Restore Crisp, Reliable Shifting to Your Buick Rendezvous
If your 2006-2007 Buick Rendezvous is suffering from erratic shifting, getting stuck in gear, or throwing transmission-related trouble codes, a failing Transmission Control Module (TCM) is the most likely culprit. As a seasoned technician with over two decades of experience, I’ve seen countless GM vehicles, including the Rendezvous, sidelined by these exact issues. This replacement T42 TCM, part number 24230461, is the definitive solution to get your vehicle driving smoothly again, without the exorbitant costs and scheduling hassles of a dealership visit.
The TCM is the electronic brain of your automatic transmission. It processes data from various sensors to command precise gear changes, manage torque converter clutch lockup, and monitor overall transmission health. When it fails, the symptoms can range from annoying to debilitating, often leading to a complete loss of drivability. This module is expertly pre-programmed to your vehicle’s specific VIN, ensuring it works perfectly right out of the box. This critical step eliminates the need for expensive scan tools or a trip to the dealer for programming, making it a perfect fix for both professional mechanics and capable DIYers.
Case Study: The Intermittent Limp Mode Rendezvous
A customer brought in their ’07 Rendezvous with a frustrating problem: it would randomly drop into “limp mode,” getting stuck in 3rd gear, but only after driving for about 20 minutes. The check engine light was on with a P0758 code (Shift Solenoid B Electrical). Another shop had already replaced the solenoid pack, but the problem persisted. My diagnostic process led me to the TCM. On these Rendezvous models, the TCM is located under the air cleaner box. Over years of heat cycles and vibration, the internal circuit board connections can develop microscopic cracks, causing intermittent failures like this one. After installing our VIN-programmed TCM, the problem was solved permanently. The customer saved hundreds on what could have been a wild goose chase replacing more internal transmission parts.
Is Your Rendezvous Exhibiting These Telltale Signs?
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ The vehicle feels stuck in one gear (often 2nd or 3rd) and will not shift up or down.
- ✔ Check Engine Light or Transmission Warning Light is illuminated on the dash.
- ✔ Common Diagnostic Trouble Codes (DTCs) stored, such as P0700, P0751, P0756, or other solenoid-related faults.
- ✔ A noticeable decrease in fuel economy due to inefficient shifting.
- ✔ Complete failure to shift or move after starting the vehicle.
A Straightforward Guide to Your 2006-2007 Rendezvous TCM Installation
Installing your new TCM is a simple process that can be completed in under 30 minutes with basic hand tools. For the 2006-2007 Buick Rendezvous, the module is conveniently located under the air cleaner box in the engine compartment.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the vehicle’s computer systems.
- Access the Module: Locate and remove the air cleaner housing assembly. This will give you clear access to the TCM mounted below it.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old TCM. Press the release tabs firmly to avoid damaging the clips. Then, unbolt the module from its mounting bracket and remove it from the vehicle.
- Install the New TCM: Mount the new, pre-programmed TCM onto the bracket and securely fasten the bolts. Reconnect the electrical harnesses, ensuring they click into place.
- Reassemble and Finalize: Reinstall the air cleaner box. Reconnect the negative battery terminal. Start the vehicle and allow it to idle for a few minutes. If you have a basic OBD2 scanner, it’s good practice to clear any lingering fault codes.
Verified Vehicle Compatibility List
This T42 TCM is a direct replacement for part number 24230461 and is interchangeable with a wide array of other GM service numbers. While it is guaranteed to fit the 2006-2007 Buick Rendezvous, it also fits many other vehicles. Please verify your part number or consult the list below. This part fits these makes and models with these options:
- Buick Allure: 2006-2009 (lower air cleaner housing)
- Buick LaCrosse: 2006-2009 (lower air cleaner housing)
- Buick Lucerne: 2006-2011 (LH engine compartment)
- Buick Rainier: 2006-2007
- Buick Rendezvous: 2006-2007 (under air cleaner box)
- Cadillac DTS: 2006-2011 (RH front engine compartment)
- Chevrolet Avalanche 1500: 2007-2008 (next to battery)
- Chevrolet Cobalt: 2006-2010 (LH strut tower)
- Chevrolet Colorado: 2008-2012 (RH rear engine compartment)
- Chevrolet Express/GMC Savana Vans (1500/2500/3500): 2006-2014 (RH engine compartment)
- Chevrolet HHR: 2006-2011 (LH engine compartment)
- Chevrolet Impala: 2006-2011 (lower air cleaner housing)
- Chevrolet Malibu: 2006-2010 (LH frame rail)
- Chevrolet Monte Carlo: 2006-2007 (lower air cleaner housing)
- Chevrolet Silverado/GMC Sierra (1500/2500): 2007-2013 (next to battery, specific options apply)
- Chevrolet SSR: 2005-2006 (front LH frame)
- Chevrolet Suburban 1500: 2007-2008 (next to battery)
- Chevrolet Tahoe/GMC Yukon: 2007-2009 (next to battery)
- Chevrolet Trailblazer/GMC Envoy: 2006-2009 (LH engine compartment, 8 cylinder options)
- GMC Canyon: 2008-2012 (RH rear engine compartment)
- Hummer H3: 2008-2010 (RH rear engine compartment)
- Pontiac G5/G6/Grand Prix/Pursuit: 2006-2010 (LH strut tower)
- Saturn Aura/Ion/Vue: 2006-2010 (various locations)
- Saab 9-7X: 2006-2009 (LH engine compartment)
Frequently Asked Questions
What does ‘VIN Programmed’ mean for my Rendezvous?
It means we load the module with the latest GM-certified software that is specific to your vehicle’s Vehicle Identification Number (VIN). This ensures the TCM communicates perfectly with your engine computer and other systems for optimal shift points, fuel economy, and performance, eliminating any need for dealer programming.
Do I need to send my old TCM back?
No, there is no core charge or requirement to return your old part. You can dispose of it or keep it, making the repair process faster and more convenient for you.
Will this fix a P0700 trouble code?
A P0700 is a generic code indicating the TCM has detected a fault. Often, the root cause is the TCM itself failing. Replacing a faulty TCM will typically resolve the P0700 code along with any other specific transmission codes it was storing.
Is this a difficult part for a DIYer to install?
Not at all. For the 2006-2007 Rendezvous, the location under the air box is quite accessible. With basic tools and our provided instructions, most home mechanics can complete the job in under 30 minutes.
My original part number is 24234503. Will this part work?
Yes. Part number 24230461 is part of a family of interchangeable GM T42 modules. It directly supersedes and replaces many other part numbers, including 24234503, 24252114, and others listed in the product details, while providing the same or better performance.