CarBole High Performace Fuel Pump Module Fits 1999~2003 Chevy Silverado, GMC E3501M 1. OEM: E3501M . 2. Brand: CarBole 3. Fit for 1999~2003 Chevrolet Silverado, GMC . 4. The pump does not have the smog stuff on it , very noticeable gains in both horsepower and fuel efficiency. 5. Upgraded convoluted tubing improves durability to resist tube wear failure. Superior, heavy gauge wire reduces risk of electrical failure.