Is Your 2006 HHR Running Rough? It Could Be The PCM.
If your 2006 Chevrolet HHR is experiencing frustrating issues like a persistent check engine light, poor engine performance, stalling, or erratic shifting, the root cause is often a failing Powertrain Control Module (PCM). The PCM is the central computer of your vehicle, responsible for managing everything from fuel injection and ignition timing to transmission operation. When it begins to fail, it can create a cascade of problems that are often misdiagnosed, leading to costly and unnecessary repairs on other components.
This replacement PCM, service number 12599714, is the definitive solution to restore your vehicle’s factory performance and reliability. We take the guesswork out of the repair by programming the module specifically for your vehicle using the VIN you provide. This ensures that all software is current and perfectly matched to your HHR’s specific configuration, making for a seamless installation process.
From the Diagnostic Bay
We once had a 2006 HHR come into the shop with a complaint of random stalling and a check engine light for a throttle position sensor code. The owner had already replaced the throttle body twice with no success. After hooking up our scanner and monitoring live data, we noticed the 5-volt reference signal to the sensors was fluctuating wildly. This isn’t a sensor problem; it’s a computer problem. The PCM was internally shorting, causing the erratic voltage. We installed a VIN-programmed PCM, performed the security relearn, and the HHR ran perfectly. It’s a classic case where chasing codes without understanding the system leads you down the wrong path. The problem wasn’t the parts being commanded; it was the commander itself.
Symptoms of a Failing 2006 HHR PCM
- ✔ Persistent Check Engine Light (CEL) with various codes.
- ✔ Engine stalling or shutting off while driving.
- ✔ Difficulty starting the engine or a no-start condition.
- ✔ Noticeable decrease in fuel economy.
- ✔ Rough or erratic engine idling.
- ✔ Harsh or unpredictable automatic transmission shifting.
- ✔ Failure to pass state emissions testing.
- ✔ Communication errors with diagnostic scan tools.
The Right Part, Programmed and Ready
Don’t settle for a generic, used module from a salvage yard that will require expensive dealer programming. This unit is a direct replacement for your original part and is compatible with a range of service numbers, including 12589998, 12597329, 12600882, and more. Located in the left-hand rear of the engine compartment on the HHR, replacement is straightforward for a competent DIY mechanic. Upon installation, a simple security relearn procedure may be necessary, which can typically be done without special tools. We provide clear instructions to guide you through this process.
By providing us with your Vehicle Identification Number (VIN) during checkout, you ensure that the 2006 HHR PCM you receive has the latest GM-certified software calibration for your exact vehicle. This critical step guarantees proper communication between all vehicle modules, optimal engine performance, and correct transmission function from the moment you install it.
Fitment and Compatibility Information:
This Electronic Control Module is a confirmed fit for the following vehicles with the specified options:
- 2006 Chevrolet HHR: Electronic Control Module; (LH rear engine compartment), 2.2L
- 2006 Chevrolet Cobalt: Electronic Control Module; (LH front engine compartment), 2.2L (VIN F, 8th digit)
- 2006 Pontiac Pursuit: Electronic Control Module; (LH front engine compartment), 2.2L
- 2005 Chevrolet Cobalt: Electronic Control Module; (LH front engine compartment), ID 12589998
- 2005 Pontiac Pursuit: Electronic Control Module; (LH front engine compartment), ID 12589998
Replaces Part Numbers: 12599714, 12589998, 12597329, 12600882, 12600883, 12605766, 12605765
Frequently Asked Questions
Do I need to do anything after installing this PCM?
In most cases, you will need to perform a security relearn procedure, also known as a key relearn. This syncs the new PCM with your vehicle’s anti-theft system. We provide easy-to-follow instructions for this procedure, which typically involves a series of key cycles and does not require special tools.
How do I provide my VIN for programming?
You can enter your vehicle’s 17-digit VIN in the notes section during the checkout process. If you forget, we will contact you via email after your purchase to request it. We cannot ship your part until we have your VIN to ensure correct programming.
Is this a plug-and-play part?
Because we program it to your VIN, it’s as close to plug-and-play as possible. The only additional step is the security relearn procedure. No further dealer programming or flashing is required.
Where is the PCM located on my 2006 HHR?
The PCM on the 2006 HHR is located in the engine compartment on the left-hand (driver’s) side, towards the rear near the firewall. It is a silver metal box with several large electrical connectors.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, then yes, this part will resolve the issue. However, it’s crucial to properly diagnose your vehicle first, as other failing sensors or components can also trigger a check engine light. This module will fix issues directly related to PCM failure.
What if I have the wrong part number?
This module replaces several different service numbers. As long as your vehicle is listed in our compatibility chart and you provide the correct VIN, this PCM will function correctly as a replacement, even if the number on your old part is different from 12599714.