These sensors are Genuine Not a Counterfiet manufactured by Schrader Electronics in United Kingdom. They are made with high quality materials and components to strict Certificates Standards. All sensor fittings made from aluminum. Each sensor has Original marking Made by Schrader Electronics. Sensor Stem size standard. 452 Reading pressure range up to 148 psi. With this set you will always know the level of air in your trailer tires with this set of Chevrolet Accessories Trailer Tire Pressure Monitor (TPM) Sensors. Designed for use on Chevrolet Silverado and GMC Sierra Models with RPO (Regular Production Option) Codes PTT (Trailer Tire Pressure Monitor Sensors)or U1D (Advanced Trailering System), these TPM Sensors are synced to the vehicle Infotainment System and notify you when any of your trailer tires are low on pressure. Reading pressure range up to 148 psi. 1 Designed, Engineered, Tested and Backed by GM. 2 Genuine GM Accessories provide Factory Fit and Finish. 3 Monitors trailer tire pressure and informs driver when pressure levels are low. 4 Set of Four (4) Trailer Tire Pressure Monitor Sensors. 5 For Use on Models with RPO Code PTT or U1D. You will receive 4 sensors in a package same as in pictures above. They are new never used. The functionality and compatibility is unchanged (tire pressure and temperature). Make Model Year Trim. Chevrolet Silverado 1500 2020-25 High Country, LT, LT Tail Boss, LTZ, RST. 5.3L, 6.2L Gas. GMC Sierra 1500 2020-25 SLT, AT4, Denali. Chevrolet Silverado 2500 HD 2020-25 LT, LTZ, High Country. Chevrolet Silverado 3500 HD 2020-25 LT, LTZ, High Country. GMC Sierra 2500 HD 2020-25 SLT, AT4, Denali. GMC Sierrs 3500 HD 2020-25 SLT, AT4, Denali. Chevrolet Tahoe 2021-25 Z71, Premier, High Country. GMC Yukon 2021-25 SLT, AT4, Denali. We are dedicated to providing consumers the opportunity to benefit from amazing deals on: NEW, Overstock, Open-Box, and Refurbished products from Big company retailers and manufacturers. 100% genuine and guranteed. Every device is fully tested in great condition, cosmetically 9.8 out of 10 condition. There may be minor cosmetic wear such as minimal light scratches. Join the Airpods revolution with a discount price! If you have any questions, please send a message and ask! Our customer care team provides you with personal, expert-level support for each one of our devices and customers. Your physical address is required. Please allow us have more time to handle your case, and please trust us that we will provide the perfect solution for you. Purchasing from us is completely risk free. We are committed to providing genuine and high quality products to all our customers. 30 DAY return time on EVERYTHING we sell. So we can send return instructions. Front, Left, Rear, Right. Trailer Tire Pressure Monitor. Tire Pressure Monitoring Sensor.