Restore Your Tahoe’s Shifting Performance
If your 2007, 2008, or 2009 Chevrolet Tahoe is suffering from harsh shifting, getting stuck in gear, or has an illuminated check engine light, a failing Transmission Control Module (TCM) is the most likely culprit. As a seasoned technician, I’ve seen these symptoms countless times. Drivers often fear a costly transmission rebuild when the real problem is this electronic module. This T42 TCM, part number 24241806, is the definitive solution, engineered to restore the crisp, predictable shifting you expect from your vehicle.
The core of this part’s value lies in our pre-programming service. We flash the module with your vehicle’s specific VIN and the latest GM software updates before it even ships. This means it’s a true plug-and-play component. You can avoid the time, expense, and hassle of a dealership visit for programming. For the DIY mechanic, this is a game-changer, turning a potentially complex repair into a simple, straightforward job. For the professional shop, it means faster turnaround times and a more satisfied customer. This module is the key to resolving communication errors and restoring full functionality to your 4L60E, 4L65E, or 4L70E transmission.
From the Diagnostic Bay
I remember a 2008 Tahoe that came into my shop. The owner was frustrated—the truck would intermittently refuse to shift out of 3rd gear, especially on hot days. He’d already replaced a shift solenoid with no luck and was convinced the transmission was shot. After pulling the codes, I saw a generic P0700 and an intermittent U0100 (Lost Communication with ECM/PCM). Instead of tearing into the transmission, I checked the TCM. Sure enough, heat soak was causing the module to fail. We installed one of these pre-programmed T42 modules, and in under an hour, the Tahoe was shifting perfectly. It saved the customer thousands and reinforced a key diagnostic lesson: always check the electronics first.
Is Your Tahoe Exhibiting These Transmission Faults?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, this module is the likely solution for your 2007-2009 Tahoe TCM issues.
- ✔ Harsh, erratic, or delayed gear shifts.
- ✔ Vehicle stuck in “limp mode” (typically 2nd or 3rd gear).
- ✔ Check Engine Light or Transmission Warning Light is on.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0751, P0756, or other solenoid-related faults.
- ✔ Complete loss of upshifting or downshifting capability.
- ✔ Poor fuel economy directly related to inefficient shifting.
- ✔ Inaccurate gear indicator display on the dashboard.
A Straightforward Guide to a 30-Minute Installation
Installing your new 2007-2009 Tahoe TCM is a simple process that most owners with basic tools can complete in their driveway.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: On most 2007-2009 Tahoes, the TCM is conveniently located in the engine bay, right next to the battery.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old TCM. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical harnesses. You should hear a click as they lock in.
- Reconnect and Verify: Reconnect the negative battery terminal. Start the vehicle and allow it to idle for a few minutes. Check for any warning lights and take it for a test drive to confirm that shifting has returned to normal.
Verified Vehicle Compatibility
While this is the specified part for the 2007-2009 Chevrolet Tahoe, this T42 TCM is also a direct-fit, programmed solution for a wide array of General Motors vehicles. Please confirm your model and year below. This part is interchangeable with service numbers: 24252114, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24239926, 24240400, 24241806, and more.
This part will fit these makes and models with these options
TAHOE 07 Transmission; (next to battery)
TAHOE 08-09 Transmission; (next to battery), w/o auxiliary oil cooler pump
ALLURE 06-09 Transmission; (lower air cleaner housing)
AVALANCHE 1500 07-08 Transmission; (next to battery)
CANYON 08-12 Transmission; (RH rear engine compartment)
COBALT 06-10 Transmission; (LH strut tower)
COLORADO 08-12 Transmission; (RH rear engine compartment)
DTS 06-11 Transmission; (RH front engine compartment)
ENVOY 06-07 Transmission; (LH engine compartment), (8 cylinder)
ENVOY 08-09 Transmission; (LH engine compartment)
EXPRESS 1500 VAN 06-14 Transmission; (RH engine compartment)
EXPRESS 2500 VAN 06-14 Transmission; (RH engine compartment)
EXPRESS 3500 VAN 06-14 Transmission; (RH engine compartment)
G5 07-10 Transmission; (LH strut tower)
G6 06-10 Transmission; (LH strut tower)
GRAND PRIX 06-08 Transmission; (lower air cleaner housing)
HHR 06-11 Transmission; (LH engine compartment)
HUMMER H3 08-10 Transmission; (RH rear engine compartment)
IMPALA 06-11 Transmission; (lower air cleaner housing)
ION 06-07 Transmission; (behind LH strut tower)
LACROSSE 06-09 Transmission; (lower air cleaner housing)
LUCERNE 06-07 Transmission; (4.6L), (LH engine compartment)
LUCERNE 08-11 Transmission; (LH engine compartment)
MALIBU 06-10 Transmission; (LH frame rail)
MONTE CARLO 06-07 Transmission; (lower air cleaner housing)
SAAB 9-7X 06-09 Transmission; (LH engine compartment)
SAVANA 1500 VAN 06-14 Transmission; (RH engine compartment)
SAVANA 2500 VAN 06-14 Transmission; (RH engine compartment)
SAVANA 3500 VAN 06-14 Transmission; (RH engine compartment)
SIERRA 1500 PICKUP 07 Transmission; (new style, smooth door skin), (next to battery)
SIERRA 1500 PICKUP 08 Transmission; (next to battery)
SIERRA 1500 PICKUP 09-13 Transmission; (next to battery), w/o hybrid option
SILVERADO 1500 PICKUP 07 Transmission; (new style, smooth door skin), (next to battery)
SILVERADO 1500 PICKUP 08 Transmission; (next to battery)
SILVERADO 1500 PICKUP 09-13 Transmission; (next to battery), w/o hybrid option
SUBURBAN 1500 07-08 Transmission; (next to battery)
TRAILBLAZER 06-07 Transmission; (LH engine compartment), (8 cylinder)
TRAILBLAZER 08-09 Transmission; (LH engine compartment)
YUKON 07 Transmission; (next to battery)
YUKON 08 Transmission; (next to battery), w/o auxiliary oil cooler control
YUKON 09 Transmission; (next to battery), w/o auxiliary oil cooler pump
YUKON XL 1500 07-08 Transmission; (next to battery)
What does ‘VIN Programmed’ actually mean for me?
What does ‘VIN Programmed’ actually mean for me?
It means this module is ready for installation the moment you receive it. We use your Vehicle Identification Number (VIN) to load the correct factory software for your specific vehicle. This eliminates the need for a trip to the dealership for expensive programming, saving you time and money.
Is this part difficult to install myself?
Not at all. For most DIYers with basic hand tools, this is a very straightforward job. The TCM on a 2007-2009 Tahoe is typically located right next to the battery, making it easy to access and swap out in under 30 minutes.
Will this fix a P0700 trouble code?
In many cases, yes. A P0700 code is a general fault code indicating the TCM has detected a problem. A failing TCM is a very common cause of this code. Replacing it with this programmed unit often resolves the P0700 and any related transmission codes.
Do I need to send my old part back?
No, there is no core charge for this module. You can keep your old part, which simplifies the process for you.
What kind of warranty is included?
This transmission control module comes with a one-year warranty, giving you peace of mind and confidence in your repair.