Restore Smooth Shifting to Your Pontiac G6
Is your 2006-2010 Pontiac G6 suffering from jerky shifts, delayed gear engagement, or a frustrating Check Engine Light? You’re likely dealing with a failing Transmission Control Module (TCM). This essential component is the brain of your automatic transmission, and when it malfunctions, it can make driving unpredictable and unsafe. This direct-replacement T42 TCM, part number 24230461, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
A Technician’s Notebook: The Intermittent G6 Limp Mode
I had a 2008 Pontiac G6 in the bay last month with a problem that was driving the owner crazy. The car would drive perfectly for days, then suddenly slam into gear and get stuck in “limp mode” with a P0700 code. We checked the wiring and solenoids, which all tested fine. After years of seeing this pattern, I knew the culprit was the TCM itself developing internal faults from heat and vibration. Instead of a costly diagnostic goose chase, we installed a VIN-programmed 2006-2010 Pontiac G6 TCM. The customer was back on the road in less than an hour, and the shifting problems were gone for good. This isn’t just a part; it’s a permanent fix.
Is Your G6 Showing These Warning Signs?
- ✔ Harsh, erratic, or slamming gear shifts.
- ✔ Vehicle is stuck in one gear (often called “limp mode”).
- ✔ Check Engine Light or Transmission Warning Light is on.
- ✔ Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults are present.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ Poor fuel economy and a feeling of lost power.
DIY-Friendly Installation: Get It Done in Under 30 Minutes
One of the best features of this module is its simple, straightforward installation. You don’t need a trip to the dealership or any special programming tools. For the Pontiac G6, the TCM is easy to access and replace.
- Safety First: Always disconnect the negative terminal on your vehicle’s battery before starting any electronic repair.
- Locate the Module: On the Pontiac G6, the TCM is typically found on the driver’s side of the engine bay, mounted to the LH strut tower.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Then, unbolt it from its mounting bracket.
- Install the New TCM: Mount the new module in the same location and securely plug in the connectors. You’ll hear a click as they lock in place.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s always good practice to use a basic scan tool to clear any stored DTCs from the system.
Verified Fitment For Your Vehicle
This T42 Transmission Control Module is a direct replacement for part number 24230461 and other interchangeable numbers. It fits a wide range of General Motors vehicles. Please verify your model and location notes below.
This part will fit these makes and models with these options:
ALLURE 06-09 Transmission; (lower air cleaner housing)
AVALANCHE 1500 07-08 Transmission; (next to battery)
AURA 07-09 Transmission; (LH frame rail front)
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)
ENVOY XL 06 Transmission; (LH engine compartment), (8 cylinder)
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)
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)
MONTANA 06-09 Transmission; (LH strut tower)
PURSUIT 06 Transmission; (LH strut tower)
RAINIER 06-07 Transmission
RENDEZVOUS 06-07 Transmission; (air cleaner box)
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
SIERRA 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
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
SILVERADO 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
SSR 05-06 Transmission; (front LH frame)
SUBURBAN 1500 07-08 Transmission; (next to battery)
TAHOE 07 Transmission; (next to battery)
TAHOE 08-09 Transmission; (next to battery), w/o auxiliary oil cooler pump
TERRAZA 06-07 Transmission; (LH strut tower)
TRAILBLAZER 06-07 Transmission; (LH engine compartment), (8 cylinder)
TRAILBLAZER 08-09 Transmission; (LH engine compartment)
TRAILBLAZER EXT 06 Transmission; (LH engine compartment), (8 cylinder)
UPLANDER 06-09 Transmission; (LH strut tower)
VUE 07-08 Transmission; 2.4L, (LH front engine compartment)
VUE 09 Transmission; 2.4L, w/hybrid, LH side front engine compartment, (shift control)
VUE 09 Transmission; 2.4L, w/o hybrid; (LH front engine compartment)
VUE 10 Transmission
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)
Frequently Asked Questions
What exactly does “VIN Programmed” mean?
It means we load your vehicle’s unique Vehicle Identification Number (VIN) and the latest GM software onto the module before we ship it. This ensures it communicates perfectly with your car’s engine computer and other systems right out of the box, eliminating the need for expensive dealership programming.
Will this fix a P0700 transmission fault code?
A P0700 code is a general fault code indicating the TCM has detected a problem. In many cases, a failing TCM is the root cause, and replacing it with this module will resolve the issue. However, it’s always wise to ensure other components like solenoids and wiring are in good condition.
Is this a difficult part for a DIYer to install?
Not at all. For the G6 and similar models, this is one of the easier electronic repairs. The module is typically accessible in the engine bay, requiring only basic hand tools to swap. The pre-programmed nature of the part makes the electronic side of the job completely plug-and-play.
Do I need to send my old TCM back?
No. We do not require a core return for this part. You can keep or dispose of your old module, saving you the time and hassle of a core charge and return shipping.
Is this the same as an Engine Control Module (ECM)?
No. The TCM (Transmission Control Module) specifically manages the automatic transmission’s functions like shifting and torque converter lockup. The ECM (Engine Control Module) manages the engine’s performance, including fuel, spark, and emissions.