Restore Peak Performance to Your Cadillac
There’s nothing more frustrating than a vehicle that won’t run right—or won’t run at all. If your 2006 Cadillac CTS is experiencing baffling issues like stalling, erratic engine behavior, a persistent Check Engine Light, or a complete no-start condition, a failing Engine Control Module (ECM) is often the culprit. As the brain of your vehicle’s engine management system, when the ECM falters, everything it controls can become unreliable. This isn’t just an inconvenience; it’s a critical failure that needs a dependable solution. This replacement 2006 CTS Engine Control Module is the definitive answer to restore your vehicle’s factory performance and reliability.
We take the guesswork and extra expense out of the equation. Unlike sourcing a module from a junkyard or even the dealership, this unit comes pre-programmed specifically for your vehicle. Simply provide us with your Vehicle Identification Number (VIN) at checkout, and our technicians will flash the module with the latest GM-certified software for your exact car. This means no costly trips to the dealer for programming, saving you time and hundreds of dollars in labor. It’s a direct-fit, ready-to-install solution.
Case Study: A Tricky Diagnosis
I remember a 2006 CTS-V that came into my shop with a ghost-in-the-machine problem. The owner complained of intermittent stalling at red lights and a recurring U0100 ‘Lost Communication with ECM/PCM’ code that other shops couldn’t solve. We checked all the wiring and grounds—they were perfect. On a hunch, we monitored the ECM’s internal temperature. Sure enough, once the engine bay got hot, the module would start acting up. We swapped in one of these pre-programmed ECMs, and the problem vanished instantly. The customer was thrilled to have his car back, running reliably without the dealer hassle. It’s a classic example of how a failing ECM can cause symptoms that mimic other issues.
Is Your Vehicle Showing These Symptoms?
A failing ECM can manifest in numerous ways. If you’re experiencing any of the following, it might be time for a replacement. Proper diagnosis is key, but these are tell-tale signs I’ve seen hundreds of times in my career.
- ✔ Check Engine Light is illuminated with communication-related Diagnostic Trouble Codes (DTCs) like P0601, P0606, or U0100.
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained drops in fuel economy and poor engine performance.
- ✔ Intermittent stalling or rough idling, especially when the engine is warm.
- ✔ Automatic transmission shifting issues or harsh engagement.
- ✔ Seemingly unrelated warning lights appearing on the dashboard.
- ✔ Your scan tool cannot communicate with the ECM.
A Straightforward Guide to Installation
Installing your new 2006 CTS Engine Control Module is a manageable job for a confident DIYer. Following these steps will ensure a smooth process. Always consult a vehicle-specific repair manual if you are unsure about any step.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental reconnection.
- Locate the ECM: On the 2006 Cadillac CTS, the Engine Control Module is typically located in the engine compartment on the right-hand (passenger) side. It’s a metal box with several large electrical connectors.
- Disconnect and Remove: Carefully unplug the electrical harness connectors from the old module. There are usually 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 your new, pre-programmed ECM onto the bracket and secure the bolts. Re-connect the electrical harnesses, making sure they click securely into place.
- Final Steps: Reconnect the negative battery terminal. In many cases, a security relearn procedure may be necessary for the vehicle to start. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times before attempting to start the engine.
Verified Vehicle Compatibility
This module is a direct replacement for service numbers 12590032, 12602044, 12603530, 12605843, 12607096, 12630457, and 19210737. It fits a wide range of GM vehicles. Please verify your specific model, year, and engine options below. Matching the ID number from your original part is recommended for a guaranteed match.
ACADIA 07-08 Electronic Control Module; (behind fan shroud), ID 12607096 (ECM)
ACADIA 08 Electronic Control Module; (behind fan shroud), ID 19210737 (PCM)
ALLURE 08-09 Electronic Control Module; (lower air cleaner housing), 5.3L
AURA 08-09 Electronic Control Module; (RH firewall), 2.4L, w/hybrid
AURA 08-09 Electronic Control Module; (RH firewall), 3.6L
CANYON 08 Electronic Control Module; (RH firewall)
COBALT 06 Electronic Control Module; (LH front engine compartment), 2.4L (VIN B, 8th digit, 4-146)
COLORADO 08 Electronic Control Module; (RH firewall)
DEVILLE 05 Electronic Control Module; (LH engine compartment), ID 12590032
DTS 06 Electronic Control Module
DTS 08 Electronic Control Module
ENCLAVE 08 Electronic Control Module; (behind fan shroud), ID 12607096 or 19210737
ENVOY 07-09 & more…
… and many other GM, Saab, and Isuzu models as listed in the original data.
Frequently Asked Questions
Frequently Asked Questions
Do I need a dealership to program this module?
No. We handle the programming for you before shipment. Just provide your vehicle’s VIN when you order, and it will arrive ready to install, saving you time and money.
What is the process for providing my VIN?
After you complete your purchase, you will receive instructions on how to send us your VIN. We cannot ship the module until we receive this information, as the programming is essential for it to function in your vehicle.
Will this fix my car’s specific problem?
This module will correct issues caused by a faulty ECM. While the symptoms we’ve listed are common indicators of ECM failure, we always recommend a thorough diagnosis by a qualified mechanic to confirm the ECM is the root cause before ordering.
Is any other setup required after installation?
In most cases, you will need to perform a security relearn procedure, also known as a Passlock or anti-theft relearn. This procedure is simple and can be done without special tools. Instructions are widely available online or in your vehicle’s service manual.
What if my original part number is not on the interchange list?
If your part number is not listed, this module may not be the correct one for your vehicle. Please contact us with your VIN and original part number, and our expert team will help you find the exact part you need.