Have a 2008 H2 that I bought in Nov. Having problem w/ Check Engine Light coming on quite regulary. Claims to be something w/ the Fuel Sending unit. Have been going down the Expressway to have the engine retard itself and not go over 2000rpm's and 35mph. Ended up getting towed to the shop. They couldn't find anything really wrong, finally said they found a wire w/a knick in it that supplied the relay for higher rpms???? Supposedly fixed it. Took it home and didn't have any problems, but about a month ago, ligh came back on and again test said fuel sending unit not properly reset?? Said I may experience power loss. Drove it and light goes off. Light is now coming on and then going off in a couple of days. Anyone else having this type of problem? Today it decided to retard itself again while driving. Made it to the side of the road and turned the car off and then restarted it and runs fine. Will be taking it into the shop tomorrow, but have a feeling I will get the same story "Can't find anything wrong" Curious if anyone else was having this type of problem.

 

When you say shop do you mean an actual shop or your dealer?

 

yes since its under warranty you should be taking everything to the hummer dealer as it will be free.

Also we don't know what your problem is yet, but it could be a similiar problem I had on one of my other hummers (non 08), you can view that thread here http://www.elcovaforums.com/forums/s...ad.php?t=31803

 

Sorry..when I said shop, I do mean dealer. Has anyone hear of this supposed bulletin that '08 H2's should be running 91 octane or higher? I don't get any knocking sounds from running the 87, but I posted this same question somewhere else and someone mentioned this....

 

I doubt 08's need premium fuel because even escalades only require 87 and they use the same engines

 

Alot of people, myself included, are running 08 h2's on 87 octane with no problems.