Is Your 2006 GMC Envoy XL Shifting Erratically?
If your 2006 Envoy XL is slamming into gear, hesitating between shifts, or feels like it has lost power, you’re likely dealing with a failing Transmission Control Module (TCM). As the electronic brain of your 4L60E or 4L65E automatic transmission, the TCM is responsible for every gear change. When it fails, it can make your reliable SUV feel unpredictable and unsafe to drive. Over my 20+ years in the shop, I’ve seen these exact issues hundreds of times on GM vehicles of this era.
Real-World Diagnosis: “A customer’s 2006 Envoy XL came in last week with the check engine light on and stuck in 3rd gear. The scanner pulled a P0700 (Transmission Control System Malfunction) and a few solenoid circuit codes. He was worried he needed a full transmission rebuild. After confirming the wiring harness was intact, we identified the TCM as the culprit. We installed one of our VIN-programmed modules, cleared the codes, and he was back on the road in under an hour with the transmission shifting perfectly. It’s a common failure that often gets misdiagnosed as a major mechanical problem.”
Common Symptoms of a Failing TCM in Your Envoy XL:
- โ Harsh, delayed, or unpredictable gear shifts.
- โ Vehicle is stuck in “limp home” mode (usually 2nd or 3rd gear).
- โ Check Engine Light or Transmission Warning Light is illuminated.
- โ Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults are present.
- โ A sudden drop in fuel economy.
- โ Complete loss of communication with the module, preventing shifting.
The Direct-Fit Solution: A Pre-Programmed 2006 Envoy XL Transmission Module
Don’t let a faulty module sideline your vehicle. This T42 Transmission Control Module (part number 24235753) is the definitive solution. We take all the guesswork and dealership hassle out of the repair. Before we ship it, we program the module to your Envoy XL’s specific Vehicle Identification Number (VIN). This ensures it works seamlessly with your engine and transmission’s existing software, right out of the box.
Key Features & Benefits:
- โ VIN Programmed for Your SUV: Arrives ready for installation with the latest GM software updates for your specific 2006 Envoy XL. No expensive trip to the dealer is required.
- โ Restores Performance: Eliminates error codes and restores crisp, smooth shifting and proper torque converter lock-up, improving both drivability and fuel efficiency.
- โ OEM-Standard Quality: Built to meet or exceed original equipment specifications for long-lasting reliability and performance, backed by our one-year warranty.
- โ Broad Compatibility: This module is a direct replacement for a wide range of part numbers, including 24252114, 24234503, 24230461, 24234274, and 24235753.
Plug-and-Play Installation: No Dealer Visit Required
You can get this job done in your own driveway with basic tools in about 30 minutes. The 2006 Envoy XL Transmission Module is located in the engine compartment on the driver’s side (LH side).
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset the system.
- Locate the Module: Find the TCM in the left-hand (driver’s side) of the engine bay. It will have several large electrical connectors.
- Swap the Part: Carefully unplug the wiring harness connectors and unbolt the old module. Bolt the new module in its place and securely reconnect the harnesses.
- Final Steps: Reconnect the battery terminal. While the system often resets itself, it’s best practice to use a standard OBD2 scan tool to clear any stored transmission codes. Start the vehicle and take it for a test drive to confirm smooth shifting.