Assuming this is a CFI (Central Fuel Injection) system, all you need to do is remove the upper intake to expose the bank of fuel injectors (aka the "Spider"). You can replace the individual poppet that is At Fault. The injectors are available at your local auto parts store.
can i change 1 fuel injector on 4.3 6 cylinder silverado 2003.
a bad coil or plug to be safe change both
new injector
If the distributor cap, rotor, ignition wires and spark plugs check okay then I would suspect a faulty fuel injector.
Engine cylinder # 5 - misfire detected
Trouble code P0200 means: Injector Circuit
Did you gap the spark plugs before u inserted them into the block casue that can have a big effect.
Need to know the year, so we can answer correctly.
Random cylinder misfire
Vacuum leak, clogged/dirty fuel injector, bad spark plug/ wires.
It has a multi-point fuel injection system with one injector on each cylinder.
# 3 cylinder misfire.