Get Your Hard-Working Truck Back on the Road
When your Silverado 3500 is down, your work stops. A failing Engine Control Module (ECM) can bring everything to a halt, causing frustrating no-start conditions, poor performance, and persistent check engine lights. This isn’t just an inconvenience; it’s a hit to your productivity. This direct-fit replacement ECM, part number 12633238, is the definitive solution to get your truck running reliably again. We take the guesswork out of the repair by pre-programming the module to your truck’s exact VIN before it ships, ensuring a straightforward installation process without a mandatory trip to the dealership.
Common Symptoms & Your Solution
If you’re experiencing issues like a rough idle, stalling, decreased fuel economy, or communication error codes like U0100, your ECM is the likely culprit. A failing module can also trigger a host of other diagnostic trouble codes (DTCs) and unpredictable engine behavior. This unit is professionally tested and programmed with the latest GM software updates to resolve those issues and restore the dependable performance you rely on. It’s the core of your engine’s management system, made simple.
Features & Benefits
- โ Plug & Play Ready: Arrives pre-programmed to your vehicle’s specific VIN. This critical step ensures proper communication with your truck’s other modules, saving you hundreds in dealer programming fees.
- โ Latest GM Software: We flash each module with the most current factory software available from GM. This helps optimize fuel efficiency, emissions, and overall engine performance.
- โ Guaranteed Compatibility: This ECM is a direct replacement for part numbers 12633238 and 12633055, and fits a wide range of GM trucks, vans, and SUVs listed in the fitment guide.
- โ Restored Performance: Solves common driveability problems, eliminates false check engine lights, and restores smooth engine operation, getting you back to work with confidence.
- โ Dependable Coverage: This unit is backed by our one-year replacement warranty.
Expert Insight: Why VIN Programming is Non-Negotiable
From over 20 years in diagnostics, I can tell you that installing an unprogrammed ECM in a modern GM vehicle is a recipe for failure. The ECM is the brain of the operation, communicating with the transmission, body control module, and anti-theft system. Our VIN-programming service isn’t just a convenienceโit’s essential. It syncs the module to your truckโs specific options and security credentials. Skipping this step means the vehicle won’t start or will run in a reduced power mode. We handle this for you, so you can focus on the physical installation and get back on the road without needing specialized scan tools.
Frequently Asked Questions
Do I need to do any programming after installation?
Because this ECM arrives programmed to your VIN, no further programming is typically required. However, you will likely need to perform a simple security relearn procedure, which can often be done without any special tools. This procedure pairs the new ECM to your vehicle’s anti-theft system and usually involves a sequence of key turns. Instructions are widely available online for your specific model.
How do I provide my Vehicle Identification Number (VIN)?
After you complete your purchase, simply send us a message with your 17-digit VIN. To ensure accuracy, please double-check the number from your driver’s side door jamb sticker or your vehicle’s registration/insurance card. We cannot ship the module until we receive your VIN.
Is this the correct ECM for my vehicle?
This module fits a wide variety of GM models. Please carefully review the detailed fitment list on this page. If you are still unsure, contact us with your VIN, and we will be happy to verify compatibility for you before you order.
My original part number is 12633055. Will this work?
Yes. This ECM, part number 12633238, is a fully compatible and updated replacement for the original 12633055 module. It will function identically once programmed to your vehicle.
What is the warranty on this part?
This unit is backed by our one-year replacement warranty. This provides coverage against defects for a full year from the date of purchase, giving you confidence in your repair.