Is your workhorse truck letting you down with erratic shifting, warning lights, or getting stuck in gear?
A faulty Transmission Control Module (TCM) can bring your entire operation to a halt. For your 2001-2005 Sierra or Silverado 2500/3500, the transmission is the heart of its capability, and the TCM is its brain. When it fails, you lose the reliability you depend on. This isn’t just an inconvenience; it’s a threat to your productivity. Get back the crisp, predictable shifting you need with our direct-fit, VIN-programmed Sierra Silverado Allison TCM 15169834.
Common Symptoms of a Failing Allison TCM & Your Solution
If you’re experiencing any of the following issues, a failing TCM is the most likely cause. This module is the definitive solution for restoring your transmission’s electronic functions and getting you back on the road with confidence.
- Harsh or delayed shifting
- Slamming into gear from Park or Neutral
- Transmission getting stuck in one gear (Limp Mode)
- “Service Engine Soon” or Transmission-specific warning lights
- Diagnostic Trouble Codes (DTCs) such as P0700, P0751, P0756, U0101
- No communication with the TCM via a scan tool
Features & Benefits
- โ VIN-Programmed for Your Truck: No expensive trips to the dealer for flashing. This module arrives at your door pre-loaded with the latest GM software specific to your vehicle’s VIN. It’s a true plug-and-play solution that saves you time and hundreds of dollars.
- โ Restores Factory Performance: By using the newest GM updates, this TCM ensures your Allison transmission operates with optimal shift points, improved torque converter lockup, and enhanced durability, just as the engineers intended.
- โ Direct-Fit Replacement: Engineered to be a perfect match for the original unit. It mounts in the factory location (on the LH fan shroud) and uses the original connectors for a hassle-free installation.
- โ Comprehensive Compatibility: This single unit correctly replaces a wide range of original equipment service numbers, including 15768288, 15071240, 15169833, 15187103, and more, guaranteeing you get the right part.
- โ Built for Durability: Designed to withstand the harsh under-hood environment of a heavy-duty truck, ensuring long-term reliability for years of hard work.
- โ Peace of Mind Protection: This unit is backed by our one-year replacement warranty, giving you confidence in your purchase and your repair.
An Expert’s Note on Programming:
“In modern vehicles, especially hard-working trucks like these, modules need to communicate perfectly. A non-programmed TCM from a salvage yard is a recipe for disaster. It won’t have the correct software for your truck’s specific options, leading to persistent shifting problems or even a no-start condition. Our VIN-specific programming for this Sierra Silverado Allison TCM 15169834 ensures it integrates seamlessly with your truckโs Engine Control Module (ECM) and other systems, making it the only way to do the job right the first time.”
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
Absolutely not. We handle all the programming for you before we ship the part. Simply provide us with your vehicle’s 17-digit VIN during or after checkout, and the module will arrive ready for installation.
Where is the TCM located on my 2003 Silverado 2500?
On the 2001-2005 GM HD trucks with the Allison transmission, the TCM is typically located on the driver’s side of the engine bay, mounted directly to the fan shroud for cooling.
Is this a difficult part to install?
For someone with basic mechanical skills, this is a straightforward job. It involves disconnecting the battery, unplugging the electrical connectors from the old TCM, unbolting it from the fan shroud, and then installing the new one in the reverse order. No special tools are typically required.
How do I provide my VIN after I purchase?
You can add your VIN to the ‘notes’ section at checkout or reply to your order confirmation email with the information. We will not ship your order until we receive your VIN to ensure perfect programming.
Will this fix my transmission’s hard shifting problem?
While a faulty TCM is the most common cause of electronic shifting issues like harsh engagement or incorrect shifts, it’s essential to ensure your transmission fluid is at the correct level and in good condition. However, if you are experiencing the electronic symptoms listed above, this Sierra Silverado Allison TCM 15169834 is the most likely solution.
What if my original part number isn’t on your list?
The service numbers listed cover the vast majority of applications. If you are unsure, please contact us with your VIN before ordering, and our team will be happy to verify the correct fitment for your truck.