Good afternoon! I wanted to see if anyone on here could help me out. I took my family on vacation last week in my '04 H2 to Orlando (about 7 hours one way). After returning home, the next day my truck would not fire right up. It would attempt to crank but never turn completely over. After a few tries it will fire right up. This has been happening for the last week. One minute it will fire right up. The next time I try it does not and I have to keep trying before it finally does. I'm getting a code P0342 (Ignition System or Engine Misfire) and can't really find any info on this site or another Hummer site about possible solutions. Any help would be appreciated.