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2007 gmc sierra 1500 classic extended cab 4.3 v6

I’ve done a tune up, spark plugs wires cap anyway theres still a misfire on the number 5 cylinder the stats are as follows; P0305,P0102,P0128,P0200 can anybody give me some direction thank u in advance.

perform a compression test and report the numbers

perform a fuel injector balance test . . . this particular fuel injection system sometimes gets sticky injectors

But don’t throw more money at it, until you’ve done some more testing

Thank you for the information i will check compression