Restore Peak Performance to Your Workhorse Van
As a professional who relies on your 2006-2014 GMC Savana 2500, you know that vehicle downtime isn’t just an inconvenience—it’s lost income. When your transmission starts acting up, with harsh shifts, delayed engagement, or getting stuck in limp mode, the culprit is often a failing Transmission Control Module (TCM). This replacement T42 TCM, part number 24243901, is the definitive solution. It comes pre-programmed to your van’s specific VIN, ensuring a seamless, plug-and-play installation that gets you back on the road without a costly trip to the dealership.
Case Study: A Tricky Diagnosis
I once had a local delivery company bring in a 2011 Savana 2500 with a complaint that stumped their regular mechanic: intermittent, violent shifts and a random P0700 code that would appear and disappear. The transmission fluid was clean, and the solenoids tested fine. After connecting my high-level scanner, I monitored the TCM data stream during a test drive. I saw erratic pressure control solenoid commands that didn’t match the driving conditions. This pointed directly to a failing logic board inside the TCM. We replaced it with one of our VIN-programmed units, and the van was back in service the same afternoon, shifting perfectly. This is a classic failure mode for these hard-working vans.
Is Your Savana Van Showing These Transmission Red Flags?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s time to consider a replacement. In my 20+ years of experience, these are the most common indicators of a faulty Savana 2500 Transmission Control Module.
- âś” Harsh, banging shifts or erratic gear changes.
- âś” Vehicle is stuck in “limp mode,” usually in 2nd or 3rd gear.
- âś” The Check Engine Light or Transmission Warning Light is on.
- âś” Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0753, P0758, or other solenoid-related codes are present.
- âś” Delayed engagement when shifting from Park to Drive or Reverse.
- âś” Poor fuel economy and a feeling of lost power.
- âś” Complete loss of communication with the TCM.
Get Your Van Back to Work: A 30-Minute Installation Guide
One of the best features of this module is its straightforward installation. You don’t need specialized tools or a trip to the dealer. For the GMC Savana 2500, the process is simple.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the TCM: On the Savana and Express vans, the TCM is typically found in the engine compartment on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, VIN-programmed TCM into place and securely reconnect the electrical connectors. You’ll hear a click when they are properly seated.
- Reconnect and Verify: Reconnect the 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 fault codes. Take the van for a test drive to confirm that shifting is smooth and responsive.
Verified Fitment For These GM Models
This T42 TCM is a direct replacement for a wide array of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, 4L70E, and 4L80E. While this page focuses on the Savana 2500 Transmission Control Module, it is also compatible with the following:
GMC: Savana 1500/2500/3500, Sierra 1500/2500, Yukon, Yukon XL, Envoy, Canyon
Chevrolet: Express 1500/2500/3500, Silverado 1500/2500, Tahoe, Suburban, Avalanche, Impala, Monte Carlo, Cobalt, HHR, Colorado, SSR, Malibu
Buick: LaCrosse, Lucerne, Allure, Rendezvous, Rainier
Cadillac: DTS
Pontiac: G5, G6, Grand Prix, Pursuit
Saturn: Vue, Aura, Ion
Hummer: H3
Saab: 9-7X
No. This module is delivered to you pre-programmed to your vehicle’s specific VIN. This makes it a true plug-and-play solution, saving you the time, cost, and hassle of a dealership visit.
There is no core charge required for this part. You can keep your old module or dispose of it at your convenience without any additional fees or return processes.
Installation typically only requires basic hand tools, such as a socket set or wrench to unbolt the module and disconnect the battery. No specialized electronic equipment is necessary.
A P0700 code is a general transmission fault request from the TCM to the ECM to turn on the check engine light. While a faulty TCM is a very common cause, this code indicates a problem has been detected within the transmission system. Replacing a faulty TCM often resolves the P0700 code and the underlying issue causing it.
This transmission control module is backed by our one-year, hassle-free warranty, giving you peace of mind and confidence in your repair.