07 suburban--Everything erratic!! All warning lights on, A/C sometimes blows hot air, have trouble starting (engine cranks but doesn't completely start until 2 or 3 times, then sputters before starting.) Then runs great. HELP!! Have had 3 opinions--computers, ignition switch, fuel problem. Still under warranty.

 

Welcome to the forum. I'd get that beast to the service dept fast before the warranty runs out. Did you get it used and it just started doing this?