Restore Your Savana’s Shifting Performance
If your 2006-2014 GMC Savana 2500 Van is suffering from erratic shifting, getting stuck in gear, or throwing transmission codes, a failing Transmission Control Module (TCM) is the most likely culprit. As a workhorse vehicle, any downtime is costly. This T42 TCM, part number 24240449, is the definitive solution, arriving fully programmed to your vehicle’s specific VIN. This eliminates the need for expensive dealership visits and gets your van back in service quickly and reliably.
Over my 20 years in diagnostics, I’ve seen countless GM vehicles, especially work vans like the Savana and Express, come in with what seems like a major transmission failure. More often than not, the issue traces back to this single electronic module. Heat cycles and constant vibration cause internal circuits to fail, leading to the frustrating symptoms you’re likely experiencing. Replacing it with a pre-programmed unit is the most efficient and cost-effective repair.
Case Study: A Tricky Diagnosis
A local plumbing contractor brought in his ’11 Savana 2500. The van would randomly refuse to shift out of 2nd gear, but only after it was fully warmed up and had been running for a few hours. The check engine light was on with a generic P0700 code. We checked the fluid, inspected the wiring, and tested the solenoids—all checked out. The problem was intermittent, making it hard to replicate. Based on experience with these T42 modules, we knew heat-soak failure was a classic symptom. We swapped in a VIN-programmed TCM, and the problem was solved instantly. The contractor was back on the job the same day, avoiding a costly and unnecessary transmission rebuild.
Is Your Savana Van Showing These Warning Signs?
A failing TCM will give you clear indicators. If you’re noticing any of the following, it’s time for a replacement:
- âś” Harsh, slamming shifts or delayed gear engagement.
- âś” Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- âś” The Check Engine Light or Transmission Warning Light is illuminated.
- âś” Diagnostic Trouble Codes (DTCs) are present, such as P0700 (Transmission Control System Malfunction), P0750-P0758 (Shift Solenoid errors), or other communication codes.
- âś” Complete failure to upshift or downshift, leading to poor acceleration and fuel economy.
- âś” Intermittent loss of communication with the module, causing unpredictable behavior.
A Straightforward Installation Guide for Your Savana
This is a repair that a confident DIYer or any professional mechanic can complete in under 30 minutes. No special programming tools are required.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and reset the system.
- Locate the Module: On the 2006-2014 Savana 2500 Van, the TCM is typically found in the engine compartment on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unplug the electrical connectors. Be gentle with the locking tabs. Then, unbolt the old module from its mounting bracket.
- Install the New TCM: Mount the new, VIN-programmed module in place and securely fasten it. Reconnect the electrical harnesses, ensuring they click into place.
- Final Steps: Reconnect the negative battery terminal. While the module is plug-and-play, it’s good practice to use a basic OBD-II scan tool to clear any stored fault codes from the ECU. Start the vehicle and test drive to confirm smooth shifting.
Verified Vehicle Compatibility
This T42 TCM is a direct replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions (like the 4L60E, 4L65E, and 4L80E). While this page is focused on the 2006-2014 Savana 2500 TCM, it also fits the following models. Please verify your specific model and year.
Fits: SAVANA 2500 VAN (06-14), EXPRESS 2500/3500 VAN (06-14), SILVERADO 1500/2500 (07-13), SIERRA 1500/2500 (07-13), TAHOE (07-09), YUKON (07-09), IMPALA (06-11), COBALT (06-10), HHR (06-11), COLORADO (08-12), CANYON (08-12), HUMMER H3 (08-10), and many more. Cross-references part numbers: 24252114, 24234503, 24230461, 24234274, 24240449, etc.
Frequently Asked Questions
Do I need to program this module after I receive it?
No. This is a key benefit. We program the module to your vehicle’s VIN before shipping, so it’s ready for immediate plug-and-play installation.
Will this fix a P0700 trouble code?
A P0700 code is a general alert that the transmission system has a fault. A bad TCM is a very common cause. If the TCM is the root of the problem, this part will resolve the code and the underlying issue.
Where is the TCM located on my Savana Van?
For the 2006-2014 Savana and Express vans, the Transmission Control Module is located in the engine compartment on the right-hand (passenger) side.
Is there a core charge for my old part?
No, there is no core charge. You can keep or recycle your old part without the hassle of returning it.
What if I order the wrong part?
We encourage you to verify fitment using your vehicle’s year, make, and model, or by matching the part number 24240449. If you’re unsure, our expert support team is here to help you confirm compatibility before you buy.