Get Your GMC Savana Shifting Smoothly Again
If your 2006-2014 GMC Savana 1500 Van is suffering from harsh shifting, getting stuck in gear, or throwing transmission codes, the problem is very likely a failing Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen how a faulty TCM can sideline a perfectly good work van or family vehicle. This isn’t just an annoyance; it’s a critical failure that impacts safety, fuel economy, and the overall health of your transmission. This T42 TCM, part number 24252114, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
From the Diagnostic Bay: The Case of the Jerky Work Van
A local contractor brought in his 2011 Savana 1500, complaining it was “slamming” into second gear and sometimes wouldn’t shift past third. The check engine light was on, and his fuel mileage had plummeted. A quick scan showed a P0753 (Shift Solenoid ‘A’ Electrical) and the generic P0700 (Transmission Control System Malfunction) code. While the P0753 points to a solenoid, my experience with these 4L60E transmissions told me to check the source. After verifying the wiring was intact, we knew the TCM was the culprit. These modules are notorious for internal circuit failures that create false solenoid codes. We installed a VIN-programmed Savana 1500 TCM, cleared the codes, and the van was shifting like new in under an hour. The customer saved hundreds by avoiding a dealership visit and unnecessary solenoid replacements.
Is Your Savana Van Showing These Signs of TCM Failure?
A failing TCM doesn’t always mean a complete transmission breakdown. Often, the signs are electronic and intermittent at first. Look out for these classic symptoms before they lead to more expensive mechanical damage.
- ✔ Harsh, delayed, or erratic gear shifts, especially the 1-2 shift.
- ✔ Vehicle is stuck in “limp mode,” refusing to shift out of 2nd or 3rd gear.
- ✔ The Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, P0753, P0758, or other solenoid-related faults.
- ✔ A sudden drop in fuel efficiency for no apparent reason.
- ✔ The transmission seems to slip between gears or fails to engage properly from Park.
- ✔ Intermittent loss of communication with the scan tool.
A Straightforward Installation for Your Savana Van
One of the best features of this module is its simple installation. You don’t need specialized tools or a trip to the dealership. For the GMC Savana or Chevy Express van, the process is particularly easy.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset the system.
- Locate the Module: On your 2006-2014 Savana 1500 Van, the TCM is located in the engine compartment on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old TCM. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount your new, VIN-programmed TCM in the same location and securely reconnect the electrical harnesses. You’ll hear a click as they lock into place.
- Reconnect and Verify: Reconnect the negative battery terminal. Start the vehicle and allow it to idle for a few minutes. If you have a basic scan tool, use it to clear any stored transmission codes.
- Test Drive: Take your van for a test drive to confirm that shifting is smooth and all warning lights are off. The transmission will perform a brief re-learning process.
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 4L70E. While this page focuses on the Savana 1500 TCM, it also fits the following models. Always verify your part number (24252114) or contact us with your VIN.
- ✔ Chevrolet: Silverado, Tahoe, Suburban, Express, Avalanche, Cobalt, HHR, Impala, Malibu, Monte Carlo
- ✔ GMC: Sierra, Yukon, Savana, Envoy, Canyon
- ✔ Buick: LaCrosse, Lucerne, Rainier, Rendezvous
- ✔ Cadillac: DTS
- ✔ Pontiac: G5, G6, Grand Prix, Pursuit
- ✔ Saturn: Aura, Ion, Vue
- ✔ Hummer: H3
- ✔ Saab: 9-7X
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean?
It means we load your vehicle’s unique 17-digit Vehicle Identification Number (VIN) and the latest GM software directly onto the module before shipping. This ensures it communicates perfectly with your van’s engine computer and other systems right out of the box, eliminating the need for expensive dealership programming.
Do I need to send my old TCM back (core charge)?
No, there is absolutely no core charge. You can keep your old part or dispose of it without any hassle or extra fees.
Will this fix my transmission code P0700?
P0700 is a generic code indicating the TCM has detected a fault. This module often resolves the underlying issues that trigger a P0700, such as internal circuit failure or faulty solenoid commands. After installation, clearing the codes will confirm if this was the primary fault.
Is this a difficult part for a DIYer to install?
Not at all. For a Savana van, the TCM is easily accessible in the engine bay. With basic hand tools and our instructions, most people can complete the job in under 30 minutes. The pre-programming is what makes this a simple DIY-friendly repair.
What if I have a different part number on my old module?
This module, 24252114, supersedes many older part numbers. It is interchangeable with service numbers like 24234503, 24242391, 24256960, and others. If you’re unsure, just provide us with your VIN, and we’ll guarantee you get the correct part for your vehicle.