Is Your 2007 Cadillac XLR Running Rough or Not Starting?
The Powertrain Control Module (PCM), often called the Engine Control Module (ECM), is the central computer of your vehicle. It manages everything from fuel injection and ignition timing to transmission shifting and emissions control. When the PCM in your 2007 Cadillac XLR begins to fail, it can cause a cascade of confusing and frustrating problems, often leaving you stranded. Symptoms can range from a simple check engine light to a complete no-start condition. This genuine, used OEM Powertrain Control Module, part number 19210736 (interchangeable with 12605843), is the definitive solution to restore your vehicle’s performance and reliability.
Expert Pro Tip
Before replacing your PCM, always perform a thorough check of the vehicle’s battery, charging system, and all main power and ground connections to the module. A corroded ground wire or a weak battery can mimic PCM failure symptoms. Use a multimeter to verify you have a stable 12V+ supply and a clean ground path at the PCM connector. This simple diagnostic step can save you hundreds of dollars and ensure you’re replacing the correct part.
Common Symptoms of a Failing PCM
If you’re experiencing any of the following issues, a faulty PCM could be the culprit. A failing module can disrupt communication between critical systems, leading to unpredictable behavior and poor performance.
- ✔ Persistent Check Engine Light (CEL) with various trouble codes, especially those related to internal module memory or processor faults (e.g., P0601, P0606).
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Complete no-start condition where the engine cranks but won’t fire up.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Intermittent loss of power to injectors or spark plugs.
- ✔ Communication issues with diagnostic scan tools.
- ✔ Cooling fans running constantly or not turning on at all.
The Direct-Fit Solution: A Programmed 2007 Cadillac XLR PCM
Navigating an engine computer replacement can be daunting. Dealerships often charge exorbitant fees for the part and the mandatory programming. We eliminate that hassle. This part is a reliable, tested unit sourced from a salvaged vehicle. The key benefit is our professional programming service. When you purchase this module, we flash it with the latest GM-certified software updates specifically for your vehicle using the VIN you provide. This ensures that when the part arrives, it is a true plug-and-play solution, ready for installation without requiring a trip to the dealer for expensive calibration.
This process guarantees that all vehicle-specific parameters, such as engine displacement, transmission type, and emissions settings, are perfectly matched to your 2007 Cadillac XLR. By using a genuine OEM part, you maintain the original factory performance and electronic integrity, avoiding the compatibility issues that can arise with aftermarket units.
Guaranteed Fitment for a Wide Range of GM Vehicles
While this is the correct 2007 Cadillac XLR PCM, part number 19210736 is also compatible with a vast array of other 2007 General Motors vehicles. Please verify your specific model and engine option below:
- Acadia: (behind fan shroud), ID 19210736 (PCM)
- Aura: (RH firewall), 2.4L & 3.6L
- Cobalt: (LH front engine compartment), 2.4L (VIN B)
- CTS: (RH engine compartment), V-Series
- DTS: Electronic Control Module
- G5: (LH front engine compartment), 2.4L (VIN B)
- G6: (LH front engine compartment), 2.4L & 3.6L (ID 19210736)
- Grand Prix: (lower air cleaner box), 5.3L
- HHR: (LH rear engine compartment), 2.4L
- Impala: (lower part of air cleaner box), 5.3L
- Ion: 2.2L (opt L61) & 2.4L (opt LE5)
- Lucerne: (lower part of air cleaner box), 4.6L
- Montana: (LH engine compartment)
- Monte Carlo: (lower part of air cleaner box), 5.3L
- Outlook: (behind fan shroud)
- Relay: (LH engine compartment)
- Sky: (LH front frame rail), 2.4L
- Solstice: (LH front frame rail), 2.4L
- SRX: (LH engine compartment), 4.6L
- STS: (LH frame rail), 4.4L & 4.6L
- Terraza: (LH engine compartment), 3.9L
- Uplander: (LH engine compartment), 3.9L
- Vue: 2.4L
- XLR: (RH front engine compartment)
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM) is your car’s main computer. It controls the engine’s fuel delivery, spark timing, emissions systems, and the transmission’s shifting patterns to ensure optimal performance, fuel efficiency, and low emissions.
Do I need to program this module?
No. We handle the programming for you before we ship the part. Simply provide your vehicle’s 17-digit VIN during or after checkout, and we will flash the module with the correct, updated software for your specific car. This makes installation much simpler.
Is this a new part?
This is a used, genuine OEM part that has been carefully removed from a salvaged vehicle. Each unit is inspected and tested to ensure it is fully functional before being programmed and shipped.
Where is the PCM located on my 2007 Cadillac XLR?
On the 2007 Cadillac XLR, the Powertrain Control Module is located in the engine compartment on the right-hand (passenger) side, near the front of the vehicle.
Will I need to perform any other procedures after installation?
In many cases, you may need to perform a security relearn procedure (also known as a Passlock or anti-theft relearn) to sync the new PCM with your vehicle’s anti-theft system. This procedure can typically be done without special tools and instructions can be found online or in a service manual.
How do I provide my VIN?
After you complete your purchase, you can send us a message with your vehicle’s 17-digit VIN. We cannot ship your order until we receive the VIN, as programming is a required step.