Restore Your Truck’s Core Performance and Reliability
Is your 2008 Sierra 1500 pickup suddenly unreliable? Experiencing frustrating issues like random stalling, a complete no-start condition, or a check engine light that won’t go away? Before you spend a fortune at the dealership, the problem is very likely a failing Engine Control Module (ECM). As the computer brain of your truck, a faulty ECM can cause a cascade of confusing problems, from poor fuel economy and erratic shifting to complete communication loss with your scan tool. This replacement ECM, part number 12622141, is the direct, dependable solution to get your truck back on the road.
A Technician’s Notebook: The Phantom Electrical Gremlin
I remember a 2008 Silverado that came into my bay with a classic case of ECM failure. The owner had already replaced the battery and alternator, chasing what he thought was a charging issue. The truck would start fine some days, and not at all on others. When it did run, the transmission would shift hard. His scan tool would intermittently fail to connect. These are hallmark signs of an internal ECM breakdown. The main processor was failing under heat, causing intermittent connection loss. We installed a VIN-programmed module just like this one, and it was like giving the truck a new brain. All the phantom issues vanished instantly. This isn’t just a part; it’s a permanent fix for some of the most frustrating vehicle problems.
Is Your Truck Showing These Symptoms?
- ✔ Check Engine Light is illuminated with communication-related Diagnostic Trouble Codes (DTCs) like P0601, P0606, or U0100.
- ✔ Your vehicle will not start and the starter does not engage (no-crank).
- ✔ Intermittent stalling or hesitation while driving.
- ✔ Noticeably decreased fuel mileage.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Your scan tool cannot communicate with the PCM.
The Critical Advantage: VIN-Programmed and Ready to Install
The biggest hurdle in replacing a modern ECM is the programming. Without it, the vehicle won’t start or run correctly. We eliminate that step for you. Simply provide your vehicle’s 17-digit VIN during checkout, and our technicians will flash this module with the latest, most stable software directly from GM. This ensures perfect compatibility with your truck’s specific systems, including the engine, transmission, and anti-theft system. This is a true plug-and-play solution, saving you the time, expense, and hassle of a dealership visit for programming.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your truck’s battery before beginning any electrical work.
- ✔ Locate the ECM: On your 2008 Sierra 1500, the ECM is located in the engine bay on the driver’s side, typically under or near the battery tray.
- ✔ Disconnect the Connectors: Carefully release the locking tabs on the electrical wiring harnesses and pull them straight out from the module. Avoid pulling on the wires themselves.
- ✔ Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware as you will need it for the new module.
- ✔ Install the New Module: Mount your new, pre-programmed ECM and securely tighten the bolts. Reconnect the wiring harnesses, making sure they click firmly into place.
- ✔ Reconnect the Battery: Reattach the negative battery terminal. In some cases, a security relearn procedure may be necessary, which typically involves cycling the key in the ignition. Your truck is now ready to start.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 12612384, 12622141, and 12617568. It is guaranteed to fit the following vehicles and configurations:
SIERRA 2500 PICKUP 08 Electronic Control Module; (LH front under battery), 6.0L
SUBURBAN 1500 08 Electronic Control Module; (LH front under battery)
AVALANCHE 1500 08 Electronic Control Module; (LH front under battery)
SUBURBAN 2500 08 Electronic Control Module; (LH front under battery)
TORRENT 08-09 Electronic Control Module; (LH engine compartment), 3.4L
VUE 08-09 Electronic Control Module; 3.5L
AURA 08 Electronic Control Module; (RH firewall), 3.5L
SIERRA 3500 PICKUP 08 Electronic Control Module; (LH front under battery), 6.0L
CTS 08 Electronic Control Module; (RH front engine compartment), (3.6L), VIN 7 (8th digit), ID 12612384
CAPRICE 11 Electronic Control Module; ID 12612384
SIERRA DENALI 08 Electronic Control Module; (LH front engine compartment)
ESCALADE EXT 08 Electronic Control Module; (LH front under battery)
EXPRESS 3500 VAN 08 Electronic Control Module; (LH rear engine compartment), gasoline
G6 08 Electronic Control Module; (LH front engine compartment), 3.5L
HUMMER H2 08 Electronic Control Module; (LH front under battery)
EXPRESS 1500 VAN 08 Electronic Control Module; (LH rear engine compartment), 5.3L
MALIBU 08 Electronic Control Module; classic style (emblem in grille), 3.5L
SAVANA 1500 VAN 08 Electronic Control Module; (LH rear engine compartment), 5.3L
CORVETTE 08 Electronic Control Module; (RH engine compartment)
CORVETTE 09 Electronic Control Module; (RH engine compartment), Z06
IMPALA 08 Electronic Control Module; (lower part of air cleaner box), 3.9L
SILVERADO 1500 PICKUP 08 Electronic Control Module; (LH front under battery), w/o 4.3L
YUKON 08 Electronic Control Module; (LH front under battery), w/o hybrid option
EXPRESS 2500 VAN 08 Electronic Control Module; (LH rear engine compartment), gasoline
SILVERADO 2500 PICKUP 08 Electronic Control Module; (LH front under battery), 6.0L
YUKON XL 2500 08 Electronic Control Module; (LH front under battery)
SILVERADO 3500 PICKUP 08 Electronic Control Module; (LH front under battery), 6.0L
G6 08 Electronic Control Module; (LH front engine compartment), 3.9L
SAVANA 3500 VAN 08 Electronic Control Module; (LH rear engine compartment), gasoline
SIERRA 1500 PICKUP 08 Electronic Control Module; (LH front under battery), w/o 4.3L
TAHOE 08 Electronic Control Module; (LH front under battery), w/o hybrid option
MALIBU 08 Electronic Control Module; new style (emblem in bumper cover), 3.5L
SAVANA 2500 VAN 08 Electronic Control Module; (LH rear engine compartment), gasoline
ESCALADE ESV 08 Electronic Control Module; (LH front under battery)
ESCALADE 08 Electronic Control Module; (LH front under battery)
IMPALA 08 Electronic Control Module; (lower part of air cleaner box), 3.5L
YUKON XL 1500 08 Electronic Control Module; (LH front under battery)
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the Engine Control Module with the exact software and calibrations for your specific truck. This ensures it communicates correctly with your engine, transmission, and security system, making the installation plug-and-play.
Is this a difficult part to install myself?
For most DIYers with basic tools, this is a straightforward installation. The module is typically easy to access, and since we pre-program it, no special electronic tools are needed. Just follow our installation guide above.
What if the part number on my old module is different?
No problem. This ECM is a direct replacement for several part numbers, including 12612384, 12622141, and 12617568. As long as your vehicle is on our compatibility list, this module will work perfectly once programmed to your VIN.
Will I need to do anything else after installation?
In most cases, no. The module is ready to go. On some GM vehicles, a simple security relearn procedure (often called a ‘key cycle’) may be needed, which takes about 10-15 minutes and does not require any special tools. Instructions are widely available online or in your vehicle’s service manual.