Is this a 5.3 or 4.8

[jomo]

they had DBW before 03

I read on ls1tech that they did not go to DBW on the 5.3 until 2003. I don't know I'm just trying to learn. Another question how can I find out what year the engine is?

[bangbangskeetskeet]

I read on ls1tech that they did not go to DBW on the 5.3 until 2003. I don't know I'm just trying to learn. Another question how can I find out what year the engine is?

+1 I was always under the impression that DBW didn't start on the trucks till 03.
Simple way is the vin.