Restore Smooth Shifting to Your 2006-2011 Chevy HHR
If your Chevrolet HHR is suddenly shifting erratically, getting stuck in gear, or has an illuminated check engine light, a failing Transmission Control Module (TCM) is the most common cause. This critical component is the brain of your automatic transmission, and when it fails, it can make your vehicle unreliable and frustrating to drive. This direct-fit T42 TCM, part number 24235732, is the definitive solution, arriving pre-programmed to your vehicle’s VIN for a hassle-free, plug-and-play installation that gets you back on the road without a trip to the dealer.
From the Shop Floor: “Just last month, a 2009 HHR was towed to my shop. The owner was frustrated because it wouldn’t shift past 2nd gear, making it nearly undrivable. A quick scan showed a P0700 code, pointing to a general transmission fault. After checking the basics, we identified the TCM as the source of the electrical failure. Once we installed a VIN-programmed module like this one, the car shifted perfectly on the test drive, and all codes were cleared. This is a classic failure I’ve seen hundreds of times on these GM platforms.”
Is Your HHR Experiencing These Transmission Problems?
A faulty TCM can manifest in several ways. Over my 20+ years as a technician, these are the symptoms I see most often with a failing GM T42 module. See if any of these sound familiar:
- โ Harsh, slamming shifts between gears or delayed engagement from park to drive.
- โ Vehicle is stuck in a single gear, often 2nd or 3rd (commonly known as “limp mode”).
- โ The Check Engine Light or a transmission warning light is on.
- โ Diagnostic Trouble Codes (DTCs) are present, such as P0700 (Transmission Control System Malfunction) or various solenoid codes (e.g., P0751, P0756).
- โ Complete loss of shifting capability or intermittent communication failure with the scanner.
The Plug-and-Play Solution: Your Pre-Programmed 2006-2011 HHR TCM
Don’t let a bad module sideline your vehicle. Our replacement TCM eliminates the guesswork and extra cost of dealership repairs. We handle the complex part for you.
- โ VIN Programmed for Your HHR: We use your vehicle’s VIN to load the latest, most stable GM software directly onto the module. This ensures it works perfectly with your vehicle’s specific configuration right out of the box.
- โ No Additional Programming Needed: Because it’s pre-flashed, you can skip the expensive appointment at a dealership or specialized shop. This is a true DIY-friendly repair.
- โ Restores Factory Performance: By precisely managing shift solenoids and hydraulic pressure, this module restores the crisp, smooth shifting you expect from your transmission.
- โ Built to OEM Standards: Engineered for durability and longevity, this module is designed to withstand the heat and vibration of the engine bay, backed by a solid one-year warranty.
Simple Installation Guide: Get Back on the Road Fast
Replacing the TCM on a Chevy HHR is a straightforward job that typically takes less than 30 minutes. You’ll find it located in the left-hand (driver’s side) of the engine compartment.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the vehicle’s computer systems.
- Locate the TCM: Open the hood and find the module on the driver’s side of the engine bay. It’s a silver box with two large electrical connectors.
- Disconnect and Remove: Carefully unplug the two wiring harness connectors. Note the locking tabs to avoid damaging them. Then, unbolt the module from its mounting bracket and remove it from the vehicle.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Securely reconnect the two wiring harness connectors, ensuring they click into place.
- Final Steps: Reconnect the negative battery terminal. Start the vehicle and use a standard OBD2 scan tool to clear any stored transmission fault codes. Take the vehicle for a test drive to confirm the issue is resolved.
Guaranteed Fitment and Part Number Compatibility
This module is a direct replacement for your 2006-2011 HHR TCM and is also interchangeable with a wide range of other GM vehicles that use the T42 controller. It replaces numerous original part numbers, including: 24252114, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24239926, 24240400, 24241806, 24243901, 24243921, 24255280, 24256960, 24235732, 24235753, and 24240449.