Restore Your Truck’s Flawless Shifting Performance
Is your powerful Sierra Denali, Silverado, or Camaro suddenly plagued by harsh shifting, hesitation, or a concerning “Service Transmission” light on the dash? A faulty Transmission Control Module (TCM) can cripple your vehicle’s performance, turning a confident driving experience into a source of constant frustration. This genuine GM TCM, service number 24289415, is the definitive solution. We take the guesswork and dealership hassle out of the equation by pre-programming it specifically to your vehicle’s VIN before it ships. This ensures a seamless installation and restores the crisp, intelligent shifting you expect from your high-performance vehicle.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a failing TCM is the most likely culprit. This module is designed to resolve these problems directly:
- Harsh, erratic, or delayed shifting
- Transmission getting stuck in one gear (limp mode)
- “Service Transmission” or Check Engine light illumination
- Loss of communication with the transmission module (DTC U-codes)
- Inaccurate gear display on the instrument cluster
By replacing your old unit with this professionally programmed module, you are not just buying a part; you are investing in a reliable fix that restores your truck’s core functionality and your peace of mind on the road. This is the ideal 2019-2020 Sierra Denali 1500 Programmed TCM for owners who demand a correct and lasting repair.
Features & Benefits
- ✔ VIN-Programmed for You: Arrives ready for installation with the latest GM software updates, matched perfectly to your truck. No expensive trips to the dealer for programming are required.
- ✔ Restore OEM Performance: Eliminates erratic shifting and error codes, returning your transmission’s operation to factory specifications for smooth power delivery.
- ✔ Genuine GM Component: Guarantees perfect fitment, communication, and long-term reliability for a wide range of GM trucks and performance cars.
- ✔ Cost-Effective Solution: Get a fully programmed module delivered to your door, saving you significant time and money compared to traditional dealership repair costs.
- ✔ This unit is backed by our one-year replacement warranty.
An Expert’s Note on Modern Transmissions: The 8 and 10-speed transmissions in these modern GM trucks are incredibly complex. The TCM is the brain, making hundreds of calculations per second. Unlike older vehicles, you can’t simply swap a module from another truck. Each 2019-2020 Sierra Denali 1500 Programmed TCM must have software that precisely matches the vehicle’s VIN, including its specific options and calibrations. Our VIN-matching service ensures this critical step is done correctly, preventing further transmission issues and ensuring your vehicle operates exactly as its engineers intended.
Don’t let a faulty module compromise the capability and refinement of your truck. This pre-flashed 2019-2020 Sierra Denali 1500 Programmed TCM is the most reliable and straightforward way to get back to business. After placing your order, simply provide us with your VIN, and we’ll handle the rest, shipping you a part that’s truly ready to install.
Frequently Asked Questions
Do I need to program this TCM after I receive it?
No. The main benefit of our service is that we program the module to your specific vehicle’s VIN before we ship it. It arrives ready for installation, requiring no further programming.
Where do I provide my vehicle’s VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We will provide clear instructions on how to do this. We cannot ship the part until we have programmed it with your VIN.
Is this a genuine, factory-spec part?
Yes, this is a genuine GM component (service no. 24289415 and compatible numbers) loaded with the latest official GM software. This ensures perfect compatibility and long-term reliability.
What are the most common signs of a failing TCM?
The most common symptoms include harsh or erratic shifting, the transmission getting stuck in a single gear, a “Service Transmission” warning light, and communication-related diagnostic trouble codes (DTCs).
Will this fit models other than the Sierra Denali 1500?
Absolutely. This TCM fits a wide range of GM vehicles, including the Silverado 1500/2500/3500, Sierra 1500/2500/3500, and even the Camaro from various model years. Please check the detailed fitment list on this page to confirm compatibility.
What is the warranty on this part?
This unit is backed by our one-year replacement warranty, giving you confidence in your purchase.