Restore Your Vehicle’s Brain and Get Back on the Road
As a technician with over two decades of experience under the hood, I’ve seen firsthand how a failing Engine Control Module (ECM) can turn a reliable car into a source of constant frustration. If your 2006 Pontiac Pursuit is experiencing baffling issues like stalling, erratic idling, poor fuel economy, or a persistent Check Engine Light, the problem often lies with the very component that manages it all. This isn’t just a part; it’s the central computer of your engine, and when it falters, everything else follows suit.
This replacement Engine Control Module is the definitive solution to those problems. We take the guesswork and dealership hassle out of the equation. Before this module ever ships, we program it with the latest GM software updates, specifically matched to your vehicle’s VIN. This ensures that when it arrives, it’s ready to integrate seamlessly with your car’s systems, restoring the precise fuel delivery, ignition timing, and emissions control that the factory intended. You’re not just buying a part; you’re getting a reliable, plug-and-play fix.
Case Study: A Tricky Diagnosis
I remember a 2006 Pontiac G6—which shares a similar Epsilon platform and electronics with the Pursuit—that came into my shop with an intermittent no-start condition that drove the owner crazy. No codes were stored, and every time we had it, it would start fine. We checked the fuel pump, crank sensor, and wiring harnesses. After two days of diagnostics, we finally caught the ECM failing during a hot soak. A hairline crack in an internal circuit board would expand when warm, breaking the connection. Replacing the ECM with a VIN-programmed unit like this one solved the problem for good. It’s a classic example of how these modules can fail in ways that are tough to pinpoint without experience.
Is Your Vehicle Showing These Telltale ECM Failure Symptoms?
A failing ECM can manifest in numerous ways. If you’re noticing any of the following, it’s a strong indicator that your engine’s computer needs attention. Often, you’ll see diagnostic trouble codes (DTCs) like P0601, P0606, or various U-codes pointing to communication loss.
- ✔ Check Engine Light is on or flashes intermittently.
- ✔ Engine stalls, stumbles, or misfires for no apparent reason.
- ✔ Noticeable decrease in fuel mileage.
- ✔ Difficulty starting the engine, or a complete no-start condition.
- ✔ Automatic transmission shifts harshly or at the wrong times.
- ✔ Loss of communication with the diagnostic scan tool.
- ✔ Failure to pass an emissions test.
A Straightforward Guide to Your ECM Installation
Installing your new ECM is a manageable job for a DIY enthusiast with basic tools. The key is our VIN programming service, which eliminates the need for an expensive trip to the dealership for software flashing. Follow these steps for a successful installation.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes for the system capacitors to discharge.
- Locate the Old ECM: On your 2006 Pursuit, the ECM is typically found in the left-hand (driver’s side) front of the engine compartment. It’s a metal box with several large electrical connectors.
- Disconnect the Connectors: Carefully release the locking tabs on the wiring harness connectors and pull them straight out from the module. Never force them; they often have levers or clips that need to be disengaged first.
- Remove the Module: Unbolt the old ECM from its mounting bracket. Keep the mounting hardware, as you will need it for the new module.
- Install the New Module: Mount your new, pre-programmed ECM onto the bracket using the original hardware. Ensure it is secure.
- Reconnect Everything: Plug the wiring harness connectors firmly into the new module until they click and the locking tabs are fully engaged. Reconnect your vehicle’s negative battery terminal.
- Final Steps: In some cases, a security or crank relearn procedure may be required, which can often be done without a scan tool. Check your vehicle’s service information for specific procedures. Start the engine and let it idle for a few minutes to allow the system to stabilize.
Will This Fit My Vehicle?
This Engine Control Module is a direct replacement for service number 12603530 and is interchangeable with part numbers 12590032, 12602044, 12605843, 12607096, 12630457, and 19210737. It fits a wide range of GM vehicles. Please verify your model and specific options below to ensure compatibility.
PURSUIT 06 (2.4L), G6 06-09, GRAND PRIX 08 (5.3L), SOLSTICE 06
Chevrolet:
COBALT 06 (2.4L), HHR 06 (2.4L), IMPALA 06-09, MALIBU 06-10, MONTE CARLO 06, UPLANDER 06-09, COLORADO 08, CANYON 08, TRAILBLAZER 07-09
Buick:
ALLURE 08-09 (5.3L), LACROSSE 08-09 (5.3L), LUCERNE 06-08, RAINIER 07 (5.3L), ENCLAVE 08
Cadillac:
CTS 06 (V-Series), DEVILLE 05, DTS 06-08, SRX 08 (4.6L), STS 06-08, XLR 06-09
GMC:
ENVOY 07-09, ACADIA 07-08
Saturn:
AURA 08-09, ION 06 (2.4L), RELAY 06 (3.9L), VUE 08-10, OUTLOOK 08
Hummer:
H3 08
Isuzu:
ASCENDER 08, I-290 08, I-370 08
Saab:
9-7X 07-08
Other Models:
MONTANA 06-09 (SV6), TERRAZA 06 (3.9L)
Note: Please match your part number or consult the detailed fitment list if your vehicle has multiple engine/option configurations.
What is VIN programming and why is it important?
What is VIN programming and why is it important?
VIN programming is the process of loading your vehicle’s specific software and settings onto the ECM using your unique 17-digit Vehicle Identification Number (VIN). This is critical because it ensures the module communicates correctly with your engine, transmission, anti-theft system, and other vehicle components. Without it, the car may not start or run properly.
Do I need to do anything after installing this ECM?
Our pre-programming handles the main software flashing. However, some GM vehicles may require a simple security relearn or crankshaft position sensor variation relearn procedure after installation. These can often be performed without special tools and instructions are widely available online or in service manuals.
How do I provide my VIN?
After you complete your purchase, you will need to send us your vehicle’s 17-digit VIN. You can typically add it as a note during checkout or send it to us in a message referencing your order number. We cannot ship the part until we receive the VIN to program it.
Is this compatible with other part numbers?
Yes, this module, service number 12603530, is a direct replacement and is interchangeable with the following GM service numbers: 12590032, 12602044, 12605843, 12607096, 12630457, and 19210737. If your old module has any of these numbers, this part will work for you.