Question about Chevrolet TrailBlazer
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Posted on Jan 02, 2017
These codes are for the evaporative emission system.The 455 is the vent solenoid.The 455 is a large leak in the evap.system.The vent solenoid I would replace because they go bad and will not work because they are under the vehicle in the rear of the truck.There is a bulletin for these and the vent valve is installed in another spot.The number for the bulletin is 02-06-04-037E.You should also look for a broken or loose hose or pipe that might have came off.Specially if you ran over something.If none found it could just be the vent solenoid stuck in the venting position.Good luck.
Posted on Dec 01, 2009
SOURCE: 04 trailblazer cel has a
A large or gross leak in the EVAP System is not always a gas cap. Have to smoke test the system with an EVAP Smoke Machine & use a scan tool to test & actuate system components
Posted on Jun 30, 2011
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