Restore Peak Performance to Your GM Vehicle
If your car is suffering from baffling issues like stalling, poor fuel mileage, a persistent check engine light, or a complete no-start condition, the Engine Control Module (ECM) is often the culprit. As a technician with over two decades of experience, I’ve seen how a failing ECM can mimic a dozen other problems, leading to wasted time and money on incorrect repairs. This isn’t just a replacement part; it’s a direct solution to restore your vehicle’s operational core. This module arrives at your door pre-programmed with the latest GM factory software, specifically matched to your vehicle’s VIN. This critical step ensures all systems communicate correctly, eliminating the need for an expensive trip to the dealership for programming.
A Technician’s Notebook: The Ghost in the Machine
I remember a 2008 Chevy Impala that came into the shop with a list of complaints that made no sense together. The owner reported random stalling at lights, occasional hard shifts, and a check engine light that would come and go. We checked everything—fuel pressure was good, sensors tested fine on the scope, and the transmission fluid was clean. The only consistent clue was a U0100 (Lost Communication with ECM) code that would pop up intermittently. After hours of chasing wires, we swapped in a known-good ECM. The car ran perfectly. The original module had an internal hairline fracture on the circuit board that would separate when it got hot, causing these ‘ghost’ issues. This pre-programmed 2006 Pursuit Engine Control Module is the exact fix for these kinds of frustrating, hard-to-diagnose electronic failures.
Is Your Vehicle Showing These Symptoms?
- ✔ Check Engine Light is illuminated with communication or internal processor codes (e.g., P0601, P0606, U0100).
- ✔ The engine cranks but refuses to start.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Unexplained engine stalling or stuttering.
- ✔ Rough or inconsistent automatic transmission shifting.
- ✔ Failure to pass an emissions inspection due to communication errors.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental contact.
- ✔ Locate the ECM: On the 2006 Pursuit, the ECM is typically found in the left-hand (driver’s side) front of the engine compartment. Its location can vary on other compatible models, often near the firewall or air cleaner housing.
- ✔ Disconnect Connectors: Carefully release the locking tabs and unplug the 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 need it for the new unit.
- ✔ Install the New ECM: Mount your new, pre-programmed module in place using the original hardware. Reconnect the wiring harnesses, ensuring they click securely into place.
- ✔ Reconnect Battery: Reattach the negative battery terminal. The vehicle may require a security relearn procedure, which typically involves turning the key to the ‘On’ position for 10-15 minutes. Consult your owner’s manual for specific steps.
Verified Vehicle Compatibility
This ECM, part number 12630457, is a direct replacement for a wide range of GM, Isuzu, and Saab vehicles. It is interchangeable with service numbers 12590032, 12602044, 12603530, 12605843, 12607096, and 19210737. Please confirm your vehicle is on the list below. Providing your VIN at checkout is required to ensure we send you a perfectly matched and programmed unit.
Frequently Asked Questions
Frequently Asked Questions
Do I need to do any programming after I receive this ECM?
No. We program the module to your specific VIN before shipping. In most cases, it is a plug-and-play installation, though some vehicles may require a simple security or crankshaft position sensor relearn procedure that can be done without special tools.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship your order until we receive this information.
Is this compatible with other part numbers?
Yes, this ECM is a direct replacement for several service numbers, including 12590032, 12602044, 12603530, 12605843, 12607096, and 19210737. Matching one of these numbers or the vehicle in our fitment list guarantees compatibility.
What if my original problem doesn’t go away?
While this part fixes the most common electronic failure points, proper diagnosis is key. Ensure you have ruled out other potential issues like faulty wiring, sensors, or fuel delivery problems. A failing ECM can often cause misleading symptoms.
Will this fix my car’s anti-theft system issues?
A failing ECM can certainly cause security system problems. Because this module is programmed to your VIN, it is designed to communicate correctly with your vehicle’s Body Control Module (BCM) and anti-theft system, often resolving these conflicts after a relearn procedure.