GM Allison Transmission Test Port Sensor Thread Extender Adapter

Diesel Auto Power’s GM Duramax Allison 1000 Transmission Test Port Adapter allows you to effortlessly install a 1/8-27 NPT temperature sensor to the test port of any 2000-2018 Chevrolet Silverado or GMC Sierra Duramax diesel truck. An O-ring is attached to the male thread of the adapter that prevents transmission fluid leaks at the test port connection.