Is Your GM Vehicle Running Rough, Stalling, or Showing a Check Engine Light?
As a mechanic with over two decades of experience, I’ve seen it all. A car comes into the shop with a list of frustrating, intermittent problems: it won’t start on cold mornings, it hesitates during acceleration, the check engine light is a permanent fixture on the dash, and fuel economy has plummeted. The owner has often replaced sensors and other parts, but the root cause remains. More often than not, the culprit is a failing Engine Control Module (ECM)โthe computer that acts as the brain of your engine.
This isn’t just an inconvenience; it’s a critical failure that compromises performance, reliability, and safety. For vehicles like the 2009 Cadillac XLR, Corvette, or a workhorse like the Chevy Colorado, a faulty ECM means you’re not getting the power and efficiency you paid for. This replacement Engine Control Module is the definitive solution, arriving at your door specifically programmed for your vehicle’s VIN.
Why Choose Our 2009 XLR Engine Module?
Getting your vehicle back to peak condition shouldn’t be a complicated or expensive ordeal. We’ve streamlined the process to eliminate the biggest hassle: the dealership. When you order from us, you get a reliable component that’s ready for installation right out of the box.
- โ VIN-Programmed for Your Vehicle: We flash this module with the latest GM software updates using the VIN you provide. This ensures perfect communication with your vehicle’s systems.
- โ No Dealer Visit Required: Save hundreds of dollars and the time spent on scheduling and waiting for a dealership to program a new computer.
- โ Restores Original Performance: A correctly functioning ECM is key to resolving issues like poor idle, hesitation, incorrect fuel mixture, and transmission shifting problems.
- โ Direct-Fit Replacement: Guaranteed to be compatible with a wide range of GM vehicles and part numbers, making your search simple and certain.
Expert Pro Tip from a 20-Year Veteran Mechanic
Before you install your new ECM, take a moment to inspect the wiring harness connectors. Over the years, I’ve seen countless modules get damaged immediately upon installation because of hidden corrosion or a bent pin inside the connector. Use a small flashlight and look for any green or white crusty buildup. If you see any, clean it out carefully with a small pick and some electrical contact cleaner. A clean, secure connection is absolutely vital for the longevity and proper function of your new module.
Plug-and-Play Installation: Get Back on the Road Fast
You don’t need to be a master technician to complete this job. With basic hand tools, you can have your vehicle running smoothly again. The location varies by model, but the process is straightforward.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to ensure all systems are powered down.
- Locate the ECM: On a 2009 XLR, it’s typically in the right-hand front of the engine compartment. For other models, refer to the fitment list below for its location (e.g., RH firewall, LH engine).
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new ECM into place. Reconnect the wiring harnesses, ensuring they click securely into place. Double-check that the locking tabs are engaged.
- Reconnect Battery: Reattach the negative battery terminal. Your vehicle may need to complete a drive cycle for all systems to fully sync, but the core programming is already done.
Guaranteed Fitment for Your Vehicle
This module is a direct replacement for several service numbers. Please verify your part number or vehicle in the list below. Upon purchase, simply provide your VIN, and we’ll handle the programming.
Replaces Part Numbers: 12636659, 12639300, 1263605, 12628993, 12628911, 12625453, 12622175, 12630464, 12678512
This ECM is compatible with the following vehicles:
- Cadillac CTS: 2009 (6.2L) – RH front engine compartment
- Cadillac DTS: 2009-2011 – Electronic Control Module
- Cadillac SRX: 2009 (4.6L) – LH engine compartment
- Cadillac STS: 2009 (4.4L, 4.6L), 2010 (4.6L) – LH frame rail
- Cadillac XLR: 2009 – RH front engine compartment (ID 12636659 or 12625453)
- Chevrolet Colorado: 2009, 2010-2012 (2.9L, 3.7L) – RH firewall
- Chevrolet Corvette: 2009 (ZR1) – RH engine compartment
- Chevrolet Trailblazer: 2009 (6.0L) – LH engine
- GMC Canyon: 2009, 2010-2012 (2.9L, 3.7L) – RH firewall
- GMC Envoy: 2009 (5.3L) – LH engine
- Hummer H3: 2009, 2010 (3.7L) – RH firewall
- Buick Lucerne: 2009-2011 (4.6L) – Lower part of air cleaner box
- Saab 9-7X: 2009 – LH engine