2013 GMC SIERRA 3500 Body Control Module (BCM) 20939137 – Pre-Programmed to Your VIN with One-Year Warranty from Highway71AutoParts.com
Ever hit the road in your 2013 GMC Sierra 3500 for a heavy towing job, only to deal with flickering lights, unresponsive door locks, or an airbag warning light that won’t quit? These frustrating electrical gremlins often point to a failing body control module, disrupting everything from HVAC performance to security features. As a seasoned mechanic who’s diagnosed countless GM trucks, I’ve seen how a faulty BCM can turn a reliable workhorse into a headache, especially during long hauls or harsh weather. The solution? Our OEM-spec GM BCM, interchangeable with 20939137, arrives pre-programmed to your exact VIN for seamless integration. This plug-and-play unit restores control over lights, windows, locks, wipers, and more, clearing pesky DTC codes like B1001 without dealership visits. Compatible across 2007-2013 GM models including Silverado, Tahoe, Yukon, and Escalade variants, it ensures your Sierra 3500 handles demanding tasks with improved reliability. Beyond basic fixes, this module enhances overall electrical stability, preventing issues like intermittent blower failures that plague cold-weather driving in trucks like yours.
Key Features & Benefits
- VIN-Specific Programming: Tailored to your 2013 Sierra 3500’s VIN with the latest GM software, delivering instant compatibility and eliminating extra programming costsโperfect for DIYers avoiding dealer fees.
- Robust Electrical Control: Manages body functions like power accessories and security, boosting towing reliability by resolving grounding problems that cause stalling or misfires in heavy-duty scenarios.
- Built for Durability: Meets strict OEM standards with a full one-year warranty, standing up to the rigors of daily hauling or off-road use without future breakdowns.
- Interchangeable Design: Swaps easily with numbers like 25844480, 25835966, and others, making it ideal for quick repairs that clear diagnostic trouble codes and restore smooth operation.
- No-Hassle Policy: Skip core charges entirelyโkeep your old part, and enjoy fast shipping for minimal downtime on your GMC truck.
Common Issues & How This Fixes Them
In my years working on GM vehicles, I’ve encountered owners of 2013 Sierra 3500 trucks baffled by symptoms like non-functional power windows or erratic interior lights, often triggered by moisture ingress or worn circuitry in the BCM. This can lead to broader problems, such as security system glitches causing no-start conditions during critical towing jobs. Another frequent complaint? Intermittent HVAC blower operation, which might stem from faulty module relays, leaving you sweating on hot days or freezing in winter. Then there’s the airbag warning light with DTC B1001, a safety red flag that could indicate communication failures between modules. Replacing with our pre-programmed 20939137 BCM directly addresses these by recalibrating body electronics, clearing codes, and preventing recurrence through better grounding checks. For instance, one client hauling equipment across state lines fixed chronic door lock failures that risked theft, regaining peace of mind. Expert tip: Always scan for underlying issues like corroded connectors before swapโ this proactive step can improve long-term reliability and avoid repeated diagnostics.
Easy Installation Guide
- Provide your VIN during purchase to ensure precise programming for your 2013 GMC Sierra 3500.
- Locate the BCM under the steering columnโdisconnect the battery first for safety to prevent electrical shorts.
- Remove the old module by unplugging connectors and mounting bolts; install the new one in reverse order, typically in under 5 minutes.
- After installation, if the airbag light persists (e.g., DTC B1001), use a qualified scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure for reset.
- Some models may need brake pedal recalibrationโconsult your manual or a tech for optimal braking safety.
- For theft relearn (only if no-start occurs): Cycle the key from off to run three times, waiting 10 minutes each, to sync the system without tools.
Fitment Details
Compatible with:
2013 GMC SIERRA 3500
Verify part numbers; provide VIN for confirmation. No core charge required.
Don’t let BCM woes sideline your 2013 GMC Sierra 3500โgrab this pre-programmed 20939137 module today to reclaim reliable performance and clear those nagging DTC codes. With expert support and swift delivery from Highway71AutoParts.com, you’ll be back to confident towing in no time. Order now and drive with assurance!