ive got a 1996 gmc sierra. its got the vortec 4.3 155000 miles. recently its been hard to start and once its running it doesnt run very good. ive replaced the plugs, wires, cap, rotor, ignition coil, fuel filter, and tps. it seemed to run good after i did all that. the next morning it wouldnt start again. any advice would be greatly appreciated
