The Diesel Techs Discount Codes & Offers

1 discount codeDetails

The Diesel Techs currently has one listed coupon code: Take this code along and try it when you check out

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THANKS WorkedTested 10 Nov 2026, 01:03 UTC−$31.95 saved · $3,199.95 cart · 5 items2020-2023 Duramax HD CAN Bus Plugs, 2017-2019 Duramax HD Transmission Tunes, 2010-2012 Cummins HD RACEME Ultra Tuners & Tunes, 2019-2021 Cummins HD MM3 Tunes ONLY, 2004.5-2007 Duramax HD MM3 Tunes ONLYView screenshot & cart

The Diesel Techs checkout with THANKS, tested 10 Nov 2026, 01:03 UTC

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Tested products
Product	Coupon discount	Total
2020-2023 Duramax HD CAN Bus Plugs1 × $149.99	−$1.49	$148.50
2017-2019 Duramax HD Transmission Tunes1 × $599.99	−$5.99	$594.00
2010-2012 Cummins HD RACEME Ultra Tuners & Tunes1 × $1,199.99	−$11.99	$1,188.00
2019-2021 Cummins HD MM3 Tunes ONLY1 × $649.99	−$6.49	$643.50
2004.5-2007 Duramax HD MM3 Tunes ONLY1 × $599.99	−$5.99	$594.00

Subtotal: $3,199.95
Coupon savings: −$31.95
Other savings: $0.00
Total before shipping & tax: $3,168.00

Frequently asked questions

Are there any The Diesel Techs discount codes or offers listed?

We currently list 1 offer for The Diesel Techs, including 1 coupon code. Check the individual offers for eligible items and requirements.

How do I use a discount code at The Diesel Techs?

Select “Show code”, copy the code, then follow the “Shop The Diesel Techs” link. Enter the code in the discount field at checkout and check that the saving appears before paying. Review the offer details if it doesn't apply to your basket.

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