Is your Cadillac XLR running rough, stalling unexpectedly, or showing a persistent Check Engine Light? These are classic signs of a failing Engine Control Module (ECM), the computer that serves as your vehicle’s brain. When it falters, everything from fuel economy to engine timing can suffer. This isn’t just an annoyance; it’s a critical failure that compromises your car’s performance and reliability. Don’t let a faulty computer keep your luxury roadster parked in the garage. We offer a dependable, direct-fit solution.
This ECM, part number 19210737, is the definitive fix for these issues. What sets our service apart is that we handle the most complex part of the job for you. Before this module ever leaves our facility, we program it with the latest official GM software updates, specifically matched to your vehicle’s unique VIN. This means no expensive trips to the dealership for programming, no special tools required—just a straightforward replacement that restores your vehicle’s factory performance.
A Technician’s Notebook: The Intermittent XLR Gremlin
I remember a 2006 Cadillac XLR that came into my shop with a truly frustrating problem. The owner reported that it would randomly refuse to start, but only after it was warm. No check engine light, no consistent codes—just an intermittent no-crank, no-start condition. We checked the battery, starter, and security system, all of which tested fine. After hours of diagnostics, we finally caught a communication drop from the ECM on our scan tool during a hot-soak test. The internal processor was failing under heat. We sourced a replacement 2006 XLR Engine Control Module, had it programmed to the VIN, and installed it. The problem vanished instantly. It’s a perfect example of how ECM failure can manifest in bizarre ways, and why a pre-programmed, reliable part is the fastest path to a confident repair.
Is Your Cadillac Showing These Signs of ECM Failure?
A failing engine computer can cause a wide range of symptoms. If you’re experiencing any of the following, a faulty ECM is a likely culprit:
- ✔ Persistent Check Engine Light (CEL)
- ✔ Engine stalling, stumbling, or misfiring
- ✔ Drastic decrease in fuel efficiency
- ✔ No-start or hard-starting conditions
- ✔ Failure to communicate with a scan tool
- ✔ Specific diagnostic trouble codes (DTCs) like P0601, P0606, or U0100
- ✔ Erratic transmission shifting or performance issues
A Straightforward Guide to Installation
Installing your pre-programmed 2006 XLR Engine Control Module is a job most DIYers can handle with basic tools. Our VIN-matching service eliminates the need for any post-installation computer work.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the Old ECM: On the 2006 Cadillac XLR, the Engine Control Module is typically located in the engine compartment on the right-hand (passenger) side, near the front.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Once disconnected, unbolt the module from its mounting bracket and remove it from the vehicle.
- Install the New Module: Mount the new ECM onto the bracket and securely tighten the bolts. Re-connect the wiring harnesses, ensuring they click into place.
- Final Steps: Reconnect the negative battery terminal. The vehicle may need to complete an idle relearn procedure, which usually involves starting the engine and letting it idle for several minutes. Test drive the vehicle to confirm the issue is resolved.
Verified Vehicle Compatibility
This ECM is a direct replacement for service number 19210737 and is interchangeable with part numbers 12590032, 12602044, 12603530, 12605843, 12607096, and 12630457. It fits a wide variety of GM vehicles, including but not limited to:
- ✔ Cadillac XLR: 2006 (4.4L), 2008, 2009
- ✔ Cadillac CTS: 2006 (V-Series)
- ✔ Cadillac DTS: 2006, 2008
- ✔ Chevrolet Impala / Monte Carlo: 2006-2009
- ✔ Chevrolet Trailblazer / GMC Envoy: 2007-2009
- ✔ Chevrolet Colorado / GMC Canyon: 2008
- ✔ Pontiac G6: 2006-2009
- ✔ Buick LaCrosse / Allure: 2008-2009
- ✔ And many more models from Saturn, Hummer, Isuzu, and Saab. Please verify your part number.
Frequently Asked Questions
Frequently Asked Questions
Do I need to program this module?
No. We program the module to your vehicle’s VIN before shipping. It arrives ready for installation, with no extra programming required.
What is a VIN and where do I find it?
The VIN is your 17-digit Vehicle Identification Number. You can find it on your vehicle’s registration, insurance card, or on the driver’s side of the dashboard, visible through the windshield.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your VIN. We cannot ship your part until we receive this information for programming.
Will this fix my check engine light?
If the check engine light is caused by a faulty ECM (e.g., codes P0601-P0606), this part is the correct fix. It is essential to properly diagnose the vehicle first, as other failing sensors can also trigger a check engine light.
Is this a difficult part to install myself?
For most vehicles, including the Cadillac XLR, this is a straightforward DIY job that requires only basic hand tools. The most important part is ensuring the battery is disconnected before you begin.