The 1995 GMC 1500 is Fuel Injected and as such has no carburetor. Therefore there is nothing to adjust.
It's fuel injected, No carb.
They didn't have DRL's in 1995.
Simple answer is that it doesn't have one.
Need to know the engine size.
The 1500 holds 25 gallons.
Clockwise = close Counter-clockwise = open.
How much fuel gets introduced into the engine
at the evaporator in front of the radiator where the line compression fits together