Restore Full Electrical Function to Your GM Vehicle
Are you battling frustrating electrical gremlins in your 2008-2012 Chevy Express Van or other compatible GM vehicle? Issues like erratic power windows, flickering interior lights, a malfunctioning security system, or random warning lights on your dash often point to a single culprit: a failing Body Control Module (BCM). The BCM is the central nervous system for your vehicle’s body electronics, and when it fails, it can cause a wide range of confusing and unpredictable problems. This replacement Body Control Module, part number 20839063, is the definitive solution to restore your vehicle’s proper operation and peace of mind.
From the Diagnostic Bay
We had a 2011 Express 1500 work van come in that was driving the owner crazy. The dome lights would stay on, the power locks worked only half the time, and the radio would randomly shut off. The driver thought the vehicle was possessed. After ruling out wiring issues, we pinpointed the BCM. Instead of a costly trip to the dealership for a new module and programming, the owner ordered one of our pre-programmed units. We swapped it out in under an hour, and every single electrical issue was gone. It was a simple, effective fix that got his business-critical van back on the road the same day.
Is Your Body Control Module Failing?
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following symptoms, it’s a strong indicator that your BCM needs replacement:
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that flicker, stay on, or don’t turn on at all.
- ✔ The security system or keyless entry is behaving erratically or has stopped working.
- ✔ Windshield wipers activating on their own or not working when commanded.
- ✔ False warnings on the instrument cluster, such as ‘Service Airbag’ or ‘Service StabiliTrak’.
- ✔ Communication loss codes (U-codes) when scanned with a diagnostic tool.
- ✔ Rapid battery drain when the vehicle is off.
The Plug-and-Play Solution: A Programmed Express 1500 Body Control Module
Don’t let a dealership visit for programming add time and expense to your repair. We take the hassle out of the process. When you purchase this Express 1500 Body Control Module, we use the Vehicle Identification Number (VIN) you provide to flash the unit with the latest, most stable software updates directly from GM. This ensures that the module is perfectly matched to your vehicle’s specific options and configuration. The result is a part that arrives at your door ready for installation, with no additional programming required.
Post-Installation Steps
While this module is delivered ready to install, some GM vehicles may require one or two simple relearn procedures after the BCM is connected. These are standard procedures and do not require a trip to the dealer in many cases.
- Airbag System Sync: If the airbag warning 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: On some models, a brake pedal position sensor recalibration may be needed to ensure correct brake light and traction control operation.
Always consult a factory service manual or a qualified technician for guidance specific to your vehicle.
Frequently Asked Questions
Do I need to have this BCM programmed?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN during or after checkout, and we will flash the module with the correct software for your specific vehicle.
What is a BCM and what does it control?
The Body Control Module (BCM) is a computer that manages and controls many of your vehicle’s non-engine related electronic features, such as power windows, locks, lights, wipers, security system, and instrument cluster functions.
How do I find my VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, insurance card, or on a plate on the driver’s side dashboard visible through the windshield.
Will this fit my vehicle if my original part number is different?
Yes. This module replaces a wide range of original part numbers, as listed in the description. GM often consolidates multiple part numbers into a single, updated replacement. As long as your vehicle model is listed and you provide your VIN, we will ensure it is programmed correctly.
What if the airbag light comes on after I install it?
This is a known possibility on some GM vehicles. It simply means the new BCM needs to be electronically introduced to the airbag module. A technician with a professional diagnostic tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Is there a core charge for my old part?
No, there is no core charge for this part. You can keep your original module.