Get Your Heavy-Duty Truck Shifting Like New
Is your Silverado or Sierra HD truck experiencing harsh shifting, getting stuck in gear, or throwing transmission-related codes? A failing Transmission Control Module (TCM) can bring your workhorse to a grinding halt, costing you time, money, and confidence. This is the definitive, hassle-free solution to restore your truck’s performance. We provide a professionally programmed 2001-2005 Sierra 3500 transmission control module, flashed with the latest official GM software and tailored specifically to your vehicle’s VIN. Get back the crisp, reliable shifting you depend on for towing, hauling, and daily driving.
Common Symptoms & Your Solution
If your truck is showing any of these signs, a faulty TCM is the likely culprit. This module is the direct solution for:
- Erratic or harsh shifting
- Delayed engagement into Drive or Reverse
- Transmission getting stuck in one gear (“limp mode”)
- Check Engine Light or Transmission Warning Light on
- Diagnostic Trouble Codes (DTCs) such as P0700, P0751, P0756, U0101
Installing this pre-programmed module resolves these issues by restoring proper communication and control over your Allison M74 transmission, ensuring your truck operates exactly as the factory intended.
Features & Benefits
- โ Programmed to Your VIN: This module arrives at your door ready for installation. No need for an expensive trip to the dealership for programmingโwe handle it all for you.
- โ Updated GM Software: We flash each unit with the newest updates from General Motors, which can correct factory bugs and improve overall transmission logic and performance.
- โ Restore Peak Performance: Eliminate shifting problems and regain the smooth, powerful operation your heavy-duty truck was built for.
- โ Direct-Fit Replacement: Engineered to be a perfect match for the original part, ensuring a straightforward installation process on the LH fan shroud. This is the correct 2001-2005 Sierra 3500 transmission control module for a perfect fit.
- โ Extensive Compatibility: Replaces a wide range of original service numbers, including 15768288, 15071240, 15163072, and many more, ensuring broad application coverage.
- โ Purchase with Confidence: This unit is backed by our one-year replacement warranty.
Expert Insight: The Allison Programming Difference
The Allison 1000 series transmission in your truck is a legendary piece of equipment, but its performance is entirely dependent on the TCM. Unlike simpler components, you can’t just swap in a used module from another truck. Each TCM is calibrated to the specific VIN, considering factors like axle ratio and tire size. Our VIN-programming service isn’t just a convenience; it’s a critical step to ensure perfect communication between your engine and transmission. This prevents future damage, optimizes shift points for fuel economy and power, and guarantees the longevity of your entire drivetrain. By installing a correctly programmed 2001-2005 Sierra 3500 transmission control module, you’re not just fixing a partโyou’re restoring the core reliability of your truck.
Frequently Asked Questions
Do I need to program this module after I receive it?
No. We program the module to the VIN you provide before we ship it. It will arrive ready for installation, with no additional programming required.
What information do you need from me?
After you complete your purchase, you will need to provide us with your truck’s 17-digit Vehicle Identification Number (VIN). This is essential for us to program the module correctly for your specific vehicle.
How do I know if this will fit my truck?
This module fits 2001-2005 GMC Sierra 2500/3500 and Chevrolet Silverado 2500/3500 pickups equipped with the 5-speed Allison automatic transmission (RPO code M74). Please verify your vehicle’s year and transmission option before ordering.
Where is the TCM located on my truck?
The Transmission Control Module is typically located on the driver’s side (LH) of the fan shroud in the engine bay for these specific models.
What are the most common signs of a failing TCM?
Common symptoms include the transmission going into limp mode, harsh or failed shifts, a lit check engine light with transmission-related codes, and delayed gear engagement.
What kind of warranty is included?
This unit is backed by our one-year replacement warranty, giving you confidence in your purchase.