P0449 P0455 codes on 07 Silverado Classic 4.3

[tonyghkbve]

I have two DTCs of P0449 and P0455 evap related codes. The truck doesnt have any obvious engine problems but since the gas cap was loose I tighthen and it went away. A few days later it came back. What could be the source of the trouble? My instict would tell me that P0449 would be a failed EVAP vent solenoid which need to be replaced. OTH if that part was replaced and the problem doesn't get fixed, then I have wasted money on a part that didn't fix the problem. If anyone got other ideas about this issue, please let me know.

[gmtech4]

this is a bulletin i found for you ,,,,enjoy !

 

#02-06-04-037J: Check Engine Light On, Fuel
Tank Hard to Fill, DTCs P0442, P0446, P0455 or P0449 Set (Replace Evaporative
Emission (EVAP) Vent Valve Sloenoid Assembly and Add/Relocate Filter Box Using
Service Kit) - (Mar 20, 2012)

Subject:
Check Engine Light On, Fuel Tank Hard to Fill,
DTCs P0442, P0446, P0455 or P0449 Set (Replace Evaporative Emission (EVAP) Vent
Valve Solenoid Assembly and Add/Relocate Filter Box Using Service Kit)

 

Models:
1999-2007 Chevrolet Silverado (Classic) Models

1999-2007 GMC Sierra (Classic) Models

2007-2010 Chevrolet Silverado Models (Including
Hybrid)

2007-2010 GMC Sierra Models (Including
Hybrid)

This bulletin is being revised to update the Parts Information.
Please discard Corporate Bulletin Number 02-06-04-037I (Section 06 –
Engine/Propulsion System).

Condition

Some customers may comment about the check engine light being illuminated.
They may also comment that their vehicle is difficult to fill with fuel or when
filling, the pump continuously shuts off before the tank is full.

When checking the vehicle for DTCs, the ECM may report one or more of the
following DTCs set as current or in history: P0442, P0446, P0449 or P0455.

Cause

The EVAP canister vent solenoid (CVS) valve draws fresh air into the system
through a vent.

Under certain operating conditions, dirt and dust intrusion into the EVAP CVS
fresh air intake/venting system, may result in restricted air flow.

Under certain operating conditions, water, if ingested into the EVAP CVS
fresh air intake/venting system, may reach the CVS valve causing corrosion in
the CVS valve, and may cause restrictions in the fresh air intake path, when the
valve is in the closed position.

Correction (1999-2007 Classic/Old Style
Models)

After following the published SI diagnostics and determining that the EVAP
canister vent valve is the cause of the MIL light, replace the existing EVAP
canister vent valve assembly with a new assembly. This new assembly is a sealed
unit that is designed to be vented through a remote filter box. To ensure
correct installation, follow the procedures below.

Important: DO NOT replace the EVAP canister assembly for this concern
unless it fails the leak test.

1999-2003 Model Year (Use Service
Kit P/N 19207762)

Important: The new canister vent valve will be installed in a new
location, outside of the frame.

2. Raise the vehicle. Suitably support the vehicle.
3. 
   
4. Disconnect the EVAP canister vent valve electrical
   connector, if equipped.
5. 
   
6. Disengage the two vent valve pipe clips securing the pipe to
   the underbody. Remove the clips from the underbody and discard.
7. 
   
8. Disconnect the vent valve pipe at the EVAP canister.
9. 
   
10. Remove and retain the EVAP canister vent valve bracket
    mounting bolt.
11. 
    
12. Remove the complete EVAP canister vent valve assembly with
    bracket attached and discard.
13. 
    
14. Position and secure the new valve assembly to the frame
    bracket on the outside of the frame using the existing hole and mounting
    bolt.
    Tighten
    Tighten the bracket mounting bolt to 12 Y (106 lb in).
15. 
    
16. Connect the vent valve pipe to the EVAP canister.
17. 
    
18. Install the two vent valve pipe clips into the existing
    underbody holes.
19. 
    
20. Connect the EVAP canister vent valve electrical connector, if equipped.
21. 
    
22. Attach bulk 5/8” heater hose to the vent valve port and secure using a
    clamp. Run a length as needed along the frame rail routing to the area above the
    transmission.
23. 
    
24. Cut the hose to determined length and install the supplied filter box.
    Secure using a clamp.
25. 
    
26. Remove the transmission support and lower the transmission assembly as
    necessary to allow for access to the new filter box location.
27. 
    
28. 
    
29. Secure the filter box to the transmission vent hose just forward of the hose
    tee-section using a tie strap. DO NOT pinch or restrict the transmission vent
    hose. The filter box opening should be pointing downward.
30. 
    
31. Raise the transmission and reinstall the transmission support.
32. 
    
33. Tie strap the hose as needed along the frame rail in order to keep the hose
    away from pinch-points and heat sources.
34. 
    
35. Lower the vehicle.

2004-2007 Model Year (Use Service Kit
P/N 19207763)

Crew Cab Short Box Shown Below, Other
Configurations Similar

Extended Cab Short Box Shown Below,
Other Configurations Similar

2. Raise the vehicle. Suitably support the vehicle.
3. 
   
4. Disconnect the EVAP canister vent valve electrical
   connector.
5. 
   
6. Disconnect the canister pipe from the vent valve.
7. 
   
8. Push in the retainer and remove the existing canister vent
   valve from the fuel tank clip or mounting bracket. Discard the old valve.
9. 
   
10. Cut back the existing canister pipe approximately 51 mm
    (2 in) to remove the quick connect end.
11. 
    
12. Install the new canister vent valve solenoid to the fuel
    tank clip or mounting bracket as shown above. The valve port closest to the
    electrical connector must point towards the canister.
13. 
    
14. Cut bulk 5/8” heater hose to a length of approximately 76 mm
    (3 in). Install the hose between the solenoid and the canister pipe and secure
    using clamps.
15. 
    
16. Attach bulk 5/8” heater hose to the vent port and secure
    using a clamp. Run a length as needed along the frame rail routing to the area
    above the transmission.
17. 
    
18. Cut the hose to determined length and install the supplied
    filter box. Secure using a clamp.
19. 
    
20. Remove the transmission support and lower the transmission assembly as
    necessary to allow for access to the new filter box location.
21. 
    
22. 
    
23. Secure the filter box to the transmission vent hose just forward of the hose
    tee-section using a tie strap. DO NOT pinch or restrict the transmission vent
    hose. The filter box opening should be pointing downward.
24. 
    
25. Raise the transmission and reinstall the transmission support.
26. 
    
27. Connect the EVAP canister vent valve electrical connector.
28. 
    
29. Tie strap the hose as needed along the frame rail in order to keep the hose
    away from pinch-points and heat sources.
30. 
    
31. Lower the vehicle.

Correction (2007-2010 New Style
Models)

After following the published SI diagnostics and determining that the EVAP
canister vent valve is the cause of the MIL light, replace the EVAP canister
vent valve assembly and relocate the remote filter box. To ensure correct
installation, follow the procedures below.

Important: DO NOT replace the EVAP canister assembly for this concern
unless it fails the leak test.

Use Service Kit P/N 19207763

2500 Crew Cab Short Box Shown Below,
Other Configurations Similar

1500 Extended Cab Short Box Shown
Below, Other Configurations Similar

2. Raise the vehicle. Suitably support the vehicle.
3. 
   
4. Disconnect the EVAP canister vent valve electrical
   connector.
5. 
   
6. Disconnect the vent valve pipe quick connect from the
   canister.
7. 
   
8. Either cut the existing valve vent pipe and leave the
   remaining section of pipe in the vehicle or remove along with the valve.
9. 
   
10. Push in the retainer and remove the existing canister vent
    valve from the fuel tank clip or mounting bracket.
11. 
    
12. Cut back the existing canister pipe approximately 51 mm
    (2 in) and retain the pipe for use with new valve.
13. 
    
14. Connect the canister pipe quick connect to the
    canister.
15. 
    
16. Install the new canister vent valve solenoid to the fuel
    tank clip or mounting bracket as shown above. The valve port closest to the
    electrical connector must point towards the canister.
17. 
    
18. Cut bulk 5/8” heater hose to a length of approximately 76 mm
    (3 in). Install the hose between the solenoid and the canister pipe and secure
    using clamps.
19. 
    
20. Attach bulk 5/8” heater hose to the vent port and secure using a clamp. Run
    a length as needed along the frame rail routing to the passenger side area above
    the transmission.
21. 
    
22. Cut the hose to determined length and install the supplied filter box.
    Secure using a clamp.
23. 
    
24. Remove the transmission heat shield, if necessary.
25. 
    
26. Remove the transmission support and lower the transmission assembly as
    necessary to allow for access to the new filter box location.
27. 
    
28. 
    
29. Secure the filter box to the transmission vent hose just forward of the hose
    tee-section using a tie strap. DO NOT pinch or restrict the transmission vent
    hose. The filter box opening should be pointing downward.
30. 
    
31. Raise the transmission and reinstall the transmission support.
32. 
    
33. Reinstall the transmission heat shield.
34. 
    
35. Connect the EVAP canister vent valve electrical connector.
36. 
    
37. Tie strap the hose as needed along the frame rail in order to keep the hose
    away from pinch-points and heat sources.
38. 
    
39. Lower the vehicle.

Parts Information

Part Number

Description

Qty

19207762 (1999-2003 Model Year)

Solenoid Kit, EVAP Emission Canister Vent Valve

1

19207763 (2004-2010 Model Year)

Solenoid Kit, EVAP Emission Canister Vent Valve

1

9438383 (5/8” X 25' roll)

Hose

Cut to Length

12337820

Tie-Strap

5

11609970

Clamp

2 (1999-2003)

or

4 (2004-2008)

Warranty Information

For vehicles repaired under warranty, use:

Labor Operation

Description

Labor Time

J7908*

Replace Evaporative Emission (EVAP) Vent Valve Solenoid Assembly and
Add/Relocate Filter Box Using Service Kit

1.1 hrs**

* This is a unique labor operation for bulletin use only. It will not be
published in the Labor Time Guide.

**Diagnosis time is included in this labor time.

[tonyghkbve]

the light went off on its own. The came back on. It has to be electrical problem. Any ideaS?

[txab]

Have you replaced the solenoid? It's pretty cheap.

[tonyghkbve]

No I haven't yet. Also should I need to, what is recommended? BWD brand or ACdelco.

[sonjaab]

Either brand will work.

The Delco unit #214-2149 and is around $25

Note that the dealer or parts guy will try and sell you the relocated valve kit thaT cost over $100.

So you must ask for a vent valve for a 08 suburban (for example because the pickup valve is only

shown in their parts book as the new modified location $100+ unit).

 

You will also need a piece of heater hose and 2 clamps. Because the factory hose is cheap and

sonic welded to the vent and connector so it can't be reused and you will have to cut it off.

 

Also note the new vent may not be the same shape as the factory vent and the holder it rests in

may need to be modified for the new vent to rest in it.

I used a couple of zip ties to secure everything.

 

I used the Delco unit and the installation was a EASY DIY fix !!!!!!!!!!!!!!!!!!!

[elite0259]

I ordered all the parts to do the solenoid and then the light went off, hasn't come back since.

[2006silveradochick]

My '06 silverado 5.3 ext cab 5.8 ft box was giving me the tighten gas cap message and threw out codes P0449 and P0455. After researching on here, I pretty much figured out it was the solenoid. Took it to the dealer since we just bought it a month ago. Of course, we were out of the 1 month warranty by a couple days when I took it in but the dealership checked it out under the warranty anyway. They told me it was the solenoid and it was $285 to fix. Thanks to you all and some posts on other forums, I told him I would pass on getting it fixed and went to O'Reilly's. I ordered the BWD part (took in the AC Delco part number 214-2149 and had them cross reference it). I also picked up 2 feet of 5/8 heater hose and a couple clamps. I was all set to get this done in my driveway and have it done by the time the hubby got home from work. Crawled under my truck and found out that the solenoid on my truck is located between the fuel tank and the frame. What a pain! Ended up taking it to a local shop and explaining the situation to the owner (I take all my vehicles there if it is something I can't fix myself). He said GM has a re-route kit for this. I told him what I learned from you all and the other sites and he said he could get it in today and he would do that for me. $50 later, my truck is fixed and no light! Total cost was about $82. Kind of bummed I had to take it in to be fixed because I really wanted to do it myself but I still saved over $200 from what the dealer wanted to fix it.

[gmtech4]

welcome to the site ,glad its fixed!!

[samcg]

Im getting the same codes, but in addition to the P0449 , P0455, I am getting P0101 and P0102. Any ideas where I might want to start troubleshooting?

[wca1959]

My '06 silverado 5.3 ext cab 5.8 ft box was giving me the tighten gas cap message and threw outcodes P0449 and P0455. After researching on here, I pretty much figured out it was the solenoid. Took it to the dealer since we just bought it a month ago. Of course, we were out of the 1 month warranty by a couple days when I took it in but the dealership checked it out under the warranty anyway. They told me it was the solenoid and it was $285 to fix. Thanks to you all and some posts on other forums, I told him I would pass on getting it fixed and went to O'Reilly's. I ordered the BWD part (took in the AC Delco part number 214-2149 and had them cross reference it). I also picked up 2 feet of 5/8 heater hose and a couple clamps. I was all set to get this done in my driveway and have it done by the time the hubby got home from work. Crawled under my truck and found out that the solenoid on my truck is located between the fuel tank and the frame. What a pain! Ended up taking it to a local shop and explaining the situation to the owner (I take all my vehicles there if it is something I can't fix myself). He said GM has a re-route kit for this. I told him what I learned from you all and the other sites and he said he could get it in today and he would do that for me. $50 later, my truck is fixed and no light! Total cost was about $82. Kind of bummed I had to take it in to be fixed because I really wanted to do it myself but I still saved over $200 from what the dealer wanted to fix it.

 

This was my exact problem. 14.00 Fuel cap, 32.00 Solenoid, 1 ft 5/8 heater hose, 2 clamps, 15 minuites. The light went out within 10 miles. ( Location of the solenoid was at the rear of the fuel tank )

[BacMan]

Having the same issues. I've had the truck in and out of the mechanic several times. Last trip in he stated everything that can be replaced has been replaced. If the the light comes back on you're going to have to replace the computer. Well three days later the light is back on. What do you guys think? Computer or is something being missed.

[tonyghkbve]

Update: i just replaced the evap purge solenoid with ACdelco part no. 214-2082 complete with filter box. Unfortunately, I was unable to determine the appropriate length of heater hose from solenoid to filter box at top of tranny so I bought a 10 foot heater hose. I routed it through the frame rail but was unable to reach the tranny so I had to shortened it and put it at the center support bearing for the driveshaft area. I hope my improvision is acceptable just like the tranny location. I cleared the code with a scan tool and filled the truck with gas which seems to be free flowing with no premature pump stops like before.

[TooTall1]

You wasted your money on the remote filter version. I did this back in May and used the old style single port version. Cost all of $25. Most important thing to remember is not to overfill your gas tank! Stop filling when the nozzle clicks off! Don't round up to an even amount or try to squeeze extra fuel in as this is the #1 cause of failures.

[gmtech4]

before GM did the relocate to the tranny (which is a crap location anyways),we brought the hose up the left frame and put the filter either beside the battery or under the master cylinder ,,,,that was rural Alberta and lts of dirt road driving ,,,,,i replaced azillion canisters and solinoids lol