Hi Mark
My wifes truck is a 03,it has the push button 4x4.
No clunks when it starts.
Warned you about the 6.0 gas pig,how is it compared the the gas plow truck you had for a while?Wasn't it a 6.0 as well?
My wife just used hers to do a "town run". Town is 100 miles away,we don't have any stores where we live except for a liquor store.So it's 200 highway miles and a few hours of running around town.$86.00 gas to fill it,which is 62.4 liters which is 16.5 US gals@5.21 a gal.
When i do the same trip it's $100 +.I'm thinking of looking into some kind of chip or programer to try and get it up some.It's paid for and have a parts truck so she will have it for a while,she refuses to drive the diesel.
Back to the clunk,have you had the trany serviced to look for trash?We had a older 4x4 with a 700 in it that clunked,one day i backed up and that was it,no monument forward or back.
Hope it's not serious,sounds like the boat is going to suck up a few $$$.
Good Luck
Thomas
90 Chev 3500 c/c 4x4,6.2na,400 auto,4:10 gears.DSG Timing gears,main girdle, isspro tach, pyro,boost,oil and trany temp.Dual Tstats, High volume peninsular pump,on shelf, Custom turbo and intercooler 85%complete. Change of plans for the dually, it's going to get a Cummins. Both trucks are Blue 90 4x4 crews