Restore Smooth Shifting to Your 2006-2011 Chevrolet HHR
If your Chevy HHR is suffering from harsh shifting, getting stuck in gear, or throwing transmission-related check engine lights, a failing Transmission Control Module (TCM) is the most likely culprit. As a technician with over two decades of experience, I’ve seen countless GM vehicles, including the versatile HHR, sidelined by these exact issues. This isn’t just an annoyance; it’s a critical failure that affects your vehicle’s drivability, safety, and fuel economy. Our replacement HHR Transmission Control Module, part number 24235753, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
The TCM is the brain of your automatic transmission, responsible for orchestrating every gear change with precision. When it fails, communication between the engine and transmission breaks down, leading to the frustrating symptoms you’re likely experiencing. Instead of a costly and time-consuming trip to the dealership for diagnostics and programming, this module allows you to get the job done right in your own garage, often in less than 30 minutes.
Case Study: A Tricky Diagnosis
A 2009 HHR was towed to my shop last month. The owner was frustrated—it wouldn’t shift past 2nd gear, and the check engine light was on. A quick scan pulled a generic P0700 (Transmission Control System Malfunction) and a more specific code for a shift solenoid circuit. The owner had already replaced the solenoid with no luck. After checking the wiring harness for continuity, I suspected the TCM. These modules are known to develop internal faults that mimic solenoid failures. We swapped in a VIN-programmed TCM, cleared the codes, and the HHR shifted perfectly on the test drive. It’s a classic example of how a faulty module can send you chasing the wrong parts, while the real fix is often simpler and more direct.
Is Your HHR Showing These Telltale Signs?
A failing TCM will give you clear warnings. If you’re noticing any of the following, it’s time to diagnose the module:
- ✔ Erratic and Harsh Shifting: Your HHR may slam into gear, hesitate, or shift at the wrong RPMs.
- ✔ Stuck in Limp Mode: The transmission may refuse to shift out of a single gear (usually 2nd or 3rd) to prevent further damage.
- ✔ Warning Lights: The Check Engine Light or a specific transmission warning light will illuminate on your dash.
- ✔ Diagnostic Trouble Codes (DTCs): Common codes include P0700, P0753, P0758, or other solenoid-related faults.
- ✔ Poor Fuel Economy: Inefficient shifting directly leads to your engine working harder and burning more fuel.
- ✔ No Communication: In some cases, a scan tool cannot communicate with the TCM at all, indicating a complete module failure.
Your 30-Minute HHR TCM Installation Guide
One of the best features of this part is its straightforward installation. You don’t need a professional lift or specialized tools. For the 2006-2011 Chevy HHR, the process is simple.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the TCM: On the HHR, the Transmission Control Module is typically found in the engine compartment on the left-hand (driver’s) side.
- Disconnect and Remove: Carefully unclip the electrical connectors from the old module. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Reconnect the electrical connectors, ensuring they click securely into position.
- Final Steps: Reconnect the battery terminal. While our programming handles the critical setup, it’s good practice to use a basic OBD-II scan tool to clear any stored fault codes from the ECU. Start the vehicle and take it for a test drive to confirm smooth shifting.
Confirmed Fitment For Your Chevrolet HHR
This module is a direct-fit replacement for the following vehicle, providing a reliable and lasting repair. It is also interchangeable with a wide range of GM part numbers, including 24242391, 24234503, and 24252114.
- Chevrolet HHR: 2006, 2007, 2008, 2009, 2010, 2011 (Located in LH engine compartment)
Frequently Asked Questions
Do I need to take my HHR to a dealer after installing this TCM?
No. This module is delivered fully programmed to your vehicle’s VIN. The programming process ensures it communicates correctly with your HHR’s engine computer and other systems right out of the box, eliminating the need for expensive dealership programming.
What information do you need to program the module?
We only need your vehicle’s 17-digit Vehicle Identification Number (VIN). You can typically find this on your driver’s side dashboard (visible through the windshield), on the driver’s door jamb sticker, or on your vehicle’s registration and insurance documents.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause (like an internal short or failed driver), you should ensure other components like wiring and solenoids are in good condition. In a majority of cases I’ve diagnosed, a faulty TCM is the primary cause behind a persistent P0700.
Is this a difficult part for a DIYer to install?
Not at all. The HHR Transmission Control Module is located in an accessible part of the engine bay. With basic hand tools and our step-by-step guide, most DIY enthusiasts can complete the replacement in under 30 minutes.
What is the warranty on this part?
This module comes with a one-year warranty, giving you peace of mind and confidence in your repair.