Free custom tuning
Worth $900, programmed for your VIN and included with your full bundle.
TCM TUNING 4 Credits AND UNLOCK/ CHEVROLET/GMC DURAMAX 6.6L 2017-2023
TCM TUNING 4 Credits AND UNLOCK/ CHEVROLET/GMC DURAMAX 6.6L 2017-2023
Regular price
$1,329.00
Sale price
$1,329.00
Regular price
Shipping calculated at checkout.
Included with your kit
-
Lifetime Tuning Adjustments
FREE $500 value -
Premium Lifetime Support
FREE $300 value
Product details
This pack includes TCM Tuning (4 Credits) and Unlock for CHEVROLET/GMC 2017–2023.
Duramax tuning, built in-house
Us vs. them
-
Best pricing
- Diesel Patriots
- Best pricing. In-house tuning keeps our costs down.
- Other providers
- Outrageous prices. Tunes bought from third parties.
-
Decades of experience
- Diesel Patriots
- Engineers with decades of experience, including work with Duramax.
- Other providers
- They have no clue who makes the tunes—they’re not the ones making them.
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Full support
- Diesel Patriots
- We stay with you until your truck is back on the road.
- Other providers
- Ghosted after placing your order.
-
Free changes
- Diesel Patriots
- Different tunes. Free adjustments.
- Other providers
- Extra charges may apply.
For custom tuning & tuning bundles. Other providers’ terms vary.
Know your kit
Questions, answered.
Fitment & ordering
Fitment
Fits 2017, 2018, 2019, 2020, 2021, 2022, and 2023 Chevrolet Silverado and GMC Sierra 2500HD & 3500HD models equipped with the 6.6L Duramax diesel engine. Compatible with all cab styles including Regular Cab, Double Cab, and Crew Cab — excluding Cab & Chassis configurations.
Your vehicle information
After your purchase, you will receive a form that you have to fill out with the necessary info of your truck, like VIN, make, and year. This way, we can custom you TCM Tuning File.
Shipping time
We process and ship all orders within 1-2 business days to all U.S. states. Once shipped, delivery typically takes 5-8 business days, depending on your location.
You will receive a confirmation email with a tracking number once your order has been dispatched. Please note that delivery times may vary slightly due to carrier schedules or external factors beyond our control.
Tuning & installation
WHO MAKES YOUR TUNES?
Our tunes are made in-house by people who have worked with Duramax. We build and support the tuning for your truck ourselves.
TCM tuning process
1- Receive your unlocked TCM
Once your unlocked T87/T93 TCM arrives, you’re ready to begin the setup process.
2- Scan your factory TCM
Use the VCM Scanner to scan your factory TCM. This step allows you to safely unhook it.
3- Replace the TCM
Remove your factory TCM and install the unlocked one in its place.
4- Verify the connection
Open the VCM Scanner again to confirm that the unlocked TCM is properly connected.
5- Read the unlocked TCM file
Use your HP Tuner to read (save) the unlocked TCM file.
6- Send us the file
Upload the file through the JotForm link we provide.
7- We create your custom TCM tune
Our team will build your custom TCM file based on your setup.
8- We send your tuned file back
You’ll receive your tuned TCM file by email once it’s ready.
9- Flash the new file
Use your HP Tuner to flash the new TCM file — the same way you would with an ECM tune.
Don't panic! We will send you detailed instructions. Plus, if you have any questions or get stuck during the installation, we've got you covered. Don't forget you have unlimited access to our professional tuning technicians.
Why Diesel Patriots
In-house value
We make our own tunes, keeping control of quality and cost.
Patriot-powered
Built around hardworking truck owners who expect power, durability and reliability.
More truck. Fewer repair bills.
See how emission-system costs can add up.
Illustrative costs · USD
- DPF cleaning
- $300
- DPF failure
- $4,000
- EGR
- $300
- SCR failure
- $5,000
- DEF sensors
- $1,500
- DEF fluid
- $5,000
Total of the examples shown
$16,100
