Rockymoutain driver
New member
Dealer are being given say on when to have gear oil changed per chevy customer service rep. Mu local dealer is saying 30,000 and the next closest location says no later then 60,000. Oil is 70W and a dealer item only at $30.00 a quart. 2.5 quarts is what I am told but no dealer in Colorado as of 9/25/2012 had it in stock. I drained and changed mine and I am sending it to lab to be tested to find the best time to change. I will up date this soon.