This truck has over 200000 on it. Installed new fuel pump and filter in when I purchased this truck used. Truck ran great for about 3 months when ignition coil tower cracked and truck would not start. Installed new coil and truck started right up but then started stumbling and died. Checked fuel pump pressure and seemed a little down from specs, so I installed a complete fuel pump assembly, with sending unit and new fuel pump sock. Same problem. Truck starts and run, stumbles and dies. It will start right back up and do the same thing. V6 4.3 Litre Vortec Thanks
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Installed new regulator and problem remains. Check engine light comes on with ignition on and goes out when engine starts.
hmm if it has spark and the fuel pressure is normal then it would be a bad crank sensor as always be sure to test it before you change it
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