How do I fix a leak at the quick connect and the control body outlet tube?

there has been a recall on some year cruz about coolant leaks. Check with NHSTA.gov to see if you are included. If not you will have to replace housing hoses and any plastic connections around thermostat housing that carry coolant.
Chevy Cruze Antifreeze or coolant leaks typically appear in the thermostat housing of affected vehicles, though it can also leak from the recovery tank house or the throttle body heater inlet pipe in cars with 1.8L engines

code PO455
EVAP Control System Large Leak Detected
Possible Causes:


Aftermarket EVAP hardware non-conforming to specifications Canister vent (CV) solenoid stuck open EVAP canister purge valve stuck closed, or canister damaged EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube disconnected or cracked, or canister is damaged Fuel filler cap missing, loose (not tightened) or the wrong part Loose fuel vapor hose/tube connections to EVAP components Purge sensor or FTP sensor is out of calibration or has failed I would say that your gas cap is a good place to start.

Don't replace the valve that is a bigger problem, do your really want another hole in your pipes NO perhaps when you connected the new clear tube you did not connect it securely enough buy a new kit about 10.00 and just replace the tubing. P/S drain your water supply before you do this though or it will leak everywhere remember your pipes still have pressure in them. Hope this helps

3.8L Engine (most common) Upper Intake Manifold To Remove:

1. Drain the cooling system.
2. Remove or disconnect the following:
   • Negative battery cable.
   • Fuel injector sight shield.
   • Air cleaner intake duct.
   • Right spark plug wires from the ignition control module and reposition.
3. Relieve the fuel pressure.
4. Remove or disconnect the following:
   • Fuel rail assembly.
   • Brake booster hose from the vacuum source manifold in the upper intake manifold.
   • Exhaust Gas Recirculation Valve (EGR) wiring harness heat shield nut, bolt and the EGR heat shield.
   • Throttle body support bracket upper bolt.
5. Disconnect the electrical connectors from the following:
   • EVAP purge solenoid
   • Throttle Position (T/P) sensor
   • Idle Air Control (IAC) valve
   • Manifold Absolute Pressure (MAP) sensor
   • Mass Air Flow (MAF) sensor
   • EVAP purge solenoid vacuum line from the throttle body.
   • Accelerator and the cruise control cables with the bracket from the throttle body.
6. Remove or disconnect the following:
   • Upper intake manifold bolts and stud.
   • Clean the upper intake manifold bolt threads.
7. Remove or disconnect the following:
   • Upper intake manifold by lifting the back of the intake and sliding the manifold forward from the throttle body support bracket.
   • Upper-to-lower intake manifold carrier gasket from the upper intake manifold.
8. If the upper intake manifold is being replaced, remove the following:
   • Throttle body assembly.
   • Manifold Absolute Pressure (MAP) sensor.
   • Positive Crankcase Ventilation (PCV) valve.
   • Vacuum source manifold.

Upper intake manifold bolt torque sequence (3.8L engine)

To Install:

1. If the manifold was replaced, install or connect the following:
   • Vacuum source manifold.
   • Positive Crankcase Ventilation (PCV) valve.
   • Manifold Absolute Pressure (MAP) sensor.
   • Throttle body assembly.
   • Upper-to-lower intake manifold carrier gasket to the upper intake manifold.
2. Carefully place the upper intake manifold onto the lower intake manifold. Ensure that the alignment pins in the upper intake manifold align with the holes in the lower intake manifold. NOTE: Apply thread lock compound, to the bolt threads before assembly.
   
3. Install or connect the following:
   • Upper intake manifold. Tighten the upper intake manifold bolts in sequence to 89 in lbs (10 Nm)
   • Accelerator and the cruise control cables with the bracket to the throttle body.
   • EVAP purge solenoid vacuum line to the throttle body.
4. Connect the electrical connectors to the following:
   • Mass Air Flow (MAF) sensor
   • Manifold Absolute Pressure (MAP) sensor
   • Idle Air Control (IAC) valve
   • Throttle Position (T/P) sensor
   • EVAP purge solenoid
5. Install or connect the following:
   • Throttle body upper support bracket bolt. Tighten the bolt to 89 in lbs (10 Nm)
   • EGR valve wiring harness heat shield, nut and the bolt. Tighten the nut and the bolt to 89 in lbs (10 Nm)
   • Brake booster hose to the vacuum source manifold.
   • Fuel rail assembly.
   • Right spark plug wires.
   • Air cleaner intake duct.
   • Fuel injector sight shield.
6. Connect the negative battery cable.
7. Fill the cooling system.
8. Inspect for fluid or vacuum leaks.

Lower Intake Manifold (W/O Supercharger) To Remove:

1. Remove or disconnect the following:
   • Upper intake manifold.
   • Generator brace.
   • Drive belt tensioner with the mounting bracket and the heater water bypass inlet pipe.
   • Exhaust gas recirculation EGR outlet pipe bolt from the lower intake manifold.
   • Radiator inlet hose from the water outlet housing.
   • ECT sensor electrical connector.
   • Right upper engine mount strut bracket.
   • Generator brace bracket bolts.
   • Generator brace bracket.
   • Lower intake manifold bolts.
   • Lower intake manifold.
   • Lower intake manifold seals.
   • Lower intake manifold gaskets.
2. If replacing the lower intake manifold, Remove or disconnect:
   • Water outlet housing bolt and stud
   • Water outlet housing
   • Gasket and the thermostat.
   • ECT sensor.
3. Inspect the flatness of inlet flanges.
4. Clean the intake manifold mating surfaces.
5. Clean the intake manifold bolts and bolt holes of adhesive compound.

To Install:

1. If removed, install the ECT sensor.
   • Tighten the ECT sensor to 18 ft. lbs. (25 Nm)
2. If removed, install the thermostat, the gasket, and the water outlet housing.
3. If removed, install the water outlet housing bolt and the stud.
   • Tighten the bolt and stud to 20 ft. lbs. (27 Nm)
4. Install or connect the following:
   • Lower intake manifold gaskets. NOTE: Apply sealer GM P/N 12346286 (Canadian P/N 10953472) or equivalent to the ends of the intake manifold seals.
     
   • Lower intake manifold seals.
   • Lower intake manifold.
   • Lower intake manifold bolts.
   NOTE: Apply thread lock compound GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the two hidden bolts and ensure they are installed.
   
5. Tighten the lower intake manifold bolts in sequence to 11 ft. lbs. (15 Nm)
   
   
6. Install or connect the following:
   • Generator brace bracket.
   • Generator brace bracket bolts. Tighten the bolts to 37 ft. lbs. (50 Nm)
   • Right upper engine mount strut bracket.
   • ECT sensor electrical connector.
   • Radiator inlet hose to the water outlet housing.
   • EGR outlet pipe to the lower intake manifold.
   • EGR outlet pipe bolt to the lower intake manifold. Tighten the bolt to 21 ft. lbs. (29 Nm)
   • Drive belt tensioner.
   • Generator brace.
   • Upper intake manifold.
7. Inspect for leaks.

Lower Intake Manifold (W/ Supercharger) To Remove:

1. Disconnect the negative battery cable.
2. Drain the cooling system.
3. Remove the supercharger.
4. Remove the thermostat housing.
5. Remove the EGR pipe at the intake manifold.
6. Disconnect the electrical connection at the temperature sensor.
7. Remove the intake manifold and gaskets.

NOTE: The coolant bypass tube will release from the intake manifold when the manifold is removed.
To Install:

1. Clean the gasket sealing surfaces.
2. Install the intake manifold gaskets.
3. Align the coolant bypass tube with the opening in the intake manifold and install the manifold. Tighten the bolts to 11 lb ft (15 Nm).
4. Install the electrical connector to the temperature sensor.
5. Install the EGR pipe to the intake manifold.
6. Install the thermostat housing.
7. Install the supercharger.
8. Fill the cooling system.
9. Connect the negative battery cable.

DTC P1455 - Substantial Leak or Blockage in Evaporative Emission Control System

The PCM monitors the complete EVAP control system for no purge flow, the presence of a large fuel vapor leak or multiple small fuel vapor leaks. The system failure occurs when no purge flow (attributed to fuel vapor blockages or restrictions), a large fuel vapor leak or multiple fuel vapor leaks are detected by the EVAP running loss monitor test with the engine running (but not at idle).

Check this possible causes:
After-market EVAP hardware (such as fuel filler cap) non-conforming to required specifications
Disconnected or cracked fuel EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube
EVAP canister purge valve stuck closed
Damaged EVAP canister
Damaged or missing fuel filler cap
Insufficient fuel filler cap installation
Loose fuel vapor hose/tube connections to EVAP system components
Blockages or restrictions in fuel vapor hoses/tubes (items also listed under disconnections or cracks)
Fuel vapor control valve tube assembly or fuel vapor vent valve assembly blocked
Canister vent (CV) solenoid stuck open
Mechanically inoperative fuel tank pressure (FTP) sensor


Check for audible vacuum noise or significant fuel odor in the engine compartment or near the EVAP canister and fuel tank

Tell us news.

Fig. 7 Fuel Lines At Fuel Pump Module NOTE: The fuel filter mounts to the frame above the rear of the fuel tank. The inlet and outlet tubes are permanently attached to the filter.
REMOVAL

1. Release fuel system pressure.
2. From inside trunk, disconnect fuel pump module wiring jumper from main body harness.

• The 4 pin connector is located under the trunk mat on the left side of trunk near the base of the shock tower.
• Locate body grommet for jumper near base of rear seat. Push grommet out and feed jumper completely through hole in body.

1. Remove fuel cap slowly to release tank pressure.
2. With vehicle on a hoist, drain fuel from tank. Support fuel tank with a support such as a transmission jack stand.
3. Position a fuel approved container, with a capacity of at least 16 gallons, under the drain plug located on the bottom left edge of the tank.
4. Remove drain plug and allow fuel to drain. WARNING: Drain plug must be installed at this time as there will be 1 to 2 gallons of fuel left in the tank .
5. When tank is no longer draining, install drain plug. Tighten plug to 32 in lb .
6. Remove driver's side fuel tank strap.

• Loosen, do not remove, passenger side fuel tank strap allowing fuel tank fill neck to touch rear suspension cross-member.

WARNING: Wrap shop towels around hoses to catch any gasoline spillage .

1. Disconnect fuel lines from fuel pump module Fig. 7 . These are quick connect fittings.
2. Disconnect fuel supply line from the fuel brake module.

Fig. 8 Fuel Filter

1. Remove fuel filter Fig. 8 .

NOTE: The fuel supply (to filter) tube, return tube (to pump module) are permanently attached to the fuel filter.

• The ends of the fuel supply and return tubes have different size quick-connect fittings.
• The larger quick-connect fitting connects to the large nipple (supply side) on the fuel pump module.
• The smaller quick-connect fitting attaches to the small nipple (return side) on the fuel pump module.

Apply a light coating of clean 30 weight engine oil to the fuel filter nipples. Install fuel tubes.

1. Install fuel tank, filter and tank straps. Torque tank strap bolts to 23 Nm (250 in lbs) . Make sure pump module harness grommet is installed in body as tank is raised into position.
2. Lower vehicle and connect pump module connector.
3. Fill tank with fuel.
4. Connect negative cable to auxiliary jumper terminal.

1. Disconnect the negative battery cable.
   
2. Remove the air cleaner outlet tube by loosening the retaining clamps, then tag and disconnect any hoses or tubes.
   
3. Disengage the engine control sensor wiring connector from the mass air flow sensor.
   
4. Remove the four retaining bolts, then carefully remove the sensor from the vehicle.
   
5. Discard the mass air flow gasket.
   

To install:

1. Position the mass air flow sensor with a new gasket onto the air cleaner cover.
   
2. Install the four retaining bolts, then tighten them to 25 inch lbs. (3 Nm).
   
3. Install the air cleaner outlet tube by aligning the white identification mark on the tube with the tube stop on the throttle body, then tighten the retaining clamps to 24-48 inch lbs. (2.7-5.4 Nm).
   
4. Engage the engine control sensor wiring connector to the mass air flow sensor.
   
5. Connect the negative battery cable, then start the engine and check for vacuum leaks.
   

The tubes are from the sun roof if you have one and they dont't need to send it out.

actually, the only way to fix this delicate piece of machinery is to replace the whole heater core unit. its the safe and best way. here are some step by step instructions on how to remove the old one. i also included instructions for installation of the new core as well. a fix ya rating would be most appreciated.


Remove the Old Core Step1 Drain the cars engine coolant from the water pump (remove the surge tank cap and drain bolt). Disconnect the heater outlet and inlet hoses by removing the clamps. Step2 Disconnect the Body Control Module. With the battery disconnected, parking brake on and transmission in Neutral, detach the entire front console, pull back the carpet to the right of the left dashboard support bracket and remove all the BCM's connectors and retainers. Step3 Pull back the carpet below the left dashboard support bracket. Remove the gas pedal from the front of the dash, then remove the center floor outlet ducts. Disconnect the main center floor duct from the heater/air conditioner module. Step4 Remove the heater core cover, from the HVAC module, sliding it away from the module locating pins and rearwards until the drain tube clears the dash front. Remove the heater core from the cover. Install the New Core Step1 Install the new heater core and reconnect the core cover. Use a new drain tube seal on the drain tube. Spray the core seal and dashmat with soapy water to make installing easier. Step2 Reattach the center floor ducts and the gas pedal. Install the Body Control Module and the front console. Step3 Connect the outlet and inlet hoses to the heater, replace the surge tank cap, fill the cooling system and connect the negative battery cable. Step4 Operate the cars engine until it reaches normal operating temperature. Watch over the climate control operation and check for any leaks.

Continuous Memory Diagnostic Trouble Code (DTC) P0442 indicates that a fuel vapor leak has been detected [as small as 0.10 cm (0.04 inch)] in the Evaporative Emission (EVAP) system.
Note: Prior to performing the following diagnosis inspect the Canister Vent Solenoid (CV) for contamination. A situation may exist where contamination holds open the Canister Vent (CV) solenoid enough to set DTC P0442 and also plugs the port to atmosphere enough to keep system from being vented quickly.

• After market parts and accessories nonconforming to the EVAP system specifications.
• Damaged, cross threaded or loosely installed fuel filler cap.
• Small holes or cuts in fuel vapor hoses/tubes (EVAP canister tube, EVAP canister outlet tube or EVAP return tube) in the EVAP system.
• Loose fuel vapor hose/tube connections to EVAP system components.
• EVAP system component [EVAP canister purge valve, fuel tank pressure (FTP) sensor, canister vent (CV) solenoid, fuel vapor control valve tube assembly or fuel vapor vent valve assembly] seals leaking.
• CV solenoid partially open when commanded closed.
• EVAP canister leaking.
• Check for presence of fuel filler cap.
• Verify that the CV solenoid is properly seated on the EVAP canister (if possible).
• Visually inspect for cut or loose connections to fuel vapor hoses/tubes in following locations:
  • EVAP canister to EVAP canister purge valve.
  • EVAP canister to fuel vapor vent valve assembly.
  • fuel vapor control valve tube assembly to fuel tank (if applicable).