GlowShift GM Duramax Allison 1000 5/8" Transmission Line T-Fitting Adapter T-Fitting Allows You to Install your 1/8-27 NPT Temperature Sensor to the 5/8" Transmission Cooler Feed Line Recommended for GM Duramax Allison 1000 Transmissions Compatible with 2000-2013 Chevrolet Silverado & GMC Sierra Trucks Includes (1) T-Fitting Housing, (2) Compression Nuts & (4) Cutting Rings Installation Instructions, Free Lifetime Technical Support & One Year Limited Warranty