Could be the plug itself or your distributor cap.
Low compression in a cylinder, a burnt valve, loose plug or plug wire, bad injector, bad electronics.
Depends on why it is missing. First thing is to replace the spark plugs and plug wires. If it is still missing then run a compression test.
Did you also change spark plug wires ? It may also be a lose spark plug wire or coil pack...
you have backfire bacause you forgot to match wires with right cylinder
Yes it does have spark plugs....no it does not have wires, they have boots from cylinder 1-5 and a diff one for 6th cylinder
Sensor??? A misfire is usually caused by spark plugs and wires. After that you change distributor cap(if equipped) , fuel injectors, check for proper compression.
Yes, if the spark plug wires can be connected to the distributor and works.
you might check the coilpak
6
By any chance did you take all the spark plug wires off at the same time? Are you sure that you have the firing order correct? Did you get the plug wire connectors seated on the top of the spark plugs securely? You should feel a 'click' when removing the wires. Did you seat the plug wires in the distributor completely? If there is a gap, it can cause the cylinder to miss.
The 2004 Trailblazer does not have plug wires. It has a coil pack per cylinder that connects direct to the spark plugs.
Under the spark plug wires in the cylinder head, on top of the engine.