Restore Peak Performance to Your Workhorse Van
If your 2006-2014 GMC Savana 2500 is your mobile office or your primary work tool, you can’t afford downtime. Erratic shifting, getting stuck in gear, or a glowing check engine light isn’t just an annoyanceâit’s a hit to your productivity. As a technician with over two decades of experience, I’ve seen firsthand how a failing Transmission Control Module (TCM) can bring a perfectly good work van to a halt. This T42 TCM, part number 24234274, is the definitive solution to get you back on the job without the costly delays and programming fees of a dealership visit.
This isn’t just a replacement part; it’s a direct fix. We handle the complex part by pre-programming the module to your vehicle’s specific VIN. This ensures that once installed, it communicates flawlessly with your van’s engine computer and transmission, restoring the crisp, predictable shifting you rely on. It directly manages the 4L60E, 4L65E, 4L70E, or 4L80E automatic transmission, controlling everything from shift points to torque converter lockup for optimal power and fuel efficiency.
Case Study: The Ghost in the Transmission
A local contractor brought in his 2011 Savana 2500, complaining of intermittent, violent downshifts when coming to a stop. He’d already replaced a solenoid pack elsewhere, but the problem persisted. We pulled a generic P0700 (Transmission Control System Malfunction) code, but nothing specific. After monitoring live data, we saw erratic signal drops from the TCM. Heat soak in the engine bay was causing internal solder joints to fail intermittently. We installed one of our VIN-programmed T42 modules. The fix was immediate. The van was back in his fleet the same afternoon, saving him from another day of lost work. This is a classic failure mode for these modules.
Is Your Transmission Sending Out an S.O.S.?
A faulty TCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your module is the culprit:
- â Incredibly harsh or delayed gear engagement from Park to Drive or Reverse.
- â The vehicle is stuck in “limp mode,” refusing to shift out of 2nd or 3rd gear.
- â Check Engine Light or Transmission Warning Light is on with codes like P0700, P0750, or other solenoid-related faults.
- â Sluggish acceleration and a noticeable drop in fuel economy.
- â Complete failure to shift up or down while driving.
- â Intermittent loss of communication with the scan tool or other modules.
A Straightforward Guide to Installation
You don’t need to be a master mechanic to install this part. For the GMC Savana and Chevrolet Express vans, the process is simple and can be done in your driveway in under 30 minutes.
- Safety First: Locate your vehicle’s battery and disconnect the negative terminal to prevent any electrical shorts and help reset the system.
- Locate the Module: On Savana/Express vans, the TCM is typically found in the engine compartment on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unclip the electrical connectors. Be gentle with the locking tabs. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical harnesses. You should hear a click as they lock.
- Final Steps: Reconnect the negative battery terminal. While the module is plug-and-play, it’s always best practice to use a basic scan tool to clear any stored diagnostic trouble codes (DTCs). Start the vehicle and test drive to confirm smooth operation.
Verified Fitment Across the GM Lineup
While this is the go-to solution for the 2006-2014 Savana 2500 TCM, this versatile T42 module is also the correct, VIN-programmed part for a wide range of other GM cars, trucks, and SUVs. Please verify your model and year below.
This part is a direct replacement for multiple service numbers, including 24252114, 24234503, 24230461, 24235340, and more. By ordering from us, you get an OEM-quality part, a one-year warranty, and the peace of mind that comes from a permanent fix.
Do I need to take my van to the dealership for programming?
Do I need to take my van to the dealership for programming?
No. This is the biggest benefit of our service. We pre-program the module to your vehicle’s VIN before shipping it. This makes the installation plug-and-play, saving you hundreds in dealership programming fees and towing costs.
What information do you need from me?
Do I need to take my van to the dealership for programming?
No. This is the biggest benefit of our service. We pre-program the module to your vehicle’s VIN before shipping it. This makes the installation plug-and-play, saving you hundreds in dealership programming fees and towing costs.
Is this part difficult to install for a DIYer?
Do I need to take my van to the dealership for programming?
No. This is the biggest benefit of our service. We pre-program the module to your vehicle’s VIN before shipping it. This makes the installation plug-and-play, saving you hundreds in dealership programming fees and towing costs.
Will this fix a P0700 code?
Do I need to take my van to the dealership for programming?
No. This is the biggest benefit of our service. We pre-program the module to your vehicle’s VIN before shipping it. This makes the installation plug-and-play, saving you hundreds in dealership programming fees and towing costs.
Is there a core charge?
Do I need to take my van to the dealership for programming?
No. This is the biggest benefit of our service. We pre-program the module to your vehicle’s VIN before shipping it. This makes the installation plug-and-play, saving you hundreds in dealership programming fees and towing costs.