Is Your 2010 Avalanche 1500 Acting Possessed?
If your truck’s electronics have a mind of their own, you’re not alone. As a mechanic with over two decades of diagnostic experience, I’ve seen countless GMT900 trucks like yours develop bizarre electrical gremlins. The lights flicker, the power locks work intermittently, the radio acts up, or you get strange warnings on the dash. More often than not, the culprit is a failing Body Control Module (BCM). This module is the central nervous system for your truck’s comfort and convenience features, and when it goes, it can cause a cascade of frustrating problems.
Common Symptoms of a Failing BCM:
- โ Intermittent or non-functional power windows, door locks, or mirrors.
- โ Headlights, taillights, or interior lights staying on or not turning on at all.
- โ Erratic instrument cluster behavior, with gauges dropping out or warning lights appearing randomly.
- โ The security system preventing the truck from starting (Passlock issues).
- โ Unresponsive key fob or remote start functions.
From the Shop Floor: “A customer’s 2010 Avalanche 1500 came in last week with a classic ‘dead battery’ complaint. He’d replaced the battery twice, but it kept dying overnight. We tested the alternator and batteryโboth were fine. A parasitic draw test led us straight to the BCM. It wasn’t fully ‘sleeping’ after the truck was turned off, causing a slow drain that killed the battery. Replacing the BCM solved the problem completely. It’s a common issue that gets misdiagnosed all the time.”
The Direct-Fit, Programmed Solution
Don’t waste time and money at the dealership. This Body Control Module, part number 25910474, is the reliable, cost-effective solution you need. The biggest headache with BCM replacement is the programmingโbut we handle that for you. Simply provide your vehicle’s 17-digit VIN during checkout, and our technicians will flash the module with the latest, most stable GM software specific to your 2010 Avalanche 1500. It arrives at your door ready for installation, saving you a trip to the dealer and expensive programming fees.
Simple Installation Guide for your 2010 Avalanche 1500 BCM
Replacing the BCM is a straightforward job for a confident DIYer. In the Avalanche, it’s typically located under the driver’s side of the dashboard, near the steering column.
- Safety First: Disconnect the negative terminal from your truck’s battery and wait at least 10 minutes to allow all systems to discharge.
- Access the Module: You may need to remove the lower dash panel or knee bolster for access. It’s usually held in by a few clips or screws.
- Locate the BCM: Identify the old BCM. It will have several large multi-pin electrical connectors attached to it.
- Swap the Connectors: Carefully press the release tabs on each electrical connector and pull them straight out from the old module. Transfer them to the corresponding ports on your new, pre-programmed BCM. Ensure they click securely into place.
- Mount the New BCM: Secure the new module in the mounting bracket.
- Reassemble & Reconnect: Reinstall any panels you removed and reconnect the negative battery terminal.
Important Post-Installation Steps
Getting the new module in is only part of the job. To ensure full functionality and safety, a couple of final procedures are required. You will need a professional-grade diagnostic scan tool for these steps.
- Airbag System Reset: After installation, the airbag warning light will be on. This is normal. You must perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the new BCM with the airbag system.
- Brake Pedal Position Sensor Relearn: Some vehicles require the Brake Pedal Position (BPP) sensor to be recalibrated after a BCM replacement. This ensures the brake lights and stability control systems function correctly.
Guaranteed Compatibility
This module is a direct replacement for a wide range of GM vehicles. It is compatible with part number 25910474 and supersedes numerous other part numbers, including: 15892622, 20815898, 22860591, and many more. While this listing is focused on the 2010 Avalanche, it also fits many other GM trucks, vans, and SUVs from this era, ensuring you get the correct, high-quality part for your repair.