If your 2005-2006 Chevrolet SSR is suffering from erratic shifting, getting stuck in gear, or has an illuminated check engine light, you’re likely dealing with a failed Transmission Control Module (TCM). As a mechanic with over two decades of experience under the hood, I’ve diagnosed this exact issue on countless GM vehicles. The T42 TCM is the electronic brain of your automatic transmission, and when it fails, it can make your unique sport truck feel unpredictable and unsafe. This isn’t a problem you should ignore.
We offer a dependable and straightforward solution: a high-quality replacement T42 TCM, part number 24240449, that comes fully programmed to your SSR’s specific Vehicle Identification Number (VIN). This critical step ensures the module communicates perfectly with your vehicle’s other systems right out of the box, eliminating the need for an expensive and time-consuming trip to the dealership for programming. Restore the crisp, reliable performance your SSR was built for.
Case Study: The Limp-Mode Chevy SSR
A customer brought in a beautiful 2006 SSR, complaining it was stuck in what felt like third gear—a classic case of ‘limp mode.’ The check engine light was on, and my scan tool pulled a P0700 (Transmission Control System Malfunction) and a few solenoid-specific codes. After checking the wiring and fluid, all signs pointed to the TCM. The internal electronics had failed, a common issue from heat cycles and vibration. We installed one of our pre-programmed modules, cleared the codes, and the SSR was shifting perfectly on the test drive. This is the exact fix that gets you back on the road without guesswork.
Is Your SSR Exhibiting These Transmission Problems?
A failing TCM will give you clear warning signs. If you’re experiencing any of the following, it’s time to consider a replacement 2005-2006 SSR TCM:
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ The vehicle is stuck in a single gear (limp mode) and won’t shift up or down.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750-P0758 (solenoid circuit faults), or U0101 (Lost Communication with TCM).
- ✔ A noticeable drop in fuel economy due to inefficient shifting.
- ✔ The transmission seems to slip between gears or fails to engage from Park.
A Straightforward Guide to Your SSR TCM Installation
One of the best parts about this solution is its simplicity. For the DIY enthusiast or professional mechanic, installation is a breeze and can be done in your driveway in under 30 minutes.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the onboard systems.
- Locate the Module: On the 2005-2006 SSR, the TCM is typically mounted on the front left-hand (driver’s side) frame rail. It’s a silver box with electrical connectors.
- Swap the Part: Carefully unplug the wiring harnesses from the old module. Unbolt it from the frame, set the new module in place, and bolt it down securely.
- Reconnect: Firmly plug the wiring harnesses into your new, pre-programmed TCM. Ensure the clips are fully seated.
- Final Steps: Reconnect the battery terminal. Start the vehicle and use a basic OBD2 scan tool to clear any lingering fault codes from the computer’s memory. Your repair is complete!
Verified Vehicle Compatibility
This T42 TCM, part number 24240449, is a direct replacement for a wide range of General Motors vehicles. While this page is focused on the 2005-2006 SSR TCM, it is also compatible with the following models. Please verify your specific part number for a perfect match.
- SSR 05-06 Transmission; (front LH frame)
- ENVOY 06-09 Transmission; (LH engine compartment)
- SAVANA & EXPRESS VANS (1500/2500/3500) 06-14 Transmission; (RH engine compartment)
- SIERRA & SILVERADO (1500/2500) 07-13 Transmission; (next to battery)
- TAHOE & YUKON 07-09 Transmission; (next to battery)
- TRAILBLAZER 06-09 Transmission; (LH engine compartment)
- HUMMER H3 08-10 Transmission; (RH rear engine compartment)
- IMPALA 06-11 Transmission; (lower air cleaner housing)
- COBALT & G5 06-10 Transmission; (LH strut tower)
- And many more GM, Pontiac, Buick, Cadillac, Saturn, and Saab models.
Frequently Asked Questions
Do I need to have this TCM programmed by a dealer?
No. We program the module to your vehicle’s VIN before shipping. It arrives ready for plug-and-play installation, saving you hundreds of dollars and a trip to the dealership.
Is this a new or used part?
This is a high-quality, OEM-spec replacement part that has been expertly prepared and programmed for your vehicle. It is backed by our one-year warranty for your peace of mind.
Will this fix a P0700 trouble code?
A P0700 code is a general transmission fault code, often triggered by a failing TCM. While this module is the most common solution, you should always confirm the diagnosis. If the TCM is the root cause, this part will resolve the code.
What tools are required for installation?
Basic hand tools are all that’s needed. Typically, a simple socket set to unbolt the module and a flathead screwdriver to help with the connector clips are sufficient. No specialized equipment is required.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module or dispose of it at your convenience without the hassle of returning it.