Restore Full Control of Your GM Vehicle’s Electronics
Are you dealing with frustrating electrical problems in your Chevrolet Express or Savana van? Intermittent wipers, malfunctioning power locks, or a climate control system with a mind of its own are classic signs of a failing Body Control Module (BCM). As the central command center for your vehicle’s body electronics, a faulty BCM can cause a cascade of confusing issues. This replacement module, part number 15194170, is the definitive solution, arriving pre-programmed to your van’s specific VIN for a true plug-and-play repair that gets you back on the road without a costly trip to the dealership.
A Technician’s Notebook
I once had a 2006 Express work van in the bay that was driving the owner crazy. The complaint was ‘the radio turns off, the dome light flickers, and sometimes the power locks don’t work.’ The battery and alternator tested fine, and there were no obvious wiring issues. After hooking up the scanner, I saw a handful of communication loss codes (U-codes) pointing to the BCM. These modules often fail internally, causing unpredictable grounding issues that create a ghost in the machine. Installing a VIN-programmed 2004-2007 Express 1500 BCM solved all the problems in under 10 minutes. It’s a common failure point on these workhorses.
Is Your Van Showing These Common BCM Failure Symptoms?
- ✔ The security or anti-theft system prevents the engine from starting.
- ✔ Power windows, door locks, or mirrors operate intermittently or not at all.
- ✔ Interior or exterior lights (headlights, taillights, dome light) flicker or fail to turn on.
- ✔ The HVAC blower motor or climate controls are unresponsive.
- ✔ Your scanner shows communication DTCs like B1001 or other body-related fault codes.
- ✔ The airbag warning light is illuminated on the dash.
A Straightforward Guide to Installation
Replacing the BCM in these vans is a job most DIYers or any professional can handle quickly. For the 2004-2007 Express 1500 BCM, it’s typically located behind the center dash panel.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and allow the system to reset.
- Locate the Module: On Express and Savana vans, you’ll find the BCM mounted in the center dash area. Access may require removing a trim panel.
- Swap the Connectors: Carefully disconnect the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Plug them securely into your new, pre-programmed module.
- Secure the New BCM: Mount the new module in the original location.
- Reconnect and Test: Reconnect the battery terminal. Start the vehicle and test all functions—lights, locks, windows, wipers, and HVAC—to confirm the repair was successful.
Verified Vehicle Compatibility
This module is a direct replacement for part number 15194170 and is interchangeable with several other GM part numbers, including 15116066, 15136225, and 15198116. It offers broad compatibility across the GM truck and van lineup. While this page focuses on the 2004-2007 Express 1500 BCM, it also fits the following models:
GMC: Sierra 1500/2500/3500/Denali (03-07 Classic), Yukon/XL 1500/2500 (03-06), Savana Van 1500/2500/3500 (04-07 w/ opt PRP)
Cadillac: Escalade, ESV, EXT (03-06)
Hummer: H2 (03-07)
Note: For van models, this BCM is for vehicles equipped with the commercial tradesman package (option code PRP). Always verify your part number or consult your mechanic to ensure proper fitment.
Why is this module VIN programmed?
VIN programming loads your vehicle’s specific software and settings onto the module before it ships. This ensures all your original features work correctly right out of the box and eliminates the need for expensive dealership programming, making it a true plug-and-play solution.
Do I need to return my old BCM?
No. There is no core charge for this part. You can keep or dispose of your old module without any extra hassle or cost.
My airbag light is on after installation. What should I do?
This is a common security handshake procedure. If the airbag light is on, a technician will need to use a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ function. This syncs the new BCM with the airbag system and will turn off the light.
What tools do I need for installation?
For most applications, basic hand tools for removing dash trim panels are all that’s required. The installation itself is primarily unplugging the old module and plugging in the new one. The entire process often takes less than 15 minutes.
Will this fix my no-start problem?
If your no-start condition is caused by the BCM’s control over the anti-theft or security system (like Passlock or Passkey), then yes, replacing it with a correctly programmed module will resolve the issue. However, no-start conditions can have many causes, so proper diagnosis is key.