My Sierra is having problems starting at lights and stuttering going up hills. Its basically when you give it gas or try to go up hills. It dies when it is starting at a light if you give it really any gas. It can limp around with barely any fuel pressure.

any suggestions?

The first thing I'd do is replace the fuel filter, Next thing is to replace the fuel pump. Most of the time the lines coming out of the tank are rusted through and you need to replace the sending unit.:eek: