need to know the year.
That would be the 700R4
4L60E OR MAYBE A 700R4
mosty likely a 700r4 if it is a four speed
type of fluid for 5 speed manual transmission
4l60 or a 4l80
Atf iii (3)
4l60e
If it is an automatic transmission, Dexron III or Mercon are both acceptable.
All 1/2 tons / 1500 trucks used the 4L60E in them. From 1993 to date.
A lot depends on your location and the type of rebuild you're planning. In my area of the mid-atlantic states a stock rebuild from a transmission shop including installation would run about $1500.
4L60E Transmission
what type of transmission does a 2005 chevy tahoe have