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

Emission Hose Routing


Object Number: 155265  Size: SH
(1)To Vacuum Brake Booster
(2)To Accessory
(3)To EVAP Canister
(4)Throttle Body
(5)Fuel Pressure Regulator
(6)EVAP Canister Purge Solenoid Valve
(7)EVAP Service Port
(8)PCV Valve
(9)Intake Manifold
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