Is Your GM Truck or SUV Acting Up?
If you’re dealing with frustrating issues like a persistent Check Engine Light, a no-start condition that leaves you stranded, erratic engine performance, or mysterious communication error codes, the problem often points directly to a failing Engine Control Module (ECM). As the brain of your vehicle, when the ECM falters, it can cause a cascade of problems that are often misdiagnosed, costing you time and money on unnecessary parts. In my 20+ years as a technician, I’ve seen countless drivers replace sensors and wiring, only to discover the core issue was the computer itself.
Real-World Diagnostic Story
“A customer’s 2009 Tahoe came into the shop last month with a no-start condition and a whole list of U-codes (communication faults). The previous mechanic had already replaced the battery and checked all the main fuses. After hooking up my scan tool, I noticed I couldn’t communicate with the ECM at all, but all other modules were responsive. This is a classic sign. We confirmed power and ground at the ECM connectors were good, which immediately isolated the failure to the module itself. A new, programmed ECM like this one had the truck running perfectly in under an hour.”
The Direct Solution: A VIN-Programmed 2009–2010 Tahoe Engine Computer
This isn’t just a replacement part; it’s a complete, ready-to-install solution for your vehicle. We take a reliable, tested ECM and flash it with the latest official GM software, specifically matched to your vehicle’s unique Vehicle Identification Number (VIN). This critical step ensures that all systems—from the transmission to the anti-theft system—communicate perfectly right out of the box.
- ✔ Eliminate Guesswork: Solves common ECM failure symptoms like harsh shifting, poor fuel economy, and stalling.
- ✔ Save Hundreds: Skip the expensive dealership programming fees and long wait times. This module arrives ready for installation.
- ✔ Latest Software: Programmed with the newest GM updates to improve performance and address known factory issues.
- ✔ Guaranteed Compatibility: By using your VIN, we ensure this ECM is a perfect match for your vehicle’s specific options and systems.
Plug-and-Play Installation: No Dealer Visit Required
Installing your new engine computer is a straightforward process that a confident DIYer or any professional mechanic can complete. Here’s a general guide:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the ECM: On most 2009-2010 GM trucks and SUVs like the Tahoe, the ECM is located in the engine bay on the driver’s side, near the firewall or fender.
- Disconnect Connectors: Carefully release the locking tabs on the wiring harness connectors and pull them straight out from the module. Inspect the pins for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed ECM and securely reconnect the wiring harnesses. You should hear a ‘click’ as they lock into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Security Relearn (If Necessary): In some cases, a simple 10-15 minute security relearn procedure may be required. This involves turning the key to the ‘ON’ position for 10 minutes, then ‘OFF’, and repeating two more times. Your vehicle will then start and run normally.
Guaranteed Fitment for Your Vehicle
This ECM, part number 12629009, is a direct replacement for service number 12625455. Please verify your part number or provide your VIN to confirm compatibility. This unit fits a wide range of GM vehicles, including:
- AVALANCHE 1500: 2009, 2010 (ID 12625455)
- CORVETTE: 2009 (Base)
- ESCALADE / ESV / EXT: 2009, 2010 (6.2L, ID 12625455)
- EXPRESS / SAVANA VANS (1500, 2500, 3500): 2009 (4.8L, 5.3L, 6.0L)
- G6: 2009 (3.5L, 3.9L)
- G8: 2009 (ID 12625455)
- HUMMER H2: 2009
- IMPALA: 2009 (3.5L, 3.9L)
- MALIBU: 2009 (3.5L)
- SIERRA / SILVERADO (1500, 2500, 3500): 2009-2010 (Various engines, check options)
- SUBURBAN (1500, 2500): 2009, 2010 (ID 12625455)
- TAHOE: 2009, 2010 (w/o hybrid, ID 12625455)
- VUE: 2010 (3.5L)
- YUKON / YUKON XL (1500, 2500): 2009, 2010 (w/o hybrid, ID 12625455)
IMPORTANT: After purchase, please send us your vehicle’s 17-digit VIN. We cannot ship your order until we have this information to program the module correctly.