Is Your Pontiac G5 Shifting Erratically?
Are you tired of harsh, unpredictable shifts, warning lights on the dash, or your Pontiac G5 getting stuck in gear? A failing Transmission Control Module (TCM) can turn a reliable daily driver into a source of constant stress. It disrupts communication between your engine and transmission, leading to poor performance, bad fuel economy, and potentially unsafe driving conditions. The solution is a reliable, correctly programmed replacement that restores your vehicle’s original function and your peace of mind.
Common Symptoms & Your Solution
This VIN-programmed T42 TCM is the definitive solution for a faulty original unit. If you’re experiencing any of the following issues, a failing module is the likely culprit:
- Harsh, delayed, or erratic gear changes
- The vehicle is stuck in “limp mode” (usually 2nd or 3rd gear)
- Check Engine Light or Transmission Warning Light is on
- Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related codes are present
- Complete failure to shift up or down
- A sudden drop in fuel efficiency
By replacing your old unit with our professionally programmed Pontiac G5 transmission control module, you directly address the electronic source of these problems, ensuring your transmission receives the correct commands for smooth, efficient operation.
Features & Benefits
- ✔ Plug-and-Play Installation: This module arrives pre-programmed to your vehicle’s specific VIN. This critical step ensures complete compatibility with your car’s systems right out of the box, eliminating the need for expensive programming at a dealership.
- ✔ Restored Performance: By managing shift points, torque converter lockup, and line pressure with precision, this TCM restores the smooth and responsive feel your vehicle had when it was new.
- ✔ Solve Annoying Warning Lights: A new, correctly functioning module will resolve the root cause of many transmission-related DTCs, allowing you to clear those persistent check engine lights for good.
- ✔ Built for Durability: Constructed to meet or exceed strict OEM standards, this module is designed to provide long-lasting, dependable service under all driving conditions.
- ✔ Warranty Protection: This unit is backed by our one-year replacement warranty.
Expert Insight: Why VIN Programming is Non-Negotiable
In modern vehicles, the TCM doesn’t just control the transmission—it communicates constantly with the Engine Control Module (ECM), Anti-lock Brake System (ABS), and other computers. Simply installing a generic, non-programmed module is a recipe for failure. Our VIN-specific programming loads your car’s unique factory software and calibrations onto the module before it ships. This ensures all vehicle systems work together seamlessly, just as the manufacturer intended. Installing a properly programmed Pontiac G5 transmission control module is the only way to guarantee a successful and lasting repair.
Frequently Asked Questions
Will this part need to be programmed by a dealer?
No. This Transmission Control Module is pre-programmed to your vehicle’s VIN before shipment. It is ready for installation upon arrival, saving you the time and expense of a dealership visit.
Is this part difficult to install?
For the Pontiac G5, the TCM is typically located on the driver’s side strut tower, making it relatively accessible. With basic hand tools, most DIY mechanics can complete the installation in under 30 minutes. We always recommend disconnecting the battery before starting the repair.
How do I know if my TCM is the problem?
Common signs include erratic shifting, the vehicle being stuck in one gear (limp mode), and specific diagnostic codes like P0700. If you are experiencing these symptoms, the TCM is a very likely cause. This Pontiac G5 transmission control module is designed to fix these exact issues.
What does a Transmission Control Module do?
The TCM acts as the brain for your automatic transmission. It uses data from various sensors to control exactly when the transmission shifts gears, ensuring optimal performance, fuel economy, and smoothness.
Does this part fit other vehicles besides the Pontiac G5?
Yes, this T42 TCM is compatible with a wide range of General Motors vehicles, including Chevrolet, GMC, Buick, and Saturn models. Please review the detailed fitment list on this page to confirm it is the correct part for your specific year, make, and model.