Restore Peak Performance to Your Cadillac DTS
Is your 2006 Cadillac DTS experiencing frustrating issues like stalling, erratic shifting, a persistent check engine light, or even a complete no-start condition? As a technician with over two decades of experience, I’ve seen these symptoms countless times, and they often point directly to a failing Engine Control Module (ECM). The ECM is the brain of your vehicle, managing everything from fuel mixture and ignition timing to transmission shifts. When it falters, the entire vehicle’s performance and reliability suffer.
This isn’t just a replacement part; it’s a complete solution. We take the guesswork and extra cost out of the repair by programming this module specifically for your vehicle using your VIN. This ensures it has the latest GM software updates and communicates flawlessly with all other systems in your DTS, just like the original unit did. You get a reliable fix that restores the smooth, powerful driving experience you expect from a Cadillac.
A Technician’s Notebook: The Phantom Misfire
I once had a 2006 Cadillac Deville (which uses this exact ECM family) come into the bay with a random misfire that no one could solve. The owner had already replaced plugs, coils, and even injectors. The scan tool showed misfire counts, but no specific cylinder was the consistent culprit. After checking all the wiring, I suspected the ECM. The internal drivers that fire the ignition coils can weaken over time, causing intermittent issues that are a nightmare to diagnose. We installed a VIN-programmed ECM, and the car ran perfectly. It’s a classic case where the central computer was the root cause, not the components it controls.
Is Your Cadillac Showing These Symptoms?
A failing ECM can manifest in various ways. If you’re noticing any of the following, it’s a strong indicator that your vehicle’s computer needs attention.
- ✔ Unexplained Check Engine Light (CEL)
- ✔ Engine stalling or shutting off while driving
- ✔ Difficulty or failure to start the engine
- ✔ Poor fuel economy
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Communication error codes, such as U0100 (Lost Communication with ECM/PCM)
- ✔ Internal module failure codes, like P0601 or P0606
- ✔ Apparent loss of engine power
A Straightforward Guide to Installation
Installing your new 2006 DTS Engine Control Module is a manageable job for a confident DIYer. Follow these steps for a smooth installation process.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes to allow all systems to power down completely.
- Locate the ECM: On the 2006 Cadillac DTS, the Engine Control Module is typically located in the engine compartment. Consult a vehicle-specific repair manual if you have trouble finding it.
- Disconnect Connectors: Carefully unlatch and remove the electrical wiring harness connectors from the old module. Inspect them for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware, as you will need it to install the new unit.
- Install the New Module: Mount your new, pre-programmed ECM onto the bracket and secure it with the original hardware.
- Reconnect Everything: Firmly plug the wiring harness connectors into the new module until they click into place. Reconnect the negative battery terminal.
- Final Steps: Depending on your vehicle, a security or anti-theft relearn procedure may be necessary. This can often be done without special tools by cycling the key. Consult your owner’s manual for the specific procedure for your DTS.
Guaranteed Vehicle Compatibility
This module, part number 12590032, is a direct replacement for a wide range of General Motors vehicles. It is interchangeable with service numbers 12602044, 12603530, 12605843, 12607096, 12630457, and 19210737. While it fits the models listed below, always verify your original part number before ordering.
- ✔ Cadillac: DTS (2006, 2008), Deville (2005), STS (2006, 2008), XLR (2006, 2008-2009), CTS (2006), SRX (2008)
- ✔ Chevrolet: Colorado (2008), Monte Carlo (2006), Impala (2006, 2008-2009), Malibu (2006, 2008-2010), HHR (2006), Cobalt (2006), Trailblazer (2007-2009), Uplander (2006, 2008-2009), Canyon (2008)
- ✔ Buick: Allure (2008-2009), LaCrosse (2008-2009), Lucerne (2006, 2008), Rainier (2007), Enclave (2008)
- ✔ GMC: Envoy (2007-2009), Acadia (2007-2008)
- ✔ Pontiac: G6 (2006-2009), Grand Prix (2008), Solstice (2006), Pursuit (2006)
- ✔ Saturn: Aura (2008-2009), Ion (2006), Relay (2006), Vue (2008-2010), Outlook (2008)
- ✔ Isuzu: Ascender (2008), i-290 (2008), i-370 (2008)
- ✔ Saab: 9-7x (2007-2008)
- ✔ Hummer: H3 (2008)
Frequently Asked Questions
Do I need to program this module?
No. We handle the programming for you before shipment. Simply provide your vehicle’s 17-digit VIN during or after checkout, and it will arrive ready for installation.
What if I forget to provide my VIN?
We cannot ship the module until we have your VIN to ensure correct programming. We will contact you via email or phone to get the necessary information if it’s not provided with the order.
Will this fix my specific problem?
This module is a direct replacement for a faulty ECM. If your vehicle has been properly diagnosed with a failed ECM, this part will resolve the related issues. It will not fix problems caused by other faulty components (e.g., bad sensors or wiring).
Is an anti-theft or security relearn required after installation?
Yes, most GM vehicles of this era require a security relearn procedure after the ECM is replaced. This typically involves a simple key-cycling process that takes about 30 minutes and does not require special scan tools. Instructions are widely available online or in your vehicle’s service manual.
Are any other part numbers compatible?
Yes, this ECM is a direct replacement for several service numbers, including 12602044, 12603530, 12605843, 12607096, 12630457, and 19210737.