I have a 1990 Chevy K1500 and sometimes while driving down the road my truck stalls and dies. So I have to pull over and prime the carburetor in order for the truck to start again. Now in the last 24 hours I have to prime the carburetor every time I start the truck. I hear the fuel pump when I turn the key to the on position and fuel comes all the way up to the carburetor. Any one have any idea what could be going on? Any help or suggestions would be greatly appreciated, thanks.

 

do you have a carb or TBI?