RCP,
I have a 2500 '02 also, I used no oil for the 1st 6000 miles, then it started to use a quart every 1100, double that if
I pulled my 20 ft car hauler. I did the oil consumption test at the dealer, went every other Friday on the way home from work to have
them check it, add if low and record the level. GM's stance will be 1 quart be 100 gallons of fuel, which isnt much in these 2500's.
I complained via email at www.GM.com, they gave me a case number and I told them who I was working with at the dealer.
They finally agreed that it was using more oil than it should. I could 1. Get a new motor, with a 12 month/12000 mile warranty, after than
my extended would pick up another issues, or 2. they refund what I paid for extended warranty.
The new motor has about 3000 miles on it, close to due for its first oil change. This motor oil pressure at all RPM levels is one check mark
higher, than the old motor. It still sounds like a diesel for 20 seconds at startup, I dont have the crank pulley squeak on this one yet as I did
on the 1st motor also.
I just rolled 40000 on the odometer also. I was patient with the service guys, they will get to know your face, and expect to see you if you do
the consumption test again. Good Luck, try to email at the GM web site, you have to search a little but there is a avenue to voice your concerns regarding your
problems.
Troy