The schrader valve on the low pressure side of the system.
On the 2007 Chevy, it is by the gas tank towards the middle of the box of the truck.
The 06 silverado 4.3 does not have a PCV valve.
Yes.
Ther is no PCV valve on a 06 silverado with a 4.3L engine
The PCV valve is found in the valve cover on the passenger side.
No there is not.
on the back of the gas tank
YOU WILL FIND IT MOUNTED ON A BRACKET UNDER THE TRUCK BY THE FUEL TANK
Drivers side valve cover towards the firewall.
It is stuck in a rubber hose and pushed in the top of the valve cover
Loosen the bleed valve