2007 – 2011 GMC SIERRA 3500 Body Control Module (BCM) 20939138 – Pre-Programmed to Your VIN with One-Year Warranty from Highway71AutoParts.com
Ever dealt with your GMC Sierra 3500’s power windows refusing to budge on a rainy day, or the door locks acting up right when you’re loading heavy cargo? As a seasoned mechanic who’s seen countless 2007-2011 GMC Sierra 3500 trucks roll into the shop with erratic electrical behaviors, I know how frustrating a failing body control module can be. Questions like “Why is my Sierra 3500’s HVAC blower intermittent?” or “How do I fix the airbag light in my 2007-2011 GMC Sierra 3500?” often point straight to the BCM. This OEM-spec 20939138 BCM, interchangeable with 25844480 and others like 25835966, arrives pre-programmed to your exact VIN for seamless integration. It restores control over lights, windows, locks, security, wipers, and climate systems in models including Chevrolet Silverado, Suburban, Tahoe, and GMC Yukon variants. With my years diagnosing these heavy-duty pickups, I’ve found this plug-and-play solution eliminates dealership visits, saving time and hassle while preventing cascading failures in demanding work environments.
Common Issues & How This Fixes Them
In the 2007-2011 GMC Sierra 3500, a compromised BCM often manifests as lost HVAC functionality, where the blower motor cuts out unpredictably—typically due to internal relay degradation from heat and vibration in these workhorses. I’ve encountered owners hauling trailers who suddenly face an airbag warning light flashing DTC B1001, stemming from communication breakdowns between the BCM and supplemental restraint system. Electrical gremlins like unresponsive power windows or door locks arise from corroded circuits, especially in regions with harsh winters, leading to security system glitches that might cause stalling or misfires if grounding isn’t solid. Other DTCs tied to body functions can trigger, mimicking bigger problems but often resolved by BCM replacement. This pre-programmed unit directly addresses these by recalibrating signals, ensuring reliable operation and averting issues like intermittent wipers during off-road hauls. From my experience, ignoring early signs risks broader electrical shorts, but swapping in this module restores smooth performance, enhancing safety for daily drives or job sites.
Key Features & Benefits
- VIN-Specific Programming: Tailored to your Sierra 3500’s VIN with the newest GM software, enabling instant compatibility and clearing persistent DTCs without extra tools or trips to the dealer.
- Robust Durability: Meets strict OEM guidelines for handling the rigors of heavy-duty use, backed by a full one-year warranty to cover any unexpected hiccups in tough conditions.
- Comprehensive Control: Oversees vital systems like lighting and security, delivering consistent results that minimize downtime and boost vehicle dependability.
- Interchange Flexibility: Works seamlessly with numbers such as 25835966, 15263363, and 20939137, making it a versatile choice for various GM trucks and SUVs.
- No-Hassle Policy: Skip the core charge—retain your old part, and enjoy straightforward installation that aligns with GM’s quality benchmarks for long-term reliability.
Easy Installation Guide
- Provide your VIN during purchase to ensure precise pre-programming for your 2007-2011 GMC Sierra 3500.
- Locate the BCM under the steering column—disconnect the battery first for safety, then remove the old unit by unplugging connectors and unbolting it (usually under 5 minutes).
- Install the new module, reconnect everything, and restore battery power.
- If a no-start condition occurs post-install, perform a theft deterrent relearn: Insert key, turn to ON for 10 minutes (until security light turns off), then off for 5 seconds—repeat three times if needed.
- Address any lingering airbag light by using a diagnostic scanner to execute the ‘Setup SDM Primary Key in BCM’ procedure.
- Check for brake pedal recalibration if braking feels off—consult your manual or a tech for model-specific steps to maintain safety.
Fitment Details
Compatible with:
2007 – 2011 GMC SIERRA 3500
Verify part numbers; provide VIN for confirmation. No core charge required.
Don’t let BCM troubles sideline your reliable Sierra 3500 any longer—grab this pre-programmed 20939138 today for restored functionality and peace of mind. With fast shipping and expert backing from Highway71AutoParts.com, you’re back on the job swiftly. Order now and experience the difference!