yep, that's what I did - got the longest warranty. I also change the oil every 5K and don't worry about the engine.i would keep it. do a warranty... these are prices i have found for my '24 yukon...
Platinum 0 72/72 $1,731 Platinum 100 72/72 $1,562 Platinum 250 72/72 $1,427 Platinum 0 72/90 $2,272 Platinum 100 72/90 $2,021 Platinum 250 72/90 $1,820 Platinum 0 72/100 $2,601 Platinum 100 72/100 $2,301 Platinum 250 72/100 $2,061 Platinum 0 84/56 $1,606 Platinum 100 84/56 $1,456 Platinum 250 84/56 $1,335 Platinum 0 84/70 $1,940 Platinum 100 84/70 $1,740 Platinum 250 84/70 $1,580 Platinum 0 84/84 $2,329 Platinum 100 84/84 $2,070 Platinum 250 84/84 $1,862