Restore Your Silverado’s Transmission Performance
Is your 2007-2013 Silverado 1500 struggling with erratic shifting, getting stuck in gear, or throwing transmission codes? Don’t let a faulty Transmission Control Module (TCM) sideline your truck. As a technician with over two decades of experience, I’ve seen firsthand how a failing TCM can mimic a major mechanical failure. This VIN-programmed T42 TCM, part number 24239926, is the reliable, straightforward solution to get your truck’s transmission operating smoothly and predictably again, without a costly trip to the dealership for programming.
This module is the electronic brain of your automatic transmission, controlling everything from shift points and line pressure to torque converter lockup. When it fails, the symptoms can be sudden and severe. Our module is meticulously prepared with your truck’s specific VIN, ensuring it communicates flawlessly with the Powertrain Control Module (PCM) and other vehicle systems right out of the box. This is the definitive fix for the common electronic issues plaguing these otherwise robust 4L60E, 4L65E, and 4L70E transmissions.
From the Diagnostic Bay
I remember a customer bringing in his ’09 Silverado 1500. He was convinced the transmission was shot. It would shift hard from 1st to 2nd when cold, and occasionally it would refuse to shift out of 3rd gear on the highway—a classic limp mode symptom. He’d already spent money on a fluid flush at another shop, with no improvement. I pulled the codes and saw a P0700 (Transmission Control System Malfunction) and an intermittent solenoid circuit code. Instead of jumping to a rebuild, I checked the TCM. After swapping in a pre-programmed unit like this one, the truck shifted like it just rolled off the factory line. It was a 30-minute fix that saved him thousands. This is why a proper diagnosis is key, and why a quality 2007-2013 Silverado 1500 TCM is often the real solution.
Is Your Silverado Showing These Symptoms?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement:
- âś” Harsh, banging, or delayed gear shifts.
- âś” Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- âś” Check Engine Light or Transmission Warning Light is on.
- âś” Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0753, P0758, or other solenoid-related faults are present.
- âś” Inconsistent or no upshifting/downshifting.
- âś” Poor fuel economy and a feeling of sluggish performance.
- âś” Complete loss of communication with the scan tool.
A Straightforward Guide to Installation
One of the best features of this module is its simple installation. You don’t need a lift or specialized transmission tools. For most 2007-2013 Silverado 1500 models, the TCM is located right in the engine bay.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts and to help reset the vehicle’s computer systems.
- Locate the Module: On your Silverado, the TCM is typically found next to the battery under the hood. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unplug the electrical harnesses. They have locking tabs that need to be released. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new, VIN-programmed TCM into place. Securely reconnect the electrical harnesses, ensuring they click into place.
- Final Steps: Reconnect the negative battery terminal. Start the truck and let it idle for a few minutes. If you have a basic scan tool, it’s a good practice to clear any stored fault codes. Take the truck for a test drive to confirm smooth shifting.
Verified Vehicle Compatibility
This T42 TCM is a direct replacement for part number 24239926 and is interchangeable with several other service numbers, including 24252114, 24234503, and 24242391. While this page is focused on the 2007-2013 Silverado 1500 TCM, it also fits a wide range of other GM vehicles:
CHEVROLET COBALT 06-10 (LH strut tower)
CHEVROLET COLORADO 08-12 (RH rear engine compartment)
CHEVROLET EXPRESS 1500/2500/3500 VAN 06-14 (RH engine compartment)
CHEVROLET HHR 06-11 (LH engine compartment)
CHEVROLET IMPALA 06-11 (lower air cleaner housing)
CHEVROLET MALIBU 06-10 (LH frame rail)
CHEVROLET MONTE CARLO 06-07 (lower air cleaner housing)
CHEVROLET SILVERADO 1500 PICKUP 07 (new style, next to battery)
CHEVROLET SILVERADO 1500 PICKUP 08-13 (next to battery, w/o hybrid)
CHEVROLET SILVERADO 2500 PICKUP 07 (new style, 6.0L, next to battery)
CHEVROLET SSR 05-06 (front LH frame)
CHEVROLET SUBURBAN 1500 07-08 (next to battery)
CHEVROLET TAHOE 07-09 (next to battery)
CHEVROLET TRAILBLAZER 06-09 (8 cylinder, LH engine compartment)
GMC CANYON 08-12 (RH rear engine compartment)
GMC ENVOY 06-09 (8 cylinder, LH engine compartment)
GMC SAVANA 1500/2500/3500 VAN 06-14 (RH engine compartment)
GMC SIERRA 1500 PICKUP 07 (new style, next to battery)
GMC SIERRA 1500 PICKUP 08-13 (next to battery, w/o hybrid)
GMC SIERRA 2500 PICKUP 07 (new style, 6.0L, next to battery)
GMC YUKON & YUKON XL 1500 07-09 (next to battery)
BUICK ALLURE/LACROSSE 06-09 (lower air cleaner housing)
BUICK LUCERNE 06-11 (LH engine compartment)
BUICK RAINIER 06-07
BUICK RENDEZVOUS 06-07 (air cleaner box)
CADILLAC DTS 06-11 (RH front engine compartment)
HUMMER H3 08-10 (RH rear engine compartment)
PONTIAC G5/G6 06-10 (LH strut tower)
PONTIAC GRAND PRIX 06-08 (lower air cleaner housing)
SATURN AURA 07-09 (LH frame rail front)
SATURN ION 06-07 (behind LH strut tower)
SATURN VUE 07-10 (2.4L)
SAAB 9-7X 06-09 (LH engine compartment)