Fix Your Buick Rainier’s Shifting Problems for Good
If your 2006-2007 Buick Rainier 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. I’ve seen it countless times in the shop: a great vehicle sidelined by a faulty electronic module. This T42 TCM, part number 24252114, is the definitive solution. It arrives expertly programmed to your vehicle’s specific VIN, making it a true plug-and-play fix that restores the smooth, reliable performance you expect from your Buick.
This isn’t just a replacement part; it’s a permanent fix for the communication errors and solenoid faults that plague these transmissions. As the central command for your 4L60E or 4L65E automatic transmission, this module governs everything from gear selection to torque converter lockup. A faulty one can mimic a major mechanical failure, costing you a fortune in incorrect diagnostics. By installing our pre-programmed module, you bypass the need for an expensive dealership visit and get your Rainier back on the road quickly and affordably.
A Technician’s Notebook: The Rainier That Wouldn’t Shift
A customer brought in a ’07 Rainier, completely frustrated. It was stuck in what felt like third gear—a classic limp-mode symptom—and had a P0700 code on the scanner. They were worried the transmission was shot. After a quick check of the basics, I suspected the T42 TCM. Instead of a costly transmission rebuild, we ordered a VIN-programmed module. Less than an hour after it arrived, the new TCM was in, the codes were cleared, and the Rainier was shifting perfectly. It’s a textbook example of how this single component can solve what seems like a catastrophic failure.
Is Your Rainier Showing These Telltale Signs?
A failing TCM will give you clear warnings. If you’re experiencing any of the following, it’s time for a replacement:
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ Vehicle is stuck in limp mode (usually 2nd or 3rd gear).
- ✔ Check Engine Light is on with transmission codes like P0700 (Transmission Control System Malfunction) or solenoid-specific codes (P0751, P0756, etc.).
- ✔ Inability to upshift or downshift properly.
- ✔ Poor acceleration and decreased fuel economy.
- ✔ Intermittent loss of communication with the module.
Your 30-Minute Installation Guide
For the 2006-2007 Buick Rainier, this is a straightforward job that most DIYers can handle in their own driveway. No specialized tools are needed.
- 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 the Rainier, the TCM is typically found in the engine compartment. Check the driver’s side (LH) of the engine bay.
- Disconnect and Remove: Carefully unclip the wiring harness 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 wiring harnesses. Ensure they click into place.
- Final Steps: Reconnect the battery terminal. Start the vehicle and use a standard OBD2 scan tool to clear any stored diagnostic trouble codes (DTCs) from the computer’s memory.
Verified Fitment For These GM Models
While this page focuses on the Buick Rainier, this T42 TCM is compatible with a wide range of General Motors vehicles. Please verify your part number (24252114) or contact us with your VIN to confirm compatibility.
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)
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)
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)
MONTANA 06-09 Transmission; (LH strut tower)
PURSUIT 06 Transmission; (LH strut tower)
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 08-13 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 08-13 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 07-09 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, (LH front engine compartment)
VUE 10 Transmission
YUKON 07-09 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?
What does ‘VIN Programmed’ actually 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 vehicle’s other computers (like the ECM) right out of the box, eliminating the need for a trip to the dealership for expensive programming.
Do I need any special tools for this installation?
No, you do not. A basic set of sockets or wrenches to remove the mounting bolts and a flathead screwdriver to help with the connector clips are typically all that’s required. An OBD2 scanner is recommended to clear codes after installation.
Will this part fix a P0700 trouble code?
Yes, in most cases. The P0700 code is a general fault code indicating the TCM has detected a problem. Replacing a faulty TCM is the direct solution for this and any related solenoid or sensor codes originating from the module itself.
Is there a core charge for my old part?
No, there is absolutely no core charge. You can keep your old part or dispose of it without the hassle of sending it back to us.
What kind of warranty comes with this module?
This transmission control module is backed by our standard one-year warranty, covering any defects in materials or workmanship for your peace of mind.