to much fuel pressure
If your check engine light is not on and you're not having any drivability problems it's normal. My '93 Chevy Caprice did that from day one. I bought it brand new. HTH. -Jim
The check engine light is on..
Ah, ok then. Probably the vent valve for the gas tank is malfunctioning. Have the computer scanned and post the code(s). Advance and Autozone auto parts stores will do it for free. Are you also having trouble at the gas pump? Does the pump keep shutting off before the tank is full? That's another indicator that the vent valve is malfunctioning. HTH. -Jim
Looking for a Used Silverado 1500 in your area?
CarGurus has 150,210 nationwide Silverado 1500 listings starting at $1,259.
Search Chevrolet Silverado 1500 Questions
Chevrolet Silverado 1500 Experts