Restore Your Cadillac’s Performance with a VIN-Programmed Engine Control Module
Is your 2006 Cadillac CTS running rough, stalling unexpectedly, or showing a persistent check engine light that no other repair seems to fix? You’re likely dealing with a failing Engine Control Module (ECM), the central computer of your vehicle. A faulty ECM can create a cascade of frustrating and hard-to-diagnose issues, from poor fuel economy and erratic shifting to a complete no-start condition. This isn’t just an inconvenience; it’s a reliability issue that can leave you stranded. This replacement 2006 CTS Engine Module is the definitive solution to restore your vehicle’s factory-spec operation and your peace of mind.
We take the guesswork and high dealership costs out of the equation. Unlike a generic module from a parts store, this unit arrives at your door pre-programmed with the latest official GM software, specifically matched to your vehicle’s unique Vehicle Identification Number (VIN). This critical step ensures seamless communication with your car’s other systems, including the transmission, anti-lock brakes, and security system. Simply provide your VIN at checkout, and we handle the complex programming for you, making the installation process as straightforward as possible.
Case Study: The Ghost in the Grand Prix
I once had a 2008 Grand Prix GXP in my bay that was a real head-scratcher. The customer had already replaced the throttle body and mass airflow sensor trying to fix an intermittent stalling problem and random throttle position codes. On paper, everything looked fine. But during a long test drive, the car would suddenly lose power and throw a U0100 Lost Communication with ECM code. After verifying all the wiring and network connections were solid, we focused on the module itself. These ECMs can develop internal faults, especially in the processor, that don’t always set a hard P0601 or P0606 code right away. We swapped in a VIN-programmed ECM, performed the security relearn, and the car ran perfectly. It’s a classic example of how a failing computer can send you chasing phantom mechanical problems, and why a reliable, correctly programmed module is the only true fix.
Is Your Cadillac Showing These Signs of a Failing ECM?
A failing engine computer can manifest in numerous ways. If you’re experiencing any of the following, a faulty 2006 CTS Engine Module is a very likely culprit:
- ✔ Unexplained Check Engine Light with codes like P0601, P0606, or other U-series communication codes.
- ✔ Engine stalling or shutting off while driving.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Noticeable drop in fuel efficiency.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Poor engine performance, including hesitation or misfires.
- ✔ Cooling fans not turning on or running constantly.
Your Straightforward Installation Guide
Installing your new ECM is a manageable job for a confident DIYer. While we handle the programming, a simple security relearn procedure is often required after installation to sync the new module with your car’s anti-theft system. This procedure does not require special tools.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- Locate the ECM: On the 2006 Cadillac CTS, the engine module is typically located in the engine compartment on the right-hand (passenger) side.
- Disconnect Connectors: Carefully release the locking tabs and unplug the electrical wiring harnesses from the old module. Inspect the connectors for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware as you will reuse it.
- Install the New Module: Mount your new, pre-programmed ECM onto the bracket and securely tighten the bolts.
- Reconnect Everything: Plug the wiring harnesses back into the new module, ensuring they click securely into place. Reconnect the negative battery terminal.
- Perform Security Relearn: Follow your vehicle’s specific security relearn procedure (often a 10-30 minute process involving turning the key to the ‘ON’ position). This allows the vehicle to recognize the new ECM.
Verified Vehicle Compatibility List
This ECM, part number 12603530, is a direct replacement for a wide range of General Motors vehicles. It is interchangeable with service numbers 12590032, 12602044, 12605843, 12607096, 12630457, and 19210737. Please verify your vehicle, year, and engine options below. Matching the ID number from your original module is recommended for a guaranteed fit.
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, 08 Electronic Control Module
ENCLAVE 08 Electronic Control Module; (behind fan shroud), ID 12607096 or 19210737
ENVOY 07-08 Electronic Control Module; 5.3L (LH engine)
ENVOY 08-09 Electronic Control Module; 4.2L (LH engine)
G6 06-07 Electronic Control Module; (LH front engine compartment), ID 12603530
G6 07-09 Electronic Control Module; (LH front engine compartment), 3.6L
GRAND PRIX 08 Electronic Control Module; (lower air cleaner box), 5.3L
HHR 06 Electronic Control Module; (LH rear engine compartment), 2.4L
HUMMER H3 08 Electronic Control Module; (RH firewall)
IMPALA 06 Electronic Control Module; (lower part of air cleaner box), 3.5L or 3.9L
IMPALA 08-09 Electronic Control Module; (lower part of air cleaner box), 5.3L
ION 06 Electronic Control Module; 2.4L (opt LE5)
ISUZU ASCENDER 08 Electronic Control Module; (4.2L, LH engine)
ISUZU I-290 08 Electronic Control Module; (RH firewall)
ISUZU I-370 08 Electronic Control Module; (RH firewall)
LACROSSE 08-09 Electronic Control Module; (lower air cleaner housing), 5.3L
LUCERNE 06, 08 Electronic Control Module; (lower part of air cleaner box), 4.6L
MALIBU 06 Electronic Control Module; 3.9L
MALIBU 08-10 Electronic Control Module; new style, 2.4L or 3.6L
MONTE CARLO 06 Electronic Control Module; (lower part of air cleaner box), 3.5L or 3.9L
MONTANA 06, 08-09 Electronic Control Module; (LH engine compartment)
OUTLOOK 08 Electronic Control Module; (behind fan shroud)
PURSUIT 06 Electronic Control Module; (LH front engine compartment), 2.4L
RAINIER 07 Electronic Control Module; (LH engine), 5.3L
RELAY 06 Electronic Control Module; (LH engine compartment), 3.9L
SAAB 9-7X 07 Electronic Control Module; (LH engine), 8 cylinder
SAAB 9-7X 08 Electronic Control Module; (LH engine), 5.3L or 6.0L
SOLSTICE 06 Electronic Control Module; (LH front frame rail)
SRX 08 Electronic Control Module; (LH engine compartment), (4.6L)
STS 06 Electronic Control Module; (LH frame rail), 4.4L
STS 08 Electronic Control Module; (LH frame rail), 4.4L or 4.6L
TERRAZA 06 Electronic Control Module; (LH engine compartment), 3.9L
TRAILBLAZER 07 Electronic Control Module; (LH engine), 5.3L or 6.0L
TRAILBLAZER 08-09 Electronic Control Module; (LH engine), 4.2L, 5.3L or 6.0L
UPLANDER 06, 08-09 Electronic Control Module; (LH engine compartment), (3.9L)
VUE 08-10 Electronic Control Module; 2.4L or 3.6L
XLR 06, 08-09 Electronic Control Module; (RH front engine compartment)
Why do you need my VIN?
Why do you need my VIN?
Your VIN is essential for us to program the Engine Control Module with the exact software calibration for your specific vehicle. This ensures correct engine operation, transmission strategy, emissions compliance, and compatibility with your car’s anti-theft system. It’s the key to a true plug-and-play repair.
Is this a difficult part to install myself?
For most DIYers with basic tools, this is a straightforward installation. The main steps are disconnecting the battery, unplugging the old module, unbolting it, and reversing the process. Since we do the programming, the only post-installation step is a simple security relearn procedure that you can do at home without any special equipment.
Will this fix my check engine light?
If your check engine light is caused by an internal ECM failure (common codes P0601-P0606) or related communication faults, then yes, this new 2006 CTS Engine Module is the correct fix. However, it’s always best to have the codes professionally diagnosed to ensure the fault isn’t with a sensor or wiring.
What if I order the wrong part?
We strongly encourage you to verify your part number and check the compatibility list before ordering. Providing your VIN helps us double-check the fitment. If you’re unsure, please contact us with your vehicle’s information, and our expert team will help you confirm the correct module for your car.