Restore Flawless Shifting in Your Sierra Denali
Is your 2015 or 2016 Sierra Denali experiencing frustrating and unpredictable transmission behavior? Harsh shifts, getting stuck in gear, or a flashing check engine light can point directly to a failing Transmission Control Module (TCM). This critical component is the brain of your transmission, and when it falters, it can cripple your truck’s performance and reliability. This replacement TCM, part number 24272004, is the definitive solution to get your premium truck operating as it should. We take the guesswork and dealership hassle out of the equation by programming the module specifically to your vehicle’s VIN before it ever leaves our facility. This ensures a seamless integration and restores the precise, smooth shifting you expect.
Common Symptoms of a Failing TCM
- ✔ Unpredictable or harsh gear changes, both upshifting and downshifting.
- ✔ The transmission seems to hunt for the correct gear or gets stuck in one gear (limp mode).
- ✔ A noticeable delay when shifting from Park into Drive or Reverse.
- ✔ Check Engine Light is illuminated with transmission-related Diagnostic Trouble Codes (DTCs) such as P0700, P0751, or U0101.
- ✔ Reduced fuel economy due to inefficient transmission operation.
A Tale from the Service Bay
We had a customer with a ’15 Sierra Denali 1500 that was a nightmare to drive in stop-and-go traffic. It would slam into gear from a stop and sometimes refuse to downshift when he needed to accelerate. He was convinced his transmission was shot and was looking at a multi-thousand dollar bill. After a quick scan, we found codes pointing to the TCM. We installed a VIN-programmed module, and the change was instantaneous. The truck shifted like it just rolled off the showroom floor. It’s a powerful reminder that sometimes the ‘brain,’ not the brawn, is the source of the problem, and having a correctly programmed 2015-2016 Sierra Denali TCM is non-negotiable.
Streamlined Installation Process
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical mishaps.
- Locate the TCM: On most Sierra models, you’ll find the TCM mounted on the LH core support, near the radiator.
- Disconnect and Remove: Carefully unplug the electrical connectors. Be gentle with the locking tabs. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed TCM in the same location and securely fasten the bolts. Reconnect the electrical harnesses until they click into place.
- Reconnect Power: Reattach the negative battery terminal. The vehicle may need to complete a brief relearn cycle, which typically involves a short drive. Since this unit is pre-programmed, no further flashing is required.
Is This the Right Part for Your Truck?
This module is a direct replacement for part numbers 24272004 and 24276411. It is specifically compatible with the following GM trucks and SUVs equipped with the 8-speed (M5U) or 6-speed (MW7) automatic transmissions as noted:
- 2015-2016 Cadillac Escalade / ESV (8-speed M5U)
- 2016 Chevrolet Camaro
- 2016 Cadillac CTS
- 2015-2016 GMC Sierra 1500 / Denali 1500 (8-speed M5U)
- 2015-2016 Chevrolet Silverado 1500 (8-speed M5U)
- 2015-2016 GMC Sierra 2500/3500 & Denali 2500/3500 (6-speed MW7)
- 2015-2016 Chevrolet Silverado 2500/3500 (6-speed MW7)
- 2015-2016 GMC Yukon / Yukon XL 1500 (8-speed M5U)
A properly functioning 2015-2016 Sierra Denali TCM is essential for your vehicle’s health. Don’t let a faulty module dictate your driving experience. By providing us with your VIN upon purchase, you receive a part that is ready for installation right out of the box, saving you time and money.
Frequently Asked Questions
Do I need to do any programming after I receive it?
No. We program the module to the VIN you provide before shipping. This means it is ready to be installed in your vehicle without the need for expensive scan tools or a trip to the dealership.
What is a VIN and where do I find it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your truck. You can find it on the driver’s side dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While a faulty TCM is a very common cause, this code can also be triggered by other transmission issues. Replacing the TCM often resolves the issue, especially if other specific transmission codes are present.
Is this a difficult part to install myself?
For someone with basic mechanical skills and tools, this is a straightforward installation. The primary challenge is accessing the module. Since our unit comes pre-programmed, the most complex part of the job is already done for you.
What happens if I don’t provide my VIN?
We cannot ship the module until we receive your vehicle’s VIN. The programming is essential for the part to function correctly in your specific vehicle. Please provide your VIN during checkout or message us immediately after your purchase to avoid delays.