Tired of Electrical Gremlins in Your GM Truck?
Is your trusty Sierra, Silverado, or S-Series truck starting to act possessed? Flickering lights, power windows with a mind of their own, or a security light that won’t turn off are more than just annoyances—they’re signs of a failing Body Control Module (BCM). This central command unit for your vehicle’s electronics can cause a host of frustrating problems when it goes bad. Stop chasing electrical ghosts and get the definitive, hassle-free solution. This module is the key to restoring the dependable functionality you rely on every day.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a faulty BCM is the most likely culprit. This pre-programmed module is designed to be the direct solution, getting your truck back to 100% without a mandatory trip to the dealership for expensive programming.
- Intermittent or non-working power windows and door locks
- Erratic interior dome lights or dashboard backlighting
- The security or anti-theft light stays on, preventing the truck from starting (common Passlock issue)
- Horn honking unexpectedly or not working at all
- Inconsistent windshield wiper operation
This professionally programmed 1999-2000 Sierra 2500 Body Control Module arrives ready for installation, flashed with the latest GM software updates and coded specifically to your truck’s VIN.
Features & Benefits
- âś” Plug & Play Installation: This BCM is pre-programmed to your vehicle’s exact VIN. This critical step is done for you, saving you from the high costs and scheduling hassles of a dealership visit.
- âś” Restores Full Functionality: Get your power accessories, lighting, and security systems working correctly again. Regain control over the essential features of your truck.
- âś” Direct-Fit Replacement: Engineered to match the original factory specifications for part numbers like 16257125, 19153625, and more, ensuring a perfect fit and seamless integration.
- âś” No Core Charge: You are not required to send your old module back. This saves you time, return shipping costs, and the hassle of managing a core deposit.
- âś” This unit is backed by our one-year replacement warranty.: Drive with confidence knowing your purchase is protected.
Expert Insight: The GM Passlock Security Puzzle
Many owners of late 90s and early 2000s GM trucks will eventually face the dreaded flashing “Security” light. This is often the Passlock anti-theft system failing. While many might suspect the ignition switch, a failing BCM is a very common root cause. The BCM is responsible for reading the security signal and allowing the fuel injectors to operate. When it fails internally, it can no longer validate the signal, leaving you stranded. Installing a correctly programmed 1999-2000 Sierra 2500 Body Control Module is often the permanent fix for this incredibly frustrating and common issue.
Frequently Asked Questions
What exactly does the Body Control Module do?
The BCM is essentially the brain for your vehicle’s body electronics. It doesn’t control the engine, but it manages dozens of other functions like power windows, door locks, interior and exterior lighting, the security system, warning chimes, and windshield wipers. When it fails, any of these systems can become unreliable.
Is this module difficult to install?
For most models listed, the BCM is located under the driver’s side or center of the dashboard and is accessible with basic hand tools. Because we program it to your VIN before shipping, the most difficult part of the job is already done. You simply disconnect the battery, swap the module, and reconnect everything. However, please review the potential post-installation procedures.
How do I provide my vehicle’s VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information, as the programming is specific to your truck.
What if my airbag light comes on after installation?
In some cases, the new BCM may need to be synced with the airbag system (SDM). If the airbag warning light is on after you install the part, a ‘Setup SDM Primary Key in BCM’ procedure will need to be performed by a mechanic with a professional-grade scan tool.
Will this fix the “Security” light on my dashboard?
Yes, a failing BCM is one of the most common causes of a persistent “Security” light and no-start condition in these GM trucks. This programmed 1999-2000 Sierra 2500 Body Control Module is the correct solution for this specific problem.
Do I have to send my old part back?
No. There is no core charge or requirement to return your original module. You can keep it or dispose of it at your convenience.