It doesn't have one.
The egr valve on the 1999 vortec v6 is bolted to the intake valve. It is just behind the distributor.
the vortec 4200 doesnt have an EGR system
if it is a 4.3l vortec it is on drivers side valve cover
how much torque for a Chevy Z71 350 vortec engine valve cover
98 chevy lddle control valve
If the engine in question is the 4.3l Vortec motor, the pcv valve is located on the driver's side valve cover, near the center. If it is the 2.2l motor, it is also located on the main valve cover, near the front of the cylinder head.
A vortec has bolts in the center of valve covers, instead of around the bottom edge
2003 4.3's do not have an egr valve.
On top of the air filter is a diagram that shows you where the PCV valve is located.
where is the canister purge valve located on a 03 chevy venture
Right in front of the engine below the throttle cable. It has two 10 MM bolts and an electrical plug.
From what I been reading there is no egr on this engine.