P0304 code and lights all over dash lit up

[Pistol850]

did u ever figure out ur issue i have same problems i have a 2008 tahoe was working fine all sudden engine light started blink car was loosn power misfiring . I checked light code says #4 misfiring i change spark plug wires , spark plugs and coil n injector for #4 i then reset code and its still sayn same code n nothing has changed any suggestion

Same here. Regret ever buying this pos

Track your wiring harness(es) for the coils and injectors and make sure they are tight, intact, corrosion free.....Any recent work on the rig?

I wish I could see the wire diagram to plug these fuel injectors in the right spot

 

[Tahoe14]

This post is a year old so you may or may not get a response. You could always start your own post.