Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
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There are a couple of high failure areas ,here is info.
09-06-04-028B: MIL Illuminated, DTCs P0442, P0446, P0455 or P0449 Set Fuel Tank Hard to Fill, Corrosion/Water at EVAP CVS Valve ( Install CVS Valve/Filter) - (Oct 6, 2010)
This bulletin is being revised to update the Warranty Information. Please discard Corporate Bulletin Number 09-06-04-028A (Section 06 - Engine/Propulsion System).
This condition may be caused by water spray that is generated by the rear wheels. The EVAP CVS valve draws fresh air into the EVAP system around a mushroom cap covered opening in the conduit that is mounted near the top of the fuel filler pipe. Under certain operating conditions, the moisture is ingested into the fresh air intake conduit opening, and is carried down though the conduit to the EVAP CVS valve causing corrosion in the CVS valve, and restrictions in the fresh air intake path, when the valve is in the closed position.
The water also collects in the CVS valve cyclonic filter in order to protect the EVAP canister. However if the capacity of the cyclonic filter is exceeded, this may result in water entering the EVAP canister and cause an additional restriction during refueling.
Note: If the revised filter is already installed on the vehicle, refer to the appropriate DTC procedures in SI.
Important: Clean the EVAP line connections and surrounding areas prior to disconnecting, in order to avoid possible EVAP system contamination.
Note: Observe the proper orientation of the CVS valve filter (1) in the illustration.
Tighten Tighten the screws to 2.3 N·m (20 lb in).
Valve, EVAP EMIS CNSTR CONT
Filter, EVAP EMIS CNSTR VENT VLV
12368236 or Equivalent
Heater Hose 7.62 m (25 ft) Length, 19 mm (0.75 in) ID Roll
USD $24.49 (per 1.22 m (48 in) Length)
CAD $45.01 (per 1.22 m (48 in) Length
PIP3809C: SES Light - Inspect wire Harness For Short On Front Drive Shaft - (Feb 12, 2009)
This PI was superseded to update model years and DTCs. Please discard PIP3809B.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Some customers may complain of an intermittent crank no start, no crank, SES light, and/or security light. Upon inspection, the technician may find low fuel pressure and/or any of the following DTCs: P0030, P0036, P0050, P0053, P0054, P0056, P0059, P0060, P069E, P0102, P0113, P0118, P0131, P0132, P0135, P0137, P0140, P0141, P0161, P0230, P0335, P0341, P0151, P0152, P0155, P0157, P0158, P0161, P0171, P0172, P0174, P0175, P0449, P0452, P0532, P0641, P069E, P1133, P1153, P1682, P2101, P2534, and/or P2544.
If the SI diagnostics do not isolate a cause for this concern, inspect the wiring harness above the front drive shaft for a potential short to ground, near the transfer case side of the front drive shaft as shown below. Repair any chaffed wires by following SI repair procedures.
The harness should be secured to a supporting bracket with a plastic clinch style clip. If the harness has contacted the front drive shaft because of a missing retaining clip, secure the harness to the metal fuel line bracket with a tie strap to prevent a reoccurrence. If the retaining clip is present but contact still occurred, relocate the inboard clip (part of the wiring harness) and tie strap the harness to prevent a reoccurrence.
Here is an example of a harness that is too close:
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.