GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Vacuum Hose Routing


Object Number: 682209  Size: MF
(1)Air Control Valve
(2)AIR Vacuum Solenoid Valve
(3)Intake Manifold
(4)Fuel Pressure Regulator
(5)EVAP Purge Pipe to EVAP Canister
(6)EVAP Canister Purge Valve
(7)Throttle Body
(8)AIR Control Valve
(9)PCV Valve
Figure 2:

EVAP System Overview


Object Number: 678941  Size: LF
(1)EVAP Canister Purge Solenoid
(2)EVAP Canister
(3)Fuel Fill Neck/Fill Cap
(4)Rollover Valve/Fuel Tank Pressure (FTP) Sensor
(5)Fuel Tank
(6)EVAP Canister Vent Solenoid
(7)Vent Hose/Pipe
(8)EVAP Vapor Pipe
(9)EVAP Purge Pipe
(10)EVAP Service Port