2002 H1 Hummer it started with a crank sensor code on the home was getting injector sensor codes got home next started it injector code again tried again no codes ran fine parked it out side went to put it back in garage hard start got in the garage next ran fine again drove it around the block all good drove for maybe 10 miles all good next day drove it 5 miles crank sensor codes the injector codes again made home. I did try switching aug. tank to main tank replaced fuel filter didn't see any problems with fuel.