GMC Repair: gmc yukon 2003, positive crankcase ventilation, fuel pressure regulator

Question
QUESTION: My yukon has 5.3 v8 engine.It was stalling at lights,so my
husband took it in and had it diagnosed.they said intake gasket was bad. he is trying to replace it himself and needs some type of visual pictures of the process. where can i find some

ANSWER: Hi
I would try the library or go to local dealership and ask for pic's from SI.
I cannot send pics out, sorry.
I can send you the proceduere from SI.... But I'll need year model.
Also have him check the Fuel pressure regulator for prescence of fuel.
Hope this helps
Pawl



---------- FOLLOW-UP ----------

QUESTION: thanks,the procedure would be great!! It is a 2003 Yukon
5.3 liter V8
Lenette

Answer
Intake Manifold Replacement
Removal Procedure
Important: The intake manifold, throttle body, fuel rail, and injectors may be removed as a complete assembly. If not servicing the individual components, remove the manifold as a complete assembly.
Remove the throttle body. Refer to Throttle Body Assembly Replacement in Engine Controls - 4.8L, 5.3L, and 6.0L.
Remove the fuel injectors. Refer to Fuel Injector Replacement in Engine Controls - 4.8L, 5.3L, and 6.0L.
Disconnect the following electrical connectors:
  -  The manifold absolute pressure (MAP) sensor (1)  

  -  The knock sensor (2)  

Remove the knock sensor harness electrical connector from the intake manifold.
Set the electrical harness aside.



If equipped with vacuum assisted brakes, remove the vacuum brake booster hose from the rear of the intake manifold.



Remove the positive crankcase ventilation (PCV) hose with valve.



Remove the MAP sensor (1) from the intake manifold.



Remove the evaporative emission (EVAP) purge solenoid vent tube by performing the following:
Remove the EVAP tube end from the solenoid (1).
Remove the EVAP tube end from the vapor pipe (2).




Remove the EVAP purge solenoid bolt (2), solenoid (3), and isolator (1) from the intake manifold.



Loosen the intake manifold bolts.
Remove the intake manifold.



Remove the intake manifold gaskets (1) from the intake manifold.
Discard the old intake manifold gaskets.
If required, clean and inspect the intake manifold. Refer to Intake Manifold Cleaning and Inspection .
Installation Procedure




Install NEW intake manifold gaskets (1) to the intake manifold.



Install the intake manifold.
Apply a 5 mm (0.20 in) band of threadlock GM P/N 12345382 (Canadian P/N 10953489), or equivalent to the threads of the intake manifold bolts.



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.

Tighten the intake manifold bolts.

Tighten

Tighten the bolts a first pass in sequence to 5 N·m (44 lb in).
Tighten the bolts a final pass in sequence to 10 N·m (89 lb in).




Install the EVAP purge solenoid (3), isolator (1), and bolt (2) to the intake manifold.

Tighten
Tighten the bolt to 10 N·m (89 lb in).





Install the EVAP purge solenoid vent tube to the solenoid (1) and vapor pipe (2).



Important: Lightly coat the MAP sensor seal with clean engine oil before installing.


Install the MAP sensor (1) to the intake manifold.



Install the PCV hose with valve.



If equipped with vacuum assisted brakes, install the vacuum brake booster hose to the rear of the intake manifold.
Route the electrical harness into position over the engine.



Connect the knock sensor harness electrical connector to the intake manifold.
Connect the following electrical connectors.
  -  The MAP sensor (1)  

  -  The knock sensor (2)  

Install the fuel injectors. Refer to Fuel Injector Replacement in Engine Controls - 4.8L, 5.3L, and 6.0L.
Install the throttle body. Refer to Throttle Body Assembly Replacement in Engine Controls - 4.8L, 5.3L, and 6.0L