: If the airbag (SRS) light is illuminated after installation, a professional scan tool is needed to perform the “Setup SDM Primary Key in BCM” procedure. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: To ensure correct brake light and traction control operation, a brake pedal position sensor relearn might be required on some models.
Disclaimer: Always consult your vehicle’s factory service manual or a qualified automotive technician for specific procedures related to your make and model.
Frequently Asked Questions
Do I need to program this BCM?
No! We handle the programming for you. After you place your order, simply provide us with your vehicle’s VIN, and we will flash the module with the latest GM software for your specific vehicle before shipping.
Is this a simple plug-and-play installation?
For most functions, yes. Because it comes pre-programmed, it will immediately restore core functions. However, as noted above, some vehicles may require additional relearn procedures for systems like the airbags or brake position sensor.
What information do you need from me?
We only need your vehicle’s 17-digit Vehicle Identification Number (VIN) to ensure we load the correct software for your specific options and configuration.
Will this fix my no-start security issue?
A faulty BCM is a very common cause of security-related no-start problems in these GM vehicles. While other issues can cause this, replacing a bad BCM with our pre-programmed unit is a very effective solution for this specific problem.
Is there a core charge for my old part?
No, there is no core charge. You can keep your original module.
Where is the BCM located on my Savana or Express van?
On most GMC Savana and Chevrolet Express vans covered by this part, the BCM is located behind the center of the dashboard. Always verify the location for your specific vehicle before beginning work.