[Ironhorse]

Well after trading off our '99 Tahoe for the '05 in Dec. last year coming up on the first oil change for it according to the 'oil life' percentage. Has full synthetic oil in it and plan to stay with that, Quaker State 5W30 and a WIX 51042 filter. Reading thru the owner's manual says need to change within 600 miles of the "Change Oil" message coming on. Okay, fine, where does that message show? The book does not mention that. Is it on the digital speedometer readout or does it show on the dash elsewhere? Owner manuals sure get thicker every year with all the bells and whistles now days.