2000 Sliverado 1500 Z-71
# 1 Having trouble with cranking it's got 142,000 and it's a 2000 model it takes about three turns of the key before it cranks. The fuel pump was replaced over ten years ago and fuel filter was changed about two months ago so what could it be ? # 2 Replaced blend door on passenger and now only getting air where before was only getting hot heat now no cold or heat any help that could fix these problems would be a big help. Thanks

 

Welcome from Florida. Sounds like the check valve in the fuel pump assembly is bad. Over ten years for a fuel pump is a long time. I would change the fuel pump or add a check valve in the fuel line. But at over ten years, I think I would just change the pump.

 

Thanks old Chevy and i like your truck, That's what i had planed on doing but a buddy said he thought it was the starter so i just put it on hold but with your answer and what i thought from start that's what i will do replace fuel pump. ASAP Thanks maybe if i'm lucky i will find answer to my second problem from the Bow Tie Crew. Thanks Z-71 in Cobb County, GA Home of the Atlanta Braves.