[MrWilliams]

I have a 12 chevy camaro RS/LS V6 with 180,000 miles here's what I'm having an issue with. Now this doesnt happen everyday but its happens when I come to a full stop at times. The stabilitrak lights will come on and idle rough pulling a p0305. Diagnose the issue I have a scanner and I get a u0401 symptom 71 and a p0305 which is saying I have a misfire on cyl 5. Here's the diagnose and changes

Alternator and battery change
Compression test on each cyl 155 com.
Change injector #5 and full tune up
Change throttle body
Smoke test (cigar trick)
Polish all ground points on chassis and engine
All 02 sensors
Checked pcm and module harnesses
Fuel pressure is 48-52 has fuel pump and high pressure fuel pump
Made sure no wires next to exhaust
Check fuses and relays

I haven't check wires individually because there are too many wires to go through or my pcm could be going bad but sometimes it idles right....I've searched everywhere online and hardly anyone comes back with an answer or right direction....man I'm stumped cant tell if stabilitrak is causing the misfire or 2 separate issues