Evaporative Emission Hoses/Pipes Replacement - Engine Chassis
Removal Procedure
- Disconnect the engine
purge pipe (1) from the chassis purge pipe (2).
- Cap the engine purge pipe in order to prevent possible contamination.
- Disconnect the chassis
fuel and EVAP pipe retainer (1) from the upper front of dash mounting stud
(3).
- Raise the vehicle. Refer
to
Lifting and Jacking the Vehicle
in General Information.
- Remove the exhaust intermediate pipe.
- Remove the driveline tunnel
closeout panel. Refer to
Floor Panel Tunnel Panel Reinforcement Replacement
in Propeller Shaft.
- Remove the EVAP canister
vent valve (2) from the bracket (1).
- Disconnect the rear purge
pipe (1) at the chassis purge pipe (3).
- Cap the rear purge pipe.
- Remove the chassis purge
pipe (4) rear underbody retainer nuts (3).
- Remove the chassis purge pipe (4) from the rear underbody retainers
(2).
- Disconnect the chassis purge pipe (4) from the side underbody
retainers (6).
- Remove the chassis purge pipe.
Installation Procedure
Caution: In order to reduce the risk of fire and personal injury observe the
following items:
• | Replace all nylon fuel pipes that are nicked, scratched or damaged
during installation, do not attempt to repair the sections of the nylon fuel
pipes |
• | Do not hammer directly on the fuel harness body clips when installing
new fuel pipes. Damage to the nylon pipes may result in a fuel leak. |
• | Always cover nylon vapor pipes with a wet towel before using a
torch near them. Also, never expose the vehicle to temperatures higher than
115°C (239°F) for more than one hour, or more than 90°C (194°F)
for any extended period. |
• | Apply a few drops of clean engine oil to the male pipe ends before
connecting fuel pipe fittings. This will ensure proper reconnection and prevent
a possible fuel leak. (During normal operation, the O-rings located in the
female connector will swell and may prevent proper reconnection if not lubricated.) |
Important:
• | Follow the same routing as the original pipe. |
• | Secure the pipe in order to prevent chafing. |
• | Do not kink or bend the pipe. |
- Install the chassis purge pipe (4) into the side underbody retainers
(6).
- Install the chassis purge pipe (4) into the rear underbody retainers
(2).
- Install the underbody retainers (2) on the mounting studs (1).
Notice: Use the correct fastener in the correct location. Replacement fasteners
must be the correct part number for that application. Fasteners requiring
replacement or fasteners requiring the use of thread locking compound or sealant
are identified in the service procedure. Do not use paints, lubricants, or
corrosion inhibitors on fasteners or fastener joint surfaces unless specified.
These coatings affect fastener torque and joint clamping force and may damage
the fastener. Use the correct tightening sequence and specifications when
installing fasteners in order to avoid damage to parts and systems.
- Install the chassis purge pipe (4) underbody retainer nuts (3).
Tighten
Tighten the EVAP pipe retainer bracket nuts to 6 N·m (53 lb in).
- Uncap the rear EVAP pipe.
- Connect the rear EVAP pipe (1) to the chassis purge pipe (3).
- Install the EVAP canister
vent valve (2) to the bracket (1).
- Install the driveline
tunnel closeout panel. Refer to
Floor Panel Tunnel Panel Reinforcement Replacement
in Propeller Shaft.
- Install the exhaust intermediate
pipe.
- Lower the vehicle.
- Uncap the engine purge pipe.
- Connect the chassis fuel
and EVAP pipe retainer (1) at the upper front of dash mounting stud
(3).
Tighten
Tighten the fuel and EVAP pipe bracket retainer nut to 6 N·m
(53 lb in).
- Connect the engine purge
pipe (1) to the chassis purge pipe (2).
Evaporative Emission Hoses/Pipes Replacement - Engine Chassis/Tank
Removal Procedure
- Raise the vehicle. Refer
to
Lifting and Jacking the Vehicle
in General Information.
- For vehicles equipped with an automatic transmission, remove the
right muffler . Refer to
Exhaust Muffler Replacement - Right Side
in Engine Exhaust.
- Remove the EVAP vent valve (2) from the bracket (1).
- Disconnect the rear EVAP
purge pipe (1) at the chassis EVAP purge pipe (3).
- Cap the chassis EVAP purge pipe.
- Remove the right rear
wheelhouse panel. Refer to
Wheelhouse Panel Replacement
in Body Rear End.
- Remove the EVAP canister access cover.
- Disconnect the EVAP purge
pipe at the canister.
- Remove the rear EVAP purge pipe.
Installation Procedure
Caution: In order to reduce the risk of fire and personal injury observe the
following items:
• | Replace all nylon fuel pipes that are nicked, scratched or damaged
during installation, do not attempt to repair the sections of the nylon fuel
pipes |
• | Do not hammer directly on the fuel harness body clips when installing
new fuel pipes. Damage to the nylon pipes may result in a fuel leak. |
• | Always cover nylon vapor pipes with a wet towel before using a
torch near them. Also, never expose the vehicle to temperatures higher than
115°C (239°F) for more than one hour, or more than 90°C (194°F)
for any extended period. |
• | Apply a few drops of clean engine oil to the male pipe ends before
connecting fuel pipe fittings. This will ensure proper reconnection and prevent
a possible fuel leak. (During normal operation, the O-rings located in the
female connector will swell and may prevent proper reconnection if not lubricated.) |
- Route the EVAP purge pipe through the right tunnel brace
opening.
- Connect the EVAP purge pipe to the canister.
- Remove the cap from the
chassis EVAP purge pipe.
- Connect the rear EVAP purge pipe (1) to the chassis EVAP purge
pipe (3).
- Install the EVAP vent
valve (2) to the bracket (1).
- For vehicles equipped with automatic transmission, install the
right muffler. Refer to
Exhaust Muffler Replacement - Right Side
in Engine Exhaust.
- Install the EVAP canister
access cover.
- Install the right rear wheelhouse panel. Refer to
Wheelhouse Panel Replacement
in Body Rear End.
- Lower the vehicle.
Evaporative Emission Hoses/Pipes Replacement - Engine Tank/Tank
Tool Required
J 34730-1A Fuel Pressure
Gauge
Removal Procedure
- Disconnect the negative
battery cable. Refer to
Battery Negative Cable Disconnection and Connection
in Engine Electrical.
- Relieve the fuel system pressure. Refer to the
Fuel Pressure Relief
.
- Drain the fuel tanks below the level of the fuel tank crossover
hose. Refer to
Fuel Tank Draining
.
- For vehicles equipped with automatic transmission, remove the
left and right muffler. Refer to
Exhaust Muffler Replacement - Right Side
, and to
Exhaust Muffler Replacement - Left Side
in Engine Exhaust.
- Disconnect the tank crossover hose (5) at the right fuel tank
and the left fuel tank.
- Disconnect the EVAP pipe (2) at the right tank EVAP pipe (3) and
the left tank EVAP pipe (1).
- Remove the rear EVAP pipe (2).
- Cap the open pipes in order to prevent possible contamination.
Installation Procedure
Notice: Replace the EVAP pipes and hoses with the original equipment or parts
that meet the GM specifications for those parts. The replacement EVAP pipe
must have the same type of fittings as the original pipe in order to ensure
the integrity of the connection. When replacing EVAP hoses, use only reinforced
fuel-resistant hose identified with the word Fluoroelastomer or GM 6163-M
on the hose. The inside hose diameter must match the outside pipe diameter.
Do not use rubber hose within 100 mm (4 in) of any part of the
exhaust system or within 254 mm (10 in) of the catalytic converter.
- Remove the caps from the pipes.
- Connect the EVAP pipe (2) at the right tank EVAP pipe (3) and
the left tank EVAP pipe (1).
- Connect the tank crossover hose (5) at the right fuel tank and
the left fuel tank.
- Push the clamp (4) outboard against the fuel tank, keeping the clamp
parallel with the white stripe on the tank crossover hose.
Tighten
Tighten the tank crossover hose clamps to 4 N·m (35 lb
in).
- Install the right and left muffler. Refer to
Exhaust Muffler Replacement - Right Side
and to
Exhaust Muffler Replacement - Left Side
in Engine Exhaust.
- Refill the fuel system.
- Tighten the fuel filler cap.
- Connect the negative battery cable. Refer to
Battery Negative Cable Disconnection and Connection
in Engine Electrical
- Use the following procedure in order to inspect for leaks:
9.1. | Turn the ignition switch ON, with the engine OFF for 2 seconds. |
9.2. | Turn the ignition switch OFF, for 10 seconds. |
9.3. | Turn the ignition switch ON, with the engine OFF. |
9.4. | Inspect for fuel leaks. |
- Program the transmitters. Refer to
Transmitter Programming
in Keyless Entry.
Evaporative Emission Hoses/Pipes Replacement - Engine Vent
Removal Procedure
- Raise the vehicle. Refer
to
Lifting and Jacking the Vehicle
in General Information.
- For vehicles equipped with automatic transmission, remove the
right muffler . Refer to
Exhaust Muffler Replacement - Right Side
in Engine Exhaust.
- Disconnect the vent hose (2) from the EVAP vent valve (1).
- Remove the clamp from the vent hose.
- Remove the right rear
wheelhouse panel. Refer to
Wheelhouse Panel Replacement
in Body Rear End.
- Remove the EVAP canister access cover.
- Disconnect the vent hose
from the EVAP canister.
- Remove the vent hose.
- Cap the EVAP vent valve and the EVAP canister in order to prevent
possible EVAP system contamination.
Installation Procedure
Caution: In order to reduce the risk of fire and personal injury observe the
following items:
• | Replace all nylon fuel pipes that are nicked, scratched or damaged
during installation, do not attempt to repair the sections of the nylon fuel
pipes |
• | Do not hammer directly on the fuel harness body clips when installing
new fuel pipes. Damage to the nylon pipes may result in a fuel leak. |
• | Always cover nylon vapor pipes with a wet towel before using a
torch near them. Also, never expose the vehicle to temperatures higher than
115°C (239°F) for more than one hour, or more than 90°C (194°F)
for any extended period. |
• | Apply a few drops of clean engine oil to the male pipe ends before
connecting fuel pipe fittings. This will ensure proper reconnection and prevent
a possible fuel leak. (During normal operation, the O-rings located in the
female connector will swell and may prevent proper reconnection if not lubricated.) |
- Remove the caps from the EVAP vent valve and the EVAP
canister.
- Route the vent hose over the floor panel tunnel panel rear brace.
- Install the clamps on the vent hose.
- Connect the vent hose to the EVAP canister.
- Connect the vent hose
(2) to the EVAP vent valve.
- For vehicles equipped with automatic transmission, install the
right muffler . Refer to
Exhaust Muffler Replacement - Right Side
in Engine Exhaust.
- Install the EVAP canister
access cover.
- Install the right rear wheelhouse panel. Refer to
Wheelhouse Panel Replacement
in Body Rear End.
- Lower the vehicle.