Restore Your Buick’s Smooth, Confident Ride
Is your 2006-2007 Buick Rainier’s once-luxurious ride now plagued by harsh, unpredictable shifting or a persistent check engine light? A faulty Transmission Control Module (TCM) is often the culprit, disrupting the refined performance you expect from your SUV. This pre-programmed T42 TCM, service number 24239926, is the direct-fit, reliable solution to restore your Rainier’s precise gear changes and get you back on the road with confidence and peace of mind. By solving the root electronic issue, you can avoid the high cost and uncertainty of a major mechanical repair.
Common Symptoms & Your Solution
If your Rainier is experiencing any of the following issues, a failing TCM is the most likely cause. This module is engineered to be the definitive solution for:
- Abrupt, harsh, or erratic gear shifts
- Delayed engagement when shifting from Park to Drive or Reverse
- Vehicle stuck in a single gear (often called “limp mode”)
- Illuminated Check Engine or Transmission warning lights
- Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults
- Poor acceleration and decreased fuel economy
Features & Tangible Benefits
- ✔ Ready to Install, No Dealer Visit Needed: This module arrives pre-programmed to your Buick Rainier’s specific VIN. This eliminates the need for expensive dealership trips for programming, making it a true plug-and-play solution that ensures perfect communication between your engine and transmission from the moment you install it.
- ✔ Restore Smooth Performance: Regain the precise, effortless gear changes your Buick was designed for. This module corrects erratic shifting, delayed engagement, and slipping, leading to a more enjoyable and predictable driving experience. Using a new 2006-2007 Buick Rainier 24239926 TCM is the key to restoring that factory feel.
- ✔ Built for Lasting Reliability: Constructed to meet or exceed original equipment standards, this TCM is designed for long-lasting durability, ensuring your transmission operates flawlessly for years to come.
- ✔ Purchase with Confidence: This unit is backed by our one-year replacement warranty.
Expert Insight: The Brains Behind the Brawn
Many owners of premium SUVs like the Buick Rainier are surprised when their transmission starts acting up. The T42 TCM is the brain of the operation, and when it fails, it can mimic a major mechanical failure. The key to a successful repair is not just replacing the part, but ensuring the new module is perfectly matched to your vehicle. Our VIN programming process uses the latest GM software updates, which means we’re not just replacing the hardware; we’re giving your vehicle’s transmission logic a fresh start. This often resolves stubborn electronic gremlins that mechanics struggle to diagnose, saving you hundreds in diagnostic fees and preventing a return trip to the shop.
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
No. This module comes fully pre-programmed to your vehicle’s VIN. It is ready for installation right out of the box, saving you time and the high cost of dealership programming.
Where is the TCM located on my 2006-2007 Buick Rainier?
On the Buick Rainier, as with many similar GM SUVs of this era like the Trailblazer and Envoy, the TCM is typically located in the engine compartment on the driver’s side (LH side). Always disconnect the battery before beginning the replacement process.
Will this 2006-2007 Buick Rainier 24239926 TCM fix a P0700 trouble code?
Yes, very likely. The P0700 code is a general transmission fault code, which means the TCM has detected a problem and has requested the check engine light be turned on. A failing TCM is one of the most common reasons for this code to appear.
Is a core charge required for my old part?
No, there is no core charge for this part. You can keep your old module without any hassle or need to return it.
What tools are needed for installation?
Installation is straightforward and typically requires only basic hand tools, such as a socket set and ratchet, to remove the mounting bolts and disconnect the electrical connectors. The entire process can usually be completed in under 30 minutes.