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Sierra 2500HD/3500HD Transmission.

We track 6 Sierra 2500HD/3500HD transmission parts from 3 brands, $89.99 to $479 as recorded 2026-09-11, each at its lowest price across the retailers we compare.

Pans, coolers, torque converters, and built transmission packages for towing and power.

6 parts

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2015-2016
Fluidyne Fluidyne Allison 1000 Transmission Line Kit For 2015-2016 Chevy/GMC 2500/3500 6.6L
$399
2011-2014
Fluidyne Fluidyne Bar Plate Transmission Cooler For 2011-2014 Chevy/GMC 2500/3500 Duramax
$459
2020-2024
Fluidyne Fluidyne Bar Plate Transmission Cooler For 2020-2024 Chevy/GMC 2500/3500 Duramax
$479
2017-2019
Mishimoto Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit
$99.95
2020-2026
Mishimoto Transmission Cooler, Silver, fits Chevrolet/GMC 6.6L Duramax L5P 2020+
$350.95
2017-2019
PPE PPE Transmission Fluid Thermal Bypass Valve, 2017-2019 L5P
$89.99
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The Aisin AS69RC Transmission Guide for Your High Output Ram Cummins

Gains shown are manufacturer claims, labeled community estimates, or independent tests, as tagged on each part. See the full catalog to filter by engine, drivetrain, and more.

Independent site. Not affiliated with, endorsed by, or sponsored by any vehicle manufacturer, parts manufacturer, or retailer named on this site. Vehicle and brand names are used only to describe compatibility. Gains shown are manufacturer claims, community estimates, or independent tests, labeled by source on every part, and are not guarantees.