Product Description
The BD DIESEL 1061532 Cooler Bypass Delete eliminates the failure-prone factory cooler bypass valve from the Allison transmission found in 2017–2019 Chevrolet Silverado and GMC Sierra Duramax 6.6L trucks. The stock bypass valve can become jammed by debris, forcing the transmission into recirculation mode and causing higher fluid temperatures and reduced cooling efficiency.
This delete kit removes the OEM bypass valve and installs a robust bypass block that ensures consistent fluid flow through the transmission cooler. Keeping transmission temperatures lower improves overall transmission durability and reliability during towing, hauling, or heavy use.
Fitment
- 2017–2019 Chevrolet Silverado 2500 HD – Allison Transmission
- 2017–2019 Chevrolet Silverado 3500 HD – Allison Transmission
- 2017–2019 GMC Sierra 2500 HD – Allison Transmission
- 2017–2019 GMC Sierra 3500 HD – Allison Transmission
Fitment Note: Designed for models equipped with the Allison transmission cooler bypass valve; verify model and year before ordering.
Cross-Reference / Compatible BD DIESEL Products
- BD DIESEL 1061531 COOLER BYPASS DELETE – SILVERADO/SIERRA 1500 8L90 (2019–2023)
- BD DIESEL 1061530 COOLER BYPASS DELETE – GM 6L80 (2014–2018)
FAQ
What does the cooler bypass delete do?
It eliminates the transmission’s factory bypass valve, ensuring full fluid flow through the cooler and reducing transmission fluid temperature rise.
Why remove the bypass valve?
The OEM bypass valve can get jammed by debris, causing it to default to recirculation mode and limiting cooling performance — especially under load.
Is this legal to install on my truck?
Yes — this delete kit does not require emissions executive orders and is legal for use in all 50 states.
Specifications for BD DIESEL PRODUCTS 1061532
| Specification | Details |
|---|---|
| Brand | BD Diesel Performance |
| Part Number | 1061532 |
| UPC | 990011411431 |
| GTIN | 990011411431 |
| Shipping Info | Ships as a cooler bypass delete kit |
| Prop 65 | WARNING: Cancer & Reproductive Harm – www.P65Warnings.ca.gov |
