Description
(May fit other vehicles) Compatibility: 2003-2006 Cadillac CTS
OEM Part Number: 12605330
Looking for a VIN-Programmed Replacement 12605330 ECU?
Want to save on costly dealer programming and locksmith services?
We’re here to help!
This key-ready, ECU comes with our VIN programming service and the latest OEM software updates to ensure a seamless replacement process.
Provide your VIN in the note box during checkout to take advantage of our programming service.
Details:
Delivery Timeline: 5-7 business days.
Availability: Since these ECUs are discontinued, stock is limited.
Warranty: Backed by a worry-free 2-year warranty.
Double-check your part number before ordering! If you don’t see your specific number, reach out to us—we may have a compatible unit available.
Programming Details:
For compatibility, your VIN must be programmed to sync with your vehicle’s other systems.
We also ensure each unit has the latest OEM, VIN matched software from GM. This may be beneficial if your original unit software is out of date causing rough shifting, idle issues, or stalling.
The mileage and engine hours will not be affected after installing the replacement unit.
After Installation Notes:Â
The keys may need to be programmed or the vehicle will not start. Our step-by-step instructions make this an easy process that requires no additional tools.
In addition to key programming a crank shaft position sensor relearn may also be required. After a replacement ECU is installed in these vehicles it’s common for a service engine light (code P1336) to be present. The vehicle will operate as normal without issues but to clear the code, a repair shop that has the capability of doing a “crankshaft position relearn procedure” may be required.
Frequently Used Terms:
Engine Computer: ECU (Engine Control Unit), ECM (Engine Control Module), BCM (Body Control Module), PCM (Power Control Module).
OEM: Original Equipment Manufacturer – we provide authentic factory units.
2005 Cadillac CTS ECM Replacement – VIN Programmed
This OEM 12605330 engine control module fits 2003–2006 Cadillac CTS models, including the 2005 CTS. It may also fit other GM vehicles that use the same part number.
GM engine control modules (ECMs) must be programmed to your VIN to work with the rest of the car. We do that before we ship it.
How your CTS ECM replacement works
- Order this ECM and enter your 17-digit VIN in the order notes at checkout.
- We program the ECM to your VIN and load the latest OEM GM software when applicable.
- It ships to you within about 5 to 7 business days.
- Install it, then follow our included key relearn steps. No special tools are needed for the key relearn.
Frequently Asked Questions
Do I need to send my old ECM?
No. We program this unit using the VIN you give us at checkout.
Will my mileage change?
No. Mileage and engine hours are not affected by replacing the ECM.
Why is a check engine light on after install?
Some GM trucks set code P1336 until a crankshaft position relearn is done. The vehicle runs normally. Any shop with a capable scan tool can do the relearn.
Is there a warranty?
Yes. Our programmed, pre-owned units include a 2-year warranty.
We understand for some, a vehicle is part of the family. Our mission is to get your vehicle back on the road by offering quick and cost-effective solutions.
If you have any questions about this unit or anything else, please do not hesitate to reach out to us!
