I bought 2 of these ABS sensors for my 2001 Silverado 4x4. I picked up the truck in January 2020 and the ABS light has been on since I received it. I assumed it was the module/pump but the ABS fuse was pulled out of my truck and when I plugged it back in the ABS started blowing at 2-10mph. I knew it was the sensor or both. After removing the old sensors, cleaning the steering knuckle a bit and installing new sensors, the ABS problem was of course solved. Tamkken appears to be one of two aftermarket brands. Sensors that actually fix ABS problems in GM vehicles.