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P0455,p0449,p0442 Codes

chvy1

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chvy1 New Member

chvy1

Posted
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Does anyone know a solution to this problem? I have a 2006 Z71 5.3 V8 w/53,000 miles and every morning on my way to work I get a message "Tighten Gas Cap". The first two times I got this message I tightened the gas cap but it was already tight. Then my engine light came on and got these 3 codes (P0455,P0442,P0449). I called the dealer and they told me to replace the gas cap and this will solve my problem. Guess what it cleared up for a day. Now I still get the "Tighten Gas Cap" error in the morning and the code is P0455. I checked the lines and the purge valve. Everything looks good. I contacted the dealer again and they said for $300 they will drop the gas tank and change somekind of solenoid. I heard that there was a kit you can buy and this should solve the problem. Did anyone ever have this problem and can I change this myself to avoid the $300 dealer bill?

chvy1 New Member

chvy1

Posted
  • Author
Posted
Does anyone know a solution to this problem? I have a 2006 Z71 5.3 V8 w/53,000 miles and every morning on my way to work I get a message "Tighten Gas Cap". The first two times I got this message I tightened the gas cap but it was already tight. Then my engine light came on and got these 3 codes (P0455,P0442,P0449). I called the dealer and they told me to replace the gas cap and this will solve my problem. Guess what it cleared up for a day. Now I still get the "Tighten Gas Cap" error in the morning and the code is P0455. I checked the lines and the purge valve. Everything looks good. I contacted the dealer again and they said for $300 they will drop the gas tank and change somekind of solenoid. I heard that there was a kit you can buy and this should solve the problem. Did anyone ever have this problem and can I change this myself to avoid the $300 dealer bill?

 

 

Do you think I need to re run the vent hose on top of the tranny?

  • 8 months later...
jGrenade New Member

jGrenade

Posted
Posted
Does anyone know a solution to this problem? I have a 2006 Z71 5.3 V8 w/53,000 miles and every morning on my way to work I get a message "Tighten Gas Cap". The first two times I got this message I tightened the gas cap but it was already tight. Then my engine light came on and got these 3 codes (P0455,P0442,P0449). I called the dealer and they told me to replace the gas cap and this will solve my problem. Guess what it cleared up for a day. Now I still get the "Tighten Gas Cap" error in the morning and the code is P0455. I checked the lines and the purge valve. Everything looks good. I contacted the dealer again and they said for $300 they will drop the gas tank and change somekind of solenoid. I heard that there was a kit you can buy and this should solve the problem. Did anyone ever have this problem and can I change this myself to avoid the $300 dealer bill?

 

 

Do you think I need to re run the vent hose on top of the tranny?

 

 

I'm having the exact same problem, did you find a solution?

  • 4 months later...
jGrenade New Member

jGrenade

Posted
Posted
Does anyone know a solution to this problem? I have a 2006 Z71 5.3 V8 w/53,000 miles and every morning on my way to work I get a message "Tighten Gas Cap". The first two times I got this message I tightened the gas cap but it was already tight. Then my engine light came on and got these 3 codes (P0455,P0442,P0449). I called the dealer and they told me to replace the gas cap and this will solve my problem. Guess what it cleared up for a day. Now I still get the "Tighten Gas Cap" error in the morning and the code is P0455. I checked the lines and the purge valve. Everything looks good. I contacted the dealer again and they said for $300 they will drop the gas tank and change somekind of solenoid. I heard that there was a kit you can buy and this should solve the problem. Did anyone ever have this problem and can I change this myself to avoid the $300 dealer bill?

 

 

Do you think I need to re run the vent hose on top of the tranny?

 

 

I'm having the exact same problem, did you find a solution?

 

 

 

Ended up taking it to the dealer. They said the "evaporative e-valve" was burned up. Ended up costing me $900 bucks. Truck only had 36k miles.

Rudy35 Enthusiast

Rudy35

Posted
Posted

The dealerships are charging way too much. When I got the "tighten gas cap" code, it was the vent valve selonoid that was bad. GM wanted over a hundred bucks just in parts for the updated one so that the vent could be relocated above the transmission. I just went to RockAuto.com and bought the originial vent valve selonoid for $17. This fixed the code problem. My original valve lasted 5 years without the vent above the transmission, so for $17 I hope to get another 5 years. I also bought another $17 valve to have on the shelf for next time. Cheaper than what the dealership will charge!

desrtrat Senior Enthusiast

desrtrat

Posted
Posted
Does anyone know a solution to this problem? I have a 2006 Z71 5.3 V8 w/53,000 miles and every morning on my way to work I get a message "Tighten Gas Cap". The first two times I got this message I tightened the gas cap but it was already tight. Then my engine light came on and got these 3 codes (P0455,P0442,P0449). I called the dealer and they told me to replace the gas cap and this will solve my problem. Guess what it cleared up for a day. Now I still get the "Tighten Gas Cap" error in the morning and the code is P0455. I checked the lines and the purge valve. Everything looks good. I contacted the dealer again and they said for $300 they will drop the gas tank and change somekind of solenoid. I heard that there was a kit you can buy and this should solve the problem. Did anyone ever have this problem and can I change this myself to avoid the $300 dealer bill?

 

 

Do you think I need to re run the vent hose on top of the tranny?

 

 

I'm having the exact same problem, did you find a solution?

 

 

 

Ended up taking it to the dealer. They said the "evaporative e-valve" was burned up. Ended up costing me $900 bucks. Truck only had 36k miles.

 

i may be wrong but, that should of been covered under FEDERAL emission warranty 7yr/70k mi..

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