Restore Your Truck’s Power and Reliability
Is your Silverado, Sierra, or Express van suddenly acting up? Experiencing frustrating issues like random stalling, a persistent Check Engine Light, poor fuel mileage, or a complete no-start condition? As a technician with over 20 years of experience, I’ve seen these symptoms countless times, and they often point directly to a failing Engine Control Module (ECM). The ECM is the brain of your vehicle’s engine, and when it falters, it can cause a cascade of problems that are difficult to diagnose. Don’t let a faulty computer keep your workhorse off the road. This pre-programmed ECM is the reliable, straightforward solution you need.
We take the guesswork and high dealership costs out of the equation. Simply provide us with your vehicle’s VIN (Vehicle Identification Number) during checkout, and our experts will flash this module with the latest, most stable GM software specific to your truck. This isn’t just a replacement part; it’s a direct-fit solution that arrives ready to install, restoring the precise fuel delivery, ignition timing, and transmission shifting your vehicle had when it was new. This is the most efficient way to solve complex electronic issues and get your truck running right again.
A Technician’s Notebook: The Intermittent Stall
I had a 2010 Silverado 3500 HD in the bay that was a real head-scratcher. The owner, a contractor, said it would run perfectly for days and then stall without warning at a stoplight. No consistent codes, just a random P0606 (ECM Processor Fault) that would pop up and disappear. We checked wiring, grounds, and sensors for hours. On a hunch, I tapped the ECM casing with a screwdriver handle while the engine was idling, and it sputtered. That confirmed it—an internal solder joint on the processor board was failing intermittently with heat and vibration. We installed one of these pre-programmed modules, and the truck has been running solid for him ever since. Sometimes the simplest solution is the right one.
Is Your GM Vehicle Showing These Symptoms?
A failing ECM can manifest in many ways. If you’re noticing any of the following, it’s a strong indicator that your engine’s computer needs attention. In my shop, these are the classic signs we look for before recommending a replacement 2010 Silverado 3500 ECM or a compatible module for other GM vehicles.
- ✔ Check Engine Light is illuminated with codes like P0601, P0602, P0606, or U0100.
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained drops in fuel economy.
- ✔ Rough or erratic idling and stalling.
- ✔ Harsh or delayed automatic transmission shifts.
- ✔ Apparent loss of engine power and throttle response.
- ✔ Communication errors with diagnostic scan tools.
A Straightforward Guide to Installation
Replacing the ECM on most of these GM trucks and vans is a job most DIYers can handle with basic tools. Our pre-programmed module eliminates the need for a trip to the dealer for expensive flashing. Follow these steps for a smooth installation.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes for the system capacitors to discharge.
- Locate the ECM: On most Silverado/Sierra trucks and SUVs, the ECM is located in the engine bay on the driver’s side, near the firewall or fender. On Express/Savana vans, it’s typically on the LH rear side of the engine compartment.
- Disconnect the Connectors: Carefully release the locking tabs on the wiring harness connectors and pull them straight out from the module. Do not force them. Inspect the pins for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. It’s usually held in place by a few small bolts.
- Install the New ECM: Mount your new, pre-programmed ECM onto the bracket and secure it. Reconnect the wiring harnesses, ensuring they click firmly into place and the locking tabs are engaged.
- Reconnect the Battery: Reattach the negative battery terminal. The vehicle may need to complete a security relearn procedure, which typically involves cycling the key on and off. Consult your owner’s manual for specific instructions if needed.
- Start and Verify: Start the engine and let it idle for a few minutes. Check for any warning lights and take the vehicle for a test drive to confirm that all issues have been resolved.
Will This Fit My Vehicle?
This ECM, part number 12633238 (also replaces 12633055), is compatible with a wide range of GM vehicles. We’ve compiled the fitment data below. To ensure a perfect match, please verify your vehicle’s year, make, model, and engine options, and provide your VIN upon purchase for programming.
CAPRICE 11-17 (6.0L)
CORVETTE 10-13 (6.2L, 7.0L)
SS CAPRICE 14-17
AVALANCHE 1500 10-13
ESCALADE & ESV & EXT 10-14
EXPRESS 1500 VAN 10-14 (5.3L)
EXPRESS 2500/3500 VAN 10-15 (4.8L, 6.0L)
SAVANA 1500 VAN 10-14 (5.3L)
SAVANA 2500/3500 VAN 10-15 (4.8L, 6.0L)
SIERRA 1500 PICKUP 10-13 (4.8L, 5.3L, 6.2L)
SIERRA 2500 PICKUP 10 (6.0L)
SIERRA 3500 PICKUP 10 (6.0L)
SIERRA DENALI 10 & 1500 11-13
SILVERADO 1500 PICKUP 10-13 (4.8L, 5.3L, 6.2L)
SILVERADO 2500 PICKUP 10 (6.0L)
SILVERADO 3500 PICKUP 10 (6.0L)
SUBURBAN 1500 10-14
SUBURBAN 2500 10-13
TAHOE 10-14 (w/o hybrid)
YUKON 10-14 (w/o hybrid)
YUKON XL 1500 10-14
YUKON XL 2500 10-13
Frequently Asked Questions
Frequently Asked Questions
Do I need to do any programming myself?
No. This ECM comes fully programmed to your vehicle’s specific VIN with the latest GM software updates. It is ready for installation right out of the box.
Why do you need my VIN?
Your VIN is essential for us to load the correct software for your vehicle’s engine, transmission, and factory options. This ensures perfect compatibility and function without any additional programming.
Is this a simple plug-and-play installation?
Yes, for the vast majority of vehicles listed. Once you install the module and reconnect the battery, you’re ready to go. In some rare cases, a security or crank relearn procedure may be necessary, which can be done without special tools.
Will this fix my Check Engine Light?
If the Check Engine Light is caused by an internal failure of the ECM (like codes P0601 or P0606), then yes, this part will resolve the issue. Always ensure you have properly diagnosed the problem before ordering.
How do I find my part number to confirm a match?
The part number is printed on a sticker on your original ECM. This module replaces part numbers 12633238 and 12633055. However, our VIN programming ensures it will work even if your original number differs slightly, as long as your vehicle is on the compatibility list.