Restore Your Truck’s Shifting Performance
Is your 2001-2005 Sierra or Silverado struggling with erratic shifting, getting stuck in gear, or throwing transmission codes? A faulty Transmission Control Module (TCM) can bring your hard-working truck to a grinding halt, costing you time and money. This direct-fit TCM is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN. It restores the crisp, reliable performance of your Allison transmission, getting you back on the road and back to work with confidence.
Common Symptoms & Your Solution
A failing TCM can manifest in several ways, often getting progressively worse. If you’re experiencing any of the following, this module is the solution you need:
- Harsh or delayed shifting between gears
- The transmission getting stuck in one gear (often called “limp mode”)
- A lit Check Engine Light with transmission-related Diagnostic Trouble Codes (DTCs), such as P0700, P0751, or U0101 (Lost Communication with TCM)
- Complete failure to shift or engage a gear
- Inaccurate or erratic speedometer readings
By replacing your old unit with this professionally programmed 2001-2005 Sierra 3500 transmission control module, you are directly addressing the electronic brain of your transmission. We flash it with the latest GM software updates using your VIN, ensuring it communicates perfectly with your truck’s engine and other systems right out of the box.
Features & Benefits
- โ VIN-Programmed for Your Truck: Arrives ready for a hassle-free installation. There’s no need for an expensive trip to the dealership for programming.
- โ Latest GM Software: We load the newest factory updates to ensure optimal shift patterns, fuel efficiency, and transmission longevity.
- โ Direct-Fit Replacement: Engineered to match the original factory unit (Part No. 15071240 and others) for a perfect fit on your 2001-2005 Sierra or Silverado HD.
- โ Restores Dependable Operation: Eliminates harsh shifts, gear hunting, and limp mode for the smooth, reliable performance your work truck demands.
- โ Cost-Effective Solution: A smart, reliable fix that saves you hundreds compared to dealership parts and labor costs.
- โ This unit is backed by our one-year replacement warranty.
An Expert’s Note on VIN Programming
“Many people don’t realize that a TCM isn’t a ‘one-size-fits-all’ part. On these GM trucks, the TCM must be specifically matched to the vehicle’s VIN. This process ensures the module has the correct software for your truck’s specific options, gear ratios, and tire size. Installing a non-programmed module will, at best, result in poor performance and, at worst, prevent the truck from starting or shifting at all. Our pre-programming service removes that entire headache, giving you a part that’s truly plug-and-play.”
Don’t let a faulty module dictate your truck’s reliability. This is the correct 2001-2005 Sierra 3500 transmission control module to fix your issues permanently. Simply provide your VIN during checkout, and we’ll handle the complex programming. Get your truck shifting like new again.
Frequently Asked Questions
Do I need to get this programmed by a dealer after I receive it?
No. This Transmission Control Module comes fully pre-programmed to your vehicle’s specific VIN before we ship it. It is ready for installation right out of the box, saving you a trip to the dealership.
How do I provide my Vehicle Identification Number (VIN)?
After you complete your purchase, you will receive instructions on where to send your VIN. For the fastest service, you can also add your 17-digit VIN to the ‘notes’ section during the checkout process.
Is this the correct part for my truck?
This TCM is a direct fit for 2001-2005 GMC Sierra 2500/3500 and Chevrolet Silverado 2500/3500 pickups equipped with the 5-speed Allison automatic transmission (RPO code M74). It replaces numerous service numbers, including 15071240, 15768288, and 29537441.
What happens if I continue driving with a bad TCM?
Continuing to operate your vehicle with a failing TCM can lead to more severe issues. Poor shifting can cause premature wear on internal transmission components like clutches and bands, potentially leading to a much more expensive mechanical failure down the road.
Where is the TCM located on my truck?
On the 2001-2005 GM HD trucks, the TCM is typically located on the driver’s side of the fan shroud in the engine bay. Always disconnect the vehicle’s battery before attempting to unplug or replace any electronic modules.