Is Your Savana 3500 Van Stuck in Limp Mode?
If your work van is experiencing harsh, unpredictable shifting, getting stuck in gear, or throwing transmission codes, a failing Transmission Control Module (TCM) is the most likely culprit. For a hard-working vehicle like the GMC Savana 3500, transmission problems mean downtime and lost income. This VIN-programmed T42 TCM, part number 24234503, is the direct-fit, reliable solution to get your van back on the road and working as hard as you do, without a costly trip to the dealership.
Real-World Diagnostics: A Fleet Van Story
“A customer’s 2011 Savana 3500 fleet van came into my shop last month with a classic complaint: it would randomly refuse to shift out of 2nd gear, and the check engine light was on. They were worried they needed a full transmission rebuild, which would have put the van out of service for days. I scanned it and found a P0700 code and several solenoid communication errors. Instead of jumping to the worst-case scenario, we checked the TCM. After installing one of these pre-programmed modules, all the codes cleared, and the van shifted perfectly. It was a 30-minute fix that saved them thousands in potential repair costs and downtime.”
Symptoms of a Failing Savana 3500 TCM
Over my 20+ years in the garage, I’ve seen hundreds of these T42 module failures. The symptoms are often mistaken for internal transmission damage. Watch out for:
- โ Harsh, slamming shifts or delayed gear engagement.
- โ Vehicle is stuck in a single gear (limp mode), often 2nd or 3rd.
- โ Check Engine Light or Transmission Warning Light is illuminated.
- โ Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults.
- โ Inability to upshift or downshift, leading to poor acceleration and fuel economy.
- โ Intermittent loss of communication with the module, causing erratic behavior.
Plug-and-Play Installation: No Dealer Visit Required
This module is delivered to you pre-programmed to your Savana’s specific Vehicle Identification Number (VIN). This critical step ensures it communicates perfectly with your van’s engine computer and other systems right out of the box. Installation is straightforward for any DIYer or professional technician.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset the system.
- Locate the Module: On the 2006-2014 Savana 3500, the TCM is typically found in the engine compartment on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unplug the electrical connectors. Use a small flathead screwdriver to release the locking tabs if necessary. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new TCM into place and securely reconnect the electrical harnesses. You should hear a ‘click’ as they lock in.
- Reconnect and Verify: Reconnect the battery terminal. Start the engine and allow it to run for a few minutes. Use a basic OBD2 scan tool to clear any stored fault codes and confirm the repair.
Why Choose Our Programmed TCM?
Guaranteed Compatibility for Your 2006-2014 SAVANA 3500 Transmission Control Module
This isn’t a generic, one-size-fits-all part. By programming it to your VIN, we ensure it has the correct software and shift strategies for your specific Savana 3500, whether it’s paired with the 4L80E or another GM 4-speed automatic. It’s a precise solution for long-term reliability.
- โ VIN Programmed for You: Eliminates the need for expensive dealer programming tools or appointments.
- โ Restores Performance: Corrects shift points, torque converter lockup, and line pressure for smooth, efficient operation.
- โ Built to OEM Standards: Engineered for durability to handle the demands of a commercial vehicle.
- โ Direct Interchange: A perfect replacement for part numbers 24234503, 24252114, 24239224, 24256960, and others.
- โ No Core Charge: Keep your old part. No need to worry about shipping a core back.