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Q: Engine misses on 2002 Chevrolet Avalanche 2500

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
My engine misses when it idle and when I drive it.So I tried changing the spark plus ,spark plug wires and the number 7 ignition coil still give me reading on number 7 cylinder when i check it with the diagnostic tool so I swap the coil 1 around with 7 and still get a reading it number 7
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check injector, or maybe poss wiring problem to injector or coil or even bad computer, or poss bad cyl, also do compression check
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