Restore Your Truck’s Electrical System with a Plug-and-Play Solution
If you’re dealing with bizarre electrical issues in your 2002-2005 Blazer S10 or Jimmy S15, you’re not alone. Flickering interior lights, windows that won’t cooperate, a security light that stays on, or a truck that refuses to start can all point to a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can create a cascade of frustrating and hard-to-diagnose problems. This is the reliable, straightforward fix you’ve been looking for.
We take the guesswork and dealer expense out of the equation. Simply provide your vehicle’s VIN after purchase, and our technicians will program this BCM with the latest GM software specific to your Blazer or Jimmy. It arrives at your door ready to install, eliminating the need for costly dealership programming or specialized tools. This is the most efficient way to get your truck back to 100% functionality.
A Technician’s Notebook: The Phantom Drain
A customer brought in his ’04 Blazer S10, convinced it needed its third battery in a year. The truck would be dead after sitting for a day or two. Standard parasitic draw tests were inconclusive at first. Everything seemed fine until we monitored the interior lighting circuit controlled by the BCM. We found the module was intermittently waking up and activating circuits overnight, draining the battery. It’s a classic BCM failure I’ve seen dozens of times. A simple swap with a correctly programmed module like this one solved the problem permanently. The customer was thrilled to finally have a reliable starter again.
Is Your Blazer or Jimmy Showing These Symptoms?
- âś” Intermittent or non-functional power windows, door locks, or mirrors.
- âś” The security or anti-theft light stays illuminated, often causing a no-start condition.
- âś” Erratic interior or exterior lighting behavior (lights staying on, flickering, or not working).
- âś” Gauges on the instrument cluster behaving strangely or not working at all.
- âś” Problems with the radio or HVAC controls.
- âś” Communication error codes, such as U-series codes (e.g., U0140), indicating a loss of communication with the BCM.
A Straightforward Guide to Installation
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before starting work.
- Locate the BCM: On the Blazer S10/Jimmy S15, the BCM is typically located in the center dash area, often accessible by removing the lower dash panel or glove box.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location. Firmly reconnect all electrical connectors, ensuring they click into place.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Final Checks: Start the vehicle and test all body functions—windows, locks, lights, wipers, etc. Note that some post-install procedures may be necessary.
Important Post-Installation Information
While this module is programmed for a direct installation, some vehicle systems may require a recalibration or sync procedure with a professional scan tool. This is normal for modern vehicle electronics.
- Airbag System Sync: If your airbag warning light is on after installation, a “Setup SDM Primary Key in BCM” procedure is required to sync the modules.
- Brake Pedal Position Relearn: Depending on your specific model and options, a brake pedal position sensor relearn might be needed for proper brake light and traction control operation.
Will This Fit My Truck or Van?
This BCM is a direct replacement for part number 15095334 and is compatible with several other part numbers including 15063578, 15081796, 19208537, DKAK, and DPNU. It fits a wide range of GM vehicles. Please verify your part number or consult the list below.
BLAZER S10 (2002-2005)
S10 PICKUP (2002-2004)
ASTRO VAN (2002-2005)
AVALANCHE 1500 (2002)
SILVERADO 1500/2500/3500 (2002)
SUBURBAN 1500/2500 (2002)
TAHOE (2002)
GMC:
JIMMY S15 (2002-2005)
SONOMA (2002-2004)
SAFARI VAN (2002-2005)
SIERRA 1500/2500/3500/DENALI (2002)
YUKON / YUKON XL 1500/2500 (2002)
Cadillac:
ESCALADE (2002)
Note: Compatibility can depend on specific options. Matching your original part number is the best way to ensure fitment.
Frequently Asked Questions
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module, which can be helpful for future reference if needed.
Is this BCM truly plug-and-play?
Yes, it is. We program it using your vehicle’s VIN, so it’s ready for installation right out of the box. This saves you a trip to the dealer for expensive programming. However, as noted, certain systems like the airbag or brake sensor may require a simple relearn procedure with a scan tool.
What information do you need from me?
After you complete your purchase, we will need the 17-digit Vehicle Identification Number (VIN) from your truck. This is usually found on the driver’s side dashboard (visible through the windshield) or on the driver’s door jamb sticker.
What happens if my airbag light comes on after installation?
This is a known possibility. The new BCM needs to be electronically ‘introduced’ to the airbag’s Sensing and Diagnostic Module (SDM). A professional mechanic can perform the ‘Setup SDM Primary Key in BCM’ procedure with a bi-directional scan tool to resolve this.
Will this fix my Passlock security system issue?
In many cases, yes. The BCM is a critical component of the GM Passlock anti-theft system. A failing BCM is a very common cause of security-related no-start problems in these vehicles. This programmed module restores that functionality.