Experiencing Erratic Shifting in Your Buick Rainier?
If your 2006-2007 Buick Rainier is suffering from harsh shifts, delayed gear engagement, or has thrown a check engine light with transmission codes, you’re likely dealing with a failing Transmission Control Module (TCM). As the electronic brain of your automatic transmission, a faulty TCM can make driving frustrating and unpredictable. In my 20+ years as a technician, I’ve seen countless drivers spend a fortune on transmission fluid flushes or solenoid packs, only to find the root cause was the TCM all along.
“A customer’s 2007 Rainier came in last week with what they thought was a completely shot transmissionโit was stuck in 3rd gear. A quick scan showed a P0700 code, a general fault. Instead of quoting a multi-thousand dollar transmission job, we checked the TCM. After installing one of our pre-programmed modules, the vehicle shifted perfectly. They saved thousands by correctly diagnosing the electronic failure first.”
The Direct-Fit Solution: A VIN-Programmed T42 TCM
This T42 Transmission Control Module, corresponding to part number 24235732, is the definitive solution for restoring your vehicle’s performance. We take the guesswork and dealer visits out of the equation. Before shipping, we program the module with your vehicle’s specific VIN and the latest GM software updates. This ensures it communicates perfectly with your Rainier’s engine and transmission systems right out of the boxโno additional programming needed.
Is Your Rainier Showing These Symptoms?
A failing TCM will often present one or more of the following issues. If these look familiar, this module is your likely fix:
- โ Abrupt, harsh, or jerky gear changes.
- โ The vehicle feels stuck in one gear (often called “limp mode”).
- โ Delayed engagement when shifting from Park to Drive or Reverse.
- โ Check Engine Light or Transmission Warning Light is illuminated.
- โ Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults.
- โ Poor acceleration and decreased fuel economy.
Plug-and-Play Installation: No Dealer Visit Required
For the 2006-2007 Rainier Transmission Module, the installation is straightforward for a DIYer or any professional mechanic. You can have your vehicle back to normal in under an hour.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic component replacement.
- Locate the Module: On the Buick Rainier, the TCM is typically found in the engine compartment. Check common GM locations like next to the battery, on the core support, or near the air cleaner box.
- Swap the Part: Carefully disconnect the wiring harnesses from the old module. Unbolt it from its mounting bracket and set it aside. Bolt the new module in its place and securely reconnect the wiring harnesses.
- Final Steps: Reconnect the battery terminal. While the module is pre-programmed, it’s always a good practice to use a basic OBD2 scan tool to clear any stored fault codes from the vehicle’s memory.
Guaranteed Compatibility and Reliability
This module is built to meet or exceed original equipment standards for a long service life. It is a direct replacement for a wide range of GM part numbers, ensuring a perfect fit for your application. This part is interchangeable with service numbers: 24252114, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24239926, 24240400, 24241806, 24243901, 24243921, 24252114, 24255280, 24256960, 24235732, 24235753, 24240449, YNXS, and more. Order today and restore the smooth, reliable shifting your Buick Rainier was designed to deliver.