Are you experiencing frustrating and unpredictable transmission behavior in your Chevrolet HHR? Harsh shifts, getting stuck in gear, or a persistent check engine light can make every drive a stressful experience. Restore your vehicle’s performance and your peace of mind with our pre-programmed T42 Transmission Control Module (TCM), the definitive solution for getting your HHR running smoothly again.
Common Symptoms & Your Solution
A failing TCM is often the hidden culprit behind a host of transmission problems. If you’re noticing issues like erratic or delayed shifting, the vehicle entering “limp mode” (stuck in 2nd or 3rd gear), or transmission-related warning lights on your dash, this module is the fix you need. It is specifically designed to resolve common Diagnostic Trouble Codes (DTCs) such as P0700, P0750, and various solenoid performance codes without any further adjustments. This Programmed HHR Transmission Control Module is engineered to be a direct, effective replacement, restoring the precise, factory-level communication between your engine and transmission.
- ✔ 100% Plug-and-Play: This module arrives pre-programmed to your HHR’s specific Vehicle Identification Number (VIN). This critical step eliminates the need for expensive dealership programming, saving you time and money. Simply install it, and you’re ready to go.
- ✔ Restored Performance & Efficiency: By precisely managing shift points, torque converter lockup, and line pressure, this TCM restores the smooth, responsive feel your vehicle had when it was new. This also contributes to improved fuel economy and reduced strain on your transmission.
- ✔ OEM-Standard Quality: Manufactured to meet or exceed original equipment specifications, ensuring reliable performance and long-term durability under all driving conditions.
- ✔ Broad GM Compatibility: While perfect for your HHR, this T42 TCM is also a direct replacement for a wide range of GM vehicles, interchangeable with service numbers like 24252114, 24234503, and 24256960.
- ✔ Guaranteed Reliability: This unit is backed by our one-year replacement warranty. Drive with confidence knowing your purchase is protected.
Expert Insight: The Brains of Your Transmission
Think of the TCM as the central computer for your automatic transmission. It constantly analyzes data from your engine speed, vehicle speed, and throttle position to make split-second decisions on when to shift. When it fails, the communication breaks down, leading to the jarring shifts and poor performance you feel. Our VIN-programming service isn’t just a convenience—it’s essential for ensuring this new ‘brain’ speaks the exact same language as the rest of your HHR’s electronic systems, providing a seamless and lasting repair.
Installing this Programmed HHR Transmission Control Module is a straightforward process for any competent DIYer or professional technician. Located in the engine compartment (typically on the LH side), it can be replaced in under an hour. By choosing this pre-programmed unit, you’re not just buying a part; you’re buying a complete, hassle-free solution to get your vehicle back on the road reliably. Don’t let a faulty TCM dictate your driving experience any longer.
Frequently Asked Questions
Do I need to take my car to a dealer after installation?
No. The primary benefit of our module is that it comes pre-programmed to your vehicle’s VIN. This eliminates the need for any additional programming or setup at a dealership, making it a true plug-and-play installation.
Is this module difficult to install?
For someone with basic mechanical skills, the installation is quite simple. The TCM is located in the engine compartment of the HHR and is typically held in place by a few bolts and electrical connectors. We always recommend disconnecting the battery before starting the repair.
How do I know if my TCM is failing?
Common signs include harsh or erratic shifting, delayed gear engagement, the vehicle being stuck in one gear (limp mode), and the illumination of the check engine or transmission warning light. Diagnostic codes like P0700 are a strong indicator of a TCM-related issue.
Will this fix a P0700 error code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause that triggers the P0700, it’s always best to have the specific transmission codes read to confirm the diagnosis. This part is designed to fix the internal electronic failures that lead to these codes.
What is a core charge?
A core charge is a deposit that is returned to you when you send back your old part. We do not require a core charge for this module, so you can keep your old part without any hassle.