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

Emission Hose Routing


Object Number: 520917  Size: SH
(1)To Rocker Arm Cover
(2)EVAP Service Port
(3)To EVAP Canister (At Rear of Vehicle)
(4)Air Intake Duct
(5)Throttle Body
(6)PCV Valve
(7)Fuel Pressure Regulator
(8)To Transaxle
(9)Intake Manifold
(10)To Accessory
(11)To Vacuum Brake Booster
(12)MAP Sensor
(13)EVAP Canister Purge Valve
Figure 2:

EVAP Control System Overview


Object Number: 468499  Size: MF
(1)EAVP 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)Modular Fuel Sender Assembly
(12)Fuel Limiter Vent Valve (FLVV)
(13)Pressure/Vacuum Relief Valve (Optional)
(14)EVAP Canister
(15)EVAP Canister Purge Valve/Solenoid Ignition Feed Circuit Terminal
(16)EVAP Canister Purge Valve/Solenoid Control Circuit Terminal
(17)Intake Manifold Vacuum Source
(18)EVAP Canister Purge Valve/Solenoid
(19)EVAP Service Port