Is Your Chevrolet HHR Shifting Erratically?
If you’re experiencing harsh shifts, delayed gear engagement, or your 2006-2011 Chevrolet HHR is stuck in limp mode, a failing Transmission Control Module (TCM) is the most likely culprit. The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every shift, managing torque converter lockup, and monitoring transmission health. When it fails, it can cause a cascade of frustrating and potentially damaging issues, from poor fuel economy to a complete inability to shift gears, often accompanied by a check engine light and transmission-related diagnostic trouble codes (DTCs).
The Plug-and-Play Solution for Your Transmission Problems
This T42 Transmission Control Module is the definitive solution for your vehicle’s transmission woes. It arrives at your door pre-programmed to your HHR’s specific Vehicle Identification Number (VIN). This critical step ensures seamless communication between the module and your vehicle’s other electronic systems right out of the box. You can bypass the expensive and time-consuming trip to the dealership for programming; this module is ready for a straightforward, plug-and-play installation. We load the latest GM software updates, which can resolve inherent factory issues and improve overall transmission function.
We had a 2009 HHR come into the shop with a classic complaint: intermittent harsh 1-2 shifts and a P0752 (Shift Solenoid ‘A’ Stuck On) code. The owner had already replaced the solenoid twice at another shop, but the problem kept returning. After a quick diagnostic check, we suspected the TCM. The internal drivers that control the solenoids can weaken over time, sending incorrect signals. Instead of throwing more parts at it, we installed a VIN-programmed T42 TCM. The shifting instantly smoothed out, the code was cleared, and it never came back. It’s a textbook case of how a faulty module can mimic a mechanical failure, making accurate diagnosis key.
Signs You Need a 2006-2011 HHR Transmission Control Module
A failing TCM can manifest in various ways. If your vehicle is exhibiting any of the following symptoms, it’s time to consider a replacement to prevent further damage to your transmission’s mechanical components.
- âś” Unpredictable or harsh shifting between gears.
- âś” The vehicle gets stuck in a single gear (limp mode), often 2nd or 3rd.
- âś” Illumination of the Check Engine Light or Transmission Warning Light.
- âś” Diagnostic Trouble Codes (DTCs) stored, such as P0700, P0750, or other solenoid-specific codes.
- âś” Delayed engagement when shifting from Park to Drive or Reverse.
- âś” A noticeable decrease in fuel efficiency.
- âś” The transmission feels like it’s slipping or failing to engage properly.
Quality and Compatibility You Can Trust
This module is built to meet or exceed original equipment standards, ensuring long-lasting reliability and performance. It is a direct replacement for a wide range of GM part numbers, including 24252114, 24234503, 24230461, and YNXS. Installation is simple for a DIY mechanic or a professional technician. On the 2006-2011 HHR, the TCM is typically located in the LH (driver’s side) engine compartment. Always disconnect the battery before swapping the module to allow the vehicle’s systems to reset. After installation, use a scan tool to clear any lingering fault codes. Best of all, there is no core charge, so you don’t have to worry about the hassle and expense of sending your old part back.
Frequently Asked Questions
What is VIN programming and why do I need it?
VIN programming configures the module with your vehicle’s specific software and calibration files. This is essential for the transmission to function correctly with your HHR’s engine and electronics. Our pre-programming service saves you a trip to the dealer and ensures the part works perfectly upon installation.
Is this a difficult part to install myself?
For most individuals with basic mechanical skills, this is a straightforward installation. The TCM on a 2006-2011 HHR is located in the driver’s side engine compartment, making it easily accessible. The process involves disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and installing the new one. The entire job typically takes less than 30 minutes.
Will this TCM fix my specific error codes like P0700?
This module is designed to resolve issues caused by a faulty TCM, which are often the root cause of codes like P0700 (Transmission Control System Malfunction) and various solenoid circuit codes (e.g., P0750-P0758). While it corrects the electronic failure, it’s always wise to ensure there are no underlying mechanical issues in the transmission itself.
Do I need to return my old part (core charge)?
No, there is absolutely no core charge for this part. You can keep your old module, dispose of it, or save it without any obligation or extra fees.
How do I know this part is compatible with my HHR?
This T42 TCM is the correct module for all 2006-2011 Chevrolet HHR models with an automatic transmission. By providing your VIN during checkout, we ensure it is programmed with the exact software for your specific vehicle configuration, guaranteeing a perfect match.