I have a very good friend with an '03 Yukon. His gas gauge is all over the place. Will only indicate 1/2 tank when full and 1/4 when empty. In between those times it will irratically jump and dive. Is there a TSB or anything on the sender for this vehicle? It's about a 60 mile drive to the dealer for him, so he called me to ask if I could find out for him.

Any chance one of y'all be able to help me help a friend?

Thanks In Advance!

Jeff