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 Control System Overview


Object Number: 200517  Size: LF
(1)EVAP Vent Valve/Solenoid
(2)EVAP Vent Valve/Solenoid Ignition Feed Circuit Terminal
(3)EVAP Vent Valve/Solenoid Control Circuit Terminal
(4)EVAP Vent Valve/Solenoid Filter
(5)EVAP Vapor Lines
(6)Fuel Tank Pressure Sensor
(7)Fuel Tank Pressure Sensor Ground Circuit Terminal
(8)Fuel Tank Pressure Sensor Signal Circuit Terminal
(9)Fuel Tank Pressure Sensor Circuit 5 Volt Reference Circuit Terminal
(10)Fuel Filler Pipe
(11)Check Valve (Spitback)
(12)Modular Fuel Sender Assembly
(13)Fuel Limiter Vent Valve (FLVV)
(14)Pressure/Vacuum Relief Valve (Optional)
(15)EVAP Canister
(16)EVAP Canister Purge Valve/Solenoid Ignition Feed Circuit Terminal
(17)EVAP Canister Purge Valve/Solenoid Control Circuit Terminal
(18)Intake Manifold Vacuum Source
(19)EVAP Canister Purge Valve/Solenoid
(20)EVAP Service Port