I have an 05' H2 SUT with the supercharged 6 liter. I have the dash cluster issue with teh oil gauge and had an additional oil gauge installed to verify. However, on occassion (and not very often) I get a rattle that sounds like the lifters rattling. It happens when it just shifts or if you are turning up hill usually. The motor has about 65,000 miles on it. Anyone else have an issue similar to this or any ideas?