Is Your Chevy Colorado Running Rough or Not Starting at All?
If you’re dealing with a frustrating check engine light, poor fuel economy, stalling, or a complete no-start situation in your 2009-2012 Colorado, a failing Engine Control Module (ECM) is a very likely culprit. Over my 20+ years turning wrenches, I’ve seen countless vehicle owners replace perfectly good sensors trying to solve an issue that was actually rooted in the vehicle’s computer. The ECM is the brain of your engine, and when it fails, it can send you on a wild goose chase, costing you time and money.
“A customer’s 2011 Colorado came into the shop last month with a persistent P0606 (ECM Processor Fault) code. He had already replaced the throttle body and MAF sensor, but the truck still ran poorly and would intermittently stall. After confirming power and grounds to the module were solid, we identified the original ECM as the source of the problem. A replacement, programmed module like this one had him back on the road in under an hour, with the issue completely resolved.”
The Direct-Fit Solution for Your 2009–2012 Colorado ECM
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a genuine GM module and flash it with the latest, most stable software update available from General Motors. By providing your vehicle’s VIN (Vehicle Identification Number) during checkout, you ensure the module arrives at your door perfectly matched to your truck’s specific configuration. This process eliminates the need for an expensive trip to the dealership for programming.
- ✔ Eliminate Common Failure Symptoms: Solves issues like harsh shifting, random warning lights, engine misfires, and communication errors with your scanner.
- ✔ VIN-Programmed for Your Truck: We handle all the programming. It arrives ready for a straightforward installation.
- ✔ Latest GM Software Updates: Pre-loaded with software that often corrects factory bugs and improves overall engine performance and efficiency.
- ✔ Cost-Effective Repair: Avoids the high labor costs and programming fees associated with a dealership visit.
Plug-and-Play Installation: No Dealer Visit Required
You can get your Colorado running right again from your own garage. Follow these simple steps for a successful installation:
- Safety First: Disconnect the negative terminal from your truck’s battery.
- Locate the ECM: On the 2009-2012 Colorado, the ECM is typically located on the right-hand (passenger) side of the firewall in the engine bay.
- Disconnect the Harnesses: Carefully release the locking tabs and unplug the electrical connectors from the old module.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket.
- Install the New Module: Bolt your new, pre-programmed ECM into place.
- Reconnect Everything: Plug the electrical harnesses firmly into the new module until they click. Reconnect the negative battery terminal.
- Perform Security Relearn (If Necessary): In most cases, the vehicle will start right up. Some GM vehicles may require a simple key-cycle security relearn procedure, which takes about 10-15 minutes and requires no special tools. Instructions are easy to find online or in your owner’s manual.
Expert Pro Tip from the Shop Floor
Before you plug in your new ECM, take a moment to inspect the vehicle’s harness connectors. Use a small flashlight to look for any signs of green or white corrosion on the pins or moisture inside the connector housing. A compromised harness can cause voltage spikes that damage the new module. If you see any corrosion, clean the pins carefully with a small brush and electrical contact cleaner before installation. This simple check protects your investment.
Guaranteed Compatibility
This ECM is a direct replacement for a wide range of GM vehicles and part numbers. It is fully interchangeable with the following service numbers: 12636659, 12639300, 1263605, 12628993, 12628911, 12625453, 12622175, 12630464, and 12678512. It fits numerous models including, but not limited to:
- ✔ 2009-2012 Chevrolet Colorado (2.9L, 3.7L)
- ✔ 2009-2012 GMC Canyon (2.9L, 3.7L)
- ✔ 2009-2010 Hummer H3 / H3T (3.7L)
- ✔ And many other GM cars, trucks, and SUVs from 2009-2011. Please verify the part number or contact us to confirm fitment.