You open up the steering column and find it in there...
A Kenworth T600 can be purchased from a truck dealership and from Truck Paper, Truck Trader, Ranges Trucks and Accessories, Truck Sales, Ebay and Commercial Trucks.
It's 3 lbs, 12 ounces for the T660, and that's what it should be for the T600, as well.
right hand side of driver door
Peterbilt never made the T600. The T600 was built by Kenworth, and it ended production in 2007, at which point it was replaced in production by the T660.
It'll be in the vicinity of 11 gallons.
Between 16,000 and 18,000, depending on options. For example, the engine displacement will affect weight. If you get, say, a C12 or C13 Cat engine, it'll be lighter than the C15 or Cummins ISX. The transmission.. an 18 speed will have more weight, etc.
where is flasher location on 2008 t300 kenworth
The tallest point can be up to 13'6... typically, they'll be between 13'1 and 13'4 with a stand up sleeper.
Call a Kenworth dealership, give them the last six of the VIN. They should be able to tell you what it was keyed for from the factory - if it was re-keyed at any point, they won't know.
in the wiring harness
On the steering column.