I think they consider it one of those lifetime fluid trannys Somebody should do it my dad had his done and not by the dealer and as far as flushing goes most tranny places anymore dont do them because they can damage the transmission. I would just get it changed and leave it at that

94 Rodeo 3+3 lift Red)
95.5 Rodeo 1" Body lift Dana 44' front & rear 4.88 gears 35"s 176,000 miles Optima Yellow top InexAir Co2
front winch bumper custom rear bumper, Hella 500's
2004 Silverado duramax