My brother has 65k on a newer Suburban that burns 2 quarts of oil to a 3000 mile oil change. He has no idea what to do next the dealership said it is part of the shut off cylinder approach.
He told me to hang on to my 350, more towing torque and no oil burning. Kind of scary for a Chevy Suburban fan. Buckfever1
Find another dealer, & have them start working through the TSB's: 07-06-01-007 = valve stems / cylinder heads, 05-06-01-019F = leaking rear main seal, and there are others relating to "excessive oil consumption". Mine is a 2007, and had a 5 year, 100K powertrain warranty. If your brother's is newer than mine, he should be good to go for getting it repaired.
FC
