If your 2006-2009 SAAB 9-7X is suffering from unpredictable shifting, getting stuck in gear, or has an illuminated check engine light, you’re likely dealing with a failed Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen firsthand how a faulty TCM can make a reliable vehicle feel unsafe and unpredictable. The TCM is the electronic brain of your automatic transmission, and when it fails, it can cause a cascade of frustrating and potentially damaging problems. This isn’t just an inconvenience; it’s a critical component for your vehicle’s performance and safety.
This T42 Transmission Control Module is the definitive solution for your SAAB 9-7X. It arrives at your door expertly pre-programmed to your vehicle’s specific VIN. This means you can skip the expensive trip to the dealership for programming—it’s a true plug-and-play fix. We load the latest GM software updates, ensuring optimal communication between your engine and transmission for smooth, precise gear changes and restored fuel economy. This is the same high-quality part designed to solve the issues plaguing the 4L60E, 4L65E, and 4L70E transmissions found in your vehicle.
Is Your SAAB 9-7X Showing These Signs?
- âś” Harsh, slamming shifts or erratic gear hunting.
- âś” The vehicle is stuck in “limp mode,” usually only allowing 2nd or 3rd gear.
- âś” Check Engine Light is on with transmission-related Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0753, or other solenoid-specific codes.
- âś” Delayed engagement when shifting from Park to Drive or Reverse.
- âś” Complete failure to upshift or downshift, leading to poor acceleration.
- âś” A noticeable drop in fuel efficiency due to improper gear selection.
A Technician’s Notebook: The Misleading Solenoid Code
A customer brought in a 2008 SAAB 9-7X with a classic complaint: harsh shifting and a P0753 code for Shift Solenoid ‘A’ Electrical. The previous shop had already replaced the solenoid inside the transmission pan—a costly and messy job—but the problem remained. My diagnostic process led me to the TCM. On these GM platforms, the TCM drivers that control the solenoids can fail internally, creating an open or shorted circuit that the computer *thinks* is a bad solenoid. After installing one of our pre-programmed TCMs, the code vanished and the transmission shifted like new. It’s a prime example of how a bad module can send you chasing the wrong parts.
Plug-and-Play Installation: Get Back on the Road Fast
- âś” Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- âś” Locate the Module: On the 2006-2009 SAAB 9-7X, the TCM is typically located in the engine compartment on the driver’s side (LH side).
- âś” Disconnect and Remove: Carefully unplug the electrical connectors. Be gentle with the locking tabs. Then, unbolt the old module from its mounting bracket.
- âś” Install the New TCM: Mount the new, pre-programmed module in place and securely fasten the bolts. Reconnect the electrical harnesses, ensuring they click into place.
- âś” Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s always best practice to use a standard OBD-II scan tool to clear any lingering fault codes from the vehicle’s memory. Start the vehicle and test drive to confirm smooth operation.
Verified Vehicle Compatibility
This module, part number 24239224, is a direct replacement for a wide range of General Motors vehicles. While this page is focused on the 2006-2009 SAAB 9-7X TCM, it also fits the following models. Please verify your specific model and location notes.
- SAAB 9-7X 2006-2009 (Transmission; LH engine compartment)
- Chevrolet Trailblazer 2006-2009 (V8 models; LH engine compartment)
- GMC Envoy / Envoy XL 2006-2009 (V8 models; LH engine compartment)
- Chevrolet Silverado & GMC Sierra 1500/2500/3500 (See full list for year ranges and locations)
- Chevrolet Tahoe, Suburban, Avalanche & GMC Yukon, Yukon XL (See full list for year ranges)
- Cadillac DTS, Buick Lucerne, Chevrolet Impala, and many more. Refer to the detailed fitment list for confirmation.
Frequently Asked Questions
Do I need to have this module programmed by a dealer?
No. This is the biggest benefit we offer. We program the module to your vehicle’s VIN before shipping, so it’s ready for installation right out of the box. This saves you time and the high cost of dealership programming.
Is this a new or used part?
This is a high-quality, OEM-standard replacement part, inspected and programmed to ensure reliability and performance. It is backed by our one-year warranty.
What if I order the wrong part?
We encourage you to verify fitment using your vehicle’s year, make, and model, or by matching the part number 24239224. If you have any doubts, our expert support team is here to help you confirm compatibility before you buy.
Is there a core charge for my old TCM?
No, there is no core charge. You can keep your old part or dispose of it without the hassle of sending it back to us.
Will this fix a P0700 trouble code?
A P0700 is a generic code indicating the TCM has detected a fault. Often, a failing TCM is the root cause. Replacing it with this programmed module is a very common and effective fix for a P0700 accompanied by other transmission-specific codes.