P0496 and Won't Start after Getting Gas!! - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 4.2L I-6 Engine and Drivetrain > OEM Issues

OEM Issues Original Equipment Repairs and/or Problems

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  #1  
Old 12-07-2009, 02:36 PM
pikapp447 pikapp447 is offline
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2004 Buick Rainier
Silver 4.2L I6 2WD
Join Date: Oct 2006
Location: Olive Branch, MS
Posts: 10
P0496 and Won't Start after Getting Gas!!

Guys,
The past two times my wife has filled up with gas, the car has been extremely hard to start, requiring 20 seconds of cranking and finally putting her foot on the gas. It then runs erratically for the first minute or so. After that, it runs fine until time to put more fuel in it. Two mornings ago the CEL came on and Autozone pulled a code P0496. This has to do with the EVAP system. They cleared the code and it stayed off for 24 hours before coming back on. After several searches, I came across some threads talking about a PURGE VENT SOLENOID and a CANISTER VENT VALVE. I believe the canister vent valve is on top of the fuel tank, and the purge vent solenoid is attached to the driver's side of the motor. I would like to buy this locally, but RockAuto has AC Delco part #'s listed for each. Any part #'s from O'reilly's or Autozone would be helpful.

Post #4

http://forums.trailvoy.com/showthrea...lve+solen oid

Any help would be greatly appreciated, as I don't want to go replacing parts that are perfectly fine. Would anyone mind explaining how to bench test a solenoid to see if it is working or not?

Thanks,
Ryan
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  #2  
Old 12-07-2009, 02:58 PM
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the roadie the roadie is offline
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2004 GMC Envoy SLT "Roadiemobile"
Extreme Offroad Pewter 4.2L I6 4X4
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Quote:
Originally Posted by pikapp447 View Post
... how to bench test a solenoid to see if it is working or not?.
Jump 12V and ground to it and see if it clicks and operates.

If Rockauto can source AC Delco parts, other local places should be able to, like NAPA. Just call 'em.
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  #3  
Old 12-07-2009, 03:43 PM
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jusbarron jusbarron is offline
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2004 Chevy TrailBlazer LS
Lt. Tarnished Silver Met 4.2L I6 4X4
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NAPA Part Numbers:

Canister Purge Solenoid (2-28245)

Canister Vent Valve (2-28249)

We source AC-Delco from other vendors as well. Depends on the NAPA store as to whether or not they will do it though.
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  #4  
Old 12-08-2009, 11:37 PM
pikapp447 pikapp447 is offline
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2004 Buick Rainier
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Followup

Guys,
Replaced the canister vent solenoid that is located next to the motor on the driver's side and all is good. Filled the Rainier up and it started immediately afterwards. Interesting thing is that the factory part was a Delphi component, and the BWD (Borg Warner) and AC Delco part were exactly the same Delphi model number. This part obviously goes by many different names and part numbers.

Thanks for everyone's input!
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  #5  
Old 12-09-2009, 12:00 AM
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jusbarron jusbarron is offline
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2004 Chevy TrailBlazer LS
Lt. Tarnished Silver Met 4.2L I6 4X4
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It's actually not all that uncommon to see OE parts in aftermarket boxes. We see it pretty regular. I have opened many Echlin branded boxes and found everything from Bosch, Delco, Delphi and Motorcraft.
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  #6  
Old 01-23-2011, 10:50 PM
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jdleach1 jdleach1 is offline
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2006 Chevy TrailBlazer LS
Steel Gray Metallic 4.2L I6 4X4
Join Date: Jan 2010
Location: Mesa, AZ
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I am currently having this same problem. I am getting the P0496 code. Just to make sure I am replacing the right part...

On start up (morning) the engine sputters then alittle black smoke once the vacuum comes on then it runs fine.. This also happens at every fill.

My question is: Is the part I need to replace called the EVAP purge valve/control solenoid??? Is that also know as the Canister vent solenoid and the canister purge solenoid? I am reading all these post and I keep seeing different people using different terms here.. I just want to make sure I buy the right thing.. Any help would be helpful

Semper Fi
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  #7  
Old 01-25-2011, 10:20 AM
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jdleach1 jdleach1 is offline
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2006 Chevy TrailBlazer LS
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Quote:
Originally Posted by jdleach1 View Post
I am currently having this same problem. I am getting the P0496 code. Just to make sure I am replacing the right part...

On start up (morning) the engine sputters then alittle black smoke once the vacuum comes on then it runs fine.. This also happens at every fill.

My question is: Is the part I need to replace called the EVAP purge valve/control solenoid??? Is that also know as the Canister vent solenoid and the canister purge solenoid? I am reading all these post and I keep seeing different people using different terms here.. I just want to make sure I buy the right thing.. Any help would be helpful

Semper Fi
So I bought the Canister Purge Solenoid (2-28245) put the part on last night went and started the TB this morning and everything went well.. so far no check engine light so it looks like it may be fixed.. Just wanted to say Thank God for this web site it has saved me so much money and time....
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  #8  
Old 06-12-2011, 02:11 PM
wld87stang wld87stang is offline
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2008 GMC Envoy SLE
Black 4.2L I6 4X4
Join Date: Feb 2008
Location: Beantown
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So when you install new parts does the code clear right away or is there a time period it will clear the check engine light itself?????

I replaced the Valve in the Engine bay and Check engine Light is still on...

Thanks for all your info and Thanks in Advance for response..

George
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  #9  
Old 06-24-2012, 02:27 PM
drthunder drthunder is offline
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2006 Chevy TrailBlazer LS
Light Pewter Metallic 4.2L I6 4X4
Join Date: Jan 2009
Location: inez TX
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Purge solenoid valve worked for me

Purge solenoid valve worked for me. One of the posts here even gave part number and how to steps. Mine starts fine now after refuling.
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  #10  
Old 09-03-2012, 06:48 PM
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Valentine808s Valentine808s is offline
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2007 Chevy TrailBlazer LS
Dark Gray Metallic 4.2L I6 2WD
Join Date: Mar 2008
Location: Middletown PA
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help

Do anybody have pictures?
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