Restore Full Control Over Your GM Vehicle’s Electronics
Are you battling frustrating electrical gremlins in your GM truck, van, or SUV? Flickering lights, malfunctioning power windows or locks, a security light that won’t turn off, or even a vehicle that refuses to start can all point to a single culprit: a failing Body Control Module (BCM). This isn’t just an annoyance; it’s a critical component failure that can compromise your vehicle’s functionality and security. This replacement 2002-2005 GM BCM is the direct, reliable solution you need to get your vehicle back in perfect working order.
We take the guesswork and dealer hassle out of the repair. Simply provide your vehicle’s VIN after purchase, and our technicians will program the module with the latest GM software specifically for your vehicle. This means no expensive trips to the dealership for programming—it arrives ready to install. Plus, there’s no core charge, so you can keep your old part.
Case Study: A Tricky Diagnosis
A customer brought in a 2002 Silverado 2500 with a bizarre complaint: the radio would turn on by itself, the dome light would stay on, and the power locks worked intermittently. They had already replaced the battery and checked all the fuses. After connecting my scan tool, I noticed several ‘Loss of Communication’ codes (U-codes) pointing to the BCM. These modules are the central hub for body electronics, and when they start to fail internally, they create these ghost-like problems. Installing a VIN-programmed 2002-2005 GM BCM resolved all issues in under an hour, saving the customer hundreds compared to a dealership repair.
Is Your GM Vehicle Showing These Symptoms?
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is likely the solution you need.
- ✔ Power windows, mirrors, or door locks operating erratically or not at all.
- ✔ Interior or exterior lights staying on or not turning on.
- ✔ The security system light is illuminated, or the alarm goes off randomly.
- ✔ The instrument cluster gauges behave strangely or stop working.
- ✔ The radio or climate controls are unresponsive.
- ✔ The vehicle won’t start, and you hear a rapid clicking sound (not a dead battery).
- ✔ Diagnostic Trouble Codes (DTCs) related to communication errors, like U0140, U0155, or B1001.
Your Straightforward BCM Installation Guide
Installing your new BCM is a manageable job for a DIYer with basic tools. The location varies slightly by model, but the process is similar.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: On most trucks and SUVs (Silverado, Sierra, Tahoe), it’s under the driver’s side of the dashboard, near the steering column. On vans (Astro, Safari) and S-series trucks (Blazer, S10), it’s often behind the center dash panel.
- Remove Trim Panels: Carefully remove any plastic trim panels necessary to access the module. These are usually held by clips or a few screws.
- Disconnect and Remove: Unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Then, unbolt or unclip the module from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed module in the same location and reconnect all the electrical harnesses. Ensure they click securely into place.
- Post-Installation Steps: Reconnect the battery. Start the vehicle and check for proper function of all body electronics. In some cases, as noted below, additional relearn procedures may be needed with a scan tool if specific warning lights appear.
Important Post-Installation Information
While this module is programmed for your VIN, some vehicle systems may require a ‘handshake’ with the new BCM. This is normal.
- Airbag System Sync: If the airbag warning light is on 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 certain models, a brake pedal position sensor relearn may be required to ensure brake lights and stability control systems function correctly.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a certified technician if you are unsure about any step.
Verified Fitment for Your GM Vehicle
This 2002-2005 GM BCM is a direct replacement for part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. It is guaranteed to fit the following vehicles:
- Chevrolet Avalanche 1500: 2002
- Chevrolet Blazer S10 / GMC Jimmy S15: 2002-2005
- Chevrolet S10 / GMC Sonoma: 2002-2004
- Chevrolet Silverado & GMC Sierra 1500/2500/3500: 2002
- Chevrolet Suburban & GMC Yukon XL 1500/2500: 2002
- Chevrolet Tahoe & GMC Yukon: 2002
- Cadillac Escalade: 2002
- GMC Sierra Denali: 2002
- Chevrolet Astro & GMC Safari Van: 2002-2005