Restore Your HHR’s Performance and Reliability
If you’re dealing with frustrating issues like a persistent check engine light, erratic engine behavior, or a no-start condition in your 2006 Chevrolet HHR, a failing Engine Control Module (ECM) is a very likely culprit. As the brain of your vehicle’s engine management system, when the ECM falters, it can cause a cascade of problems that are often difficult to diagnose. This isn’t just an inconvenience; it’s a critical component failure that can leave you stranded. We offer a dependable and straightforward solution: a professionally programmed ECM, loaded with the latest GM software updates specifically for your vehicle’s VIN.
A Technician’s Notebook: The Intermittent Stall Case
I once had a 2006 HHR in my bay with an issue that was driving the owner crazy. It would stall unpredictably at traffic lights, but then restart and run fine for days. No consistent codes were stored, just a history of random communication faults (U-codes). After checking all the usual suspects—grounds, wiring, fuel pressure—I focused on the ECM. On the bench, I found that slight temperature changes were causing a micro-fracture on the main processor’s circuit board. This is a classic failure mode for these modules. Replacing the faulty unit with a properly programmed ECM, like this one, provided a permanent fix and restored the owner’s confidence in their car.
Is Your HHR Showing These Signs of ECM Failure?
A faulty engine computer can manifest in many ways. If you’re experiencing any of the following, it’s time to consider a replacement 2006 HHR ECM. Over my 20 years of diagnostics, these are the most common symptoms I’ve seen tied directly to a bad module:
- ✔ Unexplained Check Engine Light (CEL) with codes like P0601, P0606, or other internal processor faults.
- ✔ Engine stalling, stumbling, or hesitating for no apparent reason.
- ✔ Complete no-start condition where the engine cranks but won’t fire up.
- ✔ Poor fuel economy and a noticeable loss of power.
- ✔ Transmission shifting problems or harsh engagement.
- ✔ Communication errors when trying to use a diagnostic scan tool.
- ✔ Issues with anti-theft systems or other electronic features malfunctioning.
A Straightforward Guide to Your ECM Installation
One of the biggest benefits of our service is that this module arrives ready to install, saving you a trip to the dealership and costly programming fees. The installation on a 2006 HHR is accessible for a DIYer with basic tools. Follow these steps for a smooth replacement.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow the system to fully discharge.
- Locate the ECM: On your 2006 HHR, the Engine Control Module is typically found in the left-hand (driver’s side) rear of the engine compartment.
- Disconnect the Wiring: Carefully release the locking tabs on the electrical connectors and gently pull them straight out from the module. Never force them. Inspect the connectors for any corrosion or damage.
- Remove the Old Module: Unbolt the mounting hardware that secures the old ECM to its bracket. Set the old module aside.
- Install the New ECM: Mount your new, pre-programmed ECM in place and tighten the bolts. Do not overtighten.
- Reconnect Everything: Plug the wiring harnesses back into the new module until they click securely into place. Reconnect the negative battery terminal.
- Perform Relearn (If Necessary): While this module is programmed to your VIN, some vehicles require a security or crank-sensor relearn procedure. This can often be done without special tools and instructions can be found online or in a service manual. Start the vehicle and check for proper operation.
Verified Vehicle Compatibility
This Engine Control Module, part number 12630457, is a direct replacement for a wide range of General Motors vehicles. While this listing is specifically for the 2006 HHR ECM, it is also interchangeable with service numbers 12590032, 12602044, 12603530, 12605843, 12607096, and 19210737. It fits the following models, provided the options match. Please confirm your part number before ordering.
Frequently Asked Questions
Do I need to do any programming myself?
No. We handle all the programming before we ship. You just need to provide us with your vehicle’s 17-digit VIN during checkout. The module will arrive loaded with the latest GM software, ready for installation.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to access the exact factory calibration file for your specific vehicle. This ensures all systems, from the engine and transmission to the anti-theft system, function exactly as the manufacturer intended.
Is this a simple plug-and-play installation?
For most vehicles, yes. Once you install the module, you’re ready to go. In some rare cases, a simple security relearn procedure may be required, which typically involves a sequence of key turns and doesn’t require special tools.
Will this fix my specific problem?
This ECM is a direct solution for failures within the module itself (e.g., internal processor faults, driver circuit failures). While it resolves the most common electronic issues, you should ensure your vehicle’s wiring, sensors, and grounds are in good condition, as a faulty ECM can have symptoms similar to other failed parts.
What if my original part number is different?
This module is a direct replacement for several service numbers, including 12590032, 12607096, and others listed. As long as your original part number is on our interchange list, this module will function correctly in your vehicle once programmed to your VIN.