2013 Sierra 3500 Body Control Module 15943678 Programmed To Your VIN VIN

2013 GMC SIERRA 3500 BCM (BCM) 15943678 – Pre-Programmed to Your VIN with One-Year Warranty from Highway71AutoParts.com

You’re hauling a heavy load in your 2013 GMC Sierra 3500 when suddenly the interior lights dim, power windows refuse to budge, and the security system throws a fit—sound familiar? These frustrating electrical glitches often stem from a failing body control module, leaving you stranded or dealing with constant dashboard warnings. The solution? Our OEM-spec GM BCM, part number 15943678 (interchangeable with 25844480 and others like 25835966), arrives pre-programmed to your exact VIN for seamless integration in 2007-2013 GM vehicles. This powerhouse oversees lights, locks, wipers, HVAC, and more, bringing back reliable performance to trucks like your Sierra 3500, plus models such as Chevrolet Silverado, Tahoe, Suburban, and Cadillac Escalade variants. With expert programming using the latest GM software, it eliminates dealership visits and clears persistent DTCs right out of the box, saving you time and hassle on the road or job site.

Key Features & Benefits

• Ready-to-Install VIN Programming: Tailored to your Sierra 3500’s specifics with current GM updates, ensuring instant compatibility and no extra coding—perfect for quick fixes that resolve codes like B1001 without delays.
• Robust Electrical Management: Handles everything from door locks to climate controls, boosting overall vehicle reliability and preventing cascading failures in demanding heavy-duty applications.
• Assured Durability: Meets strict OEM guidelines with a full one-year warranty, standing up to rugged truck use whether you’re towing trailers or navigating tough terrain.
• Wide Interchangeability: Swaps easily with numbers including 15263363, 15878753, 15926094, and more, making it a versatile choice for repairs across GM’s truck and SUV lineup.
• No-Hassle Policy: Skip the core return fees—keep your old module, and enjoy straightforward installation that gets you back in action fast.

Common Issues & How This Fixes Them

Dealing with a malfunctioning BCM in your 2013 GMC Sierra 3500 can turn a reliable workhorse into a headache. One frequent problem is erratic HVAC behavior, like the blower motor cutting out mid-drive—often caused by internal module corrosion or voltage spikes from rough off-road conditions. This leads to uncomfortable cabins and potential safety distractions. Our pre-programmed BCM restores steady control, drawing from real cases where truck owners fixed intermittent blowers by addressing underlying ground faults during swap-out. Another issue: airbag lights triggering DTC B1001, stemming from communication breakdowns that compromise safety systems. We’ve seen this in high-mileage Sierras exposed to moisture; replacing with our VIN-matched unit clears the code and reinstates proper sensor links. Electrical woes, such as unresponsive power windows or flickering lights, usually trace back to faulty relays inside the module—exacerbated by heavy towing vibrations. Security glitches might cause no-starts or stalling, linked to anti-theft mismatches. By installing this BCM, you eliminate these by ensuring synchronized body functions, with added tips like checking harness connections to avoid repeats. In my experience diagnosing GM trucks, these fixes not only solve symptoms but enhance long-term dependability, reducing downtime for fleet operators or daily drivers.

Easy Installation Guide

1. Provide your VIN during purchase to ensure precise pre-programming for your 2013 Sierra 3500.
2. Locate the BCM under the steering column—disconnect the battery first for safety to prevent electrical shorts.
3. Remove the old module by unplugging connectors and unbolting it, typically in under five minutes with basic tools.
4. Install the new BCM, reconnect everything, and restore battery power—it’s plug-and-play thanks to VIN setup.
5. Perform post-install checks: If no-start occurs, initiate theft relearn by cycling the key from off to run (without starting) 3-4 times, waiting 10 minutes per cycle until the security light extinguishes.
6. For lingering airbag lights (like DTC B1001), use a diagnostic scanner to run the ‘Setup SDM Primary Key in BCM’ procedure; some models may need brake pedal recalibration for optimal safety—consult your manual or a pro if unsure.

Fitment Details

Regain control of your 2013 GMC Sierra 3500’s vital systems with this dependable BCM—don’t let electrical gremlins slow you down. Order now from Highway71AutoParts.com for swift shipping and expert guidance, tailored to your truck’s needs.