Just purchased a 2003 Suburban on Monday. Since I don't know the vehicle's history, I'm assuming there is none. I've changed the oil, air filter, and tires. This morning, I did a "drain and fill" on the transmission. 3 quarts drained out. I replaced the fluid, drove around(getting up to highway speeds), came home and checked the fluid. Everything seems ok and the fluid is within the hash marks on the dipstick. Anyway, can anyone confirm 3 quarts is correct?...I never get a good feeling from those dipsticks. Thanks! BTW--It has 93k on it. I plan to drop the pan and replace the filter at 100k.