2004 Tahoe 5.3L
CF Veteran
Joined: Mar 2011
Posts: 1,709
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Welcome to the forum.
P0049 and P0055 are undefined for your vehicle. If you actually read them out of your vehicle, consider a visit to the service department, preferably a Chevy dealership, to get the PCM checked. P0449 is an electrical problem with the EVAP vent control circuit whereas P0455 is a weak vacuum condition in the EVAP system.
P0049 and P0055 are undefined for your vehicle. If you actually read them out of your vehicle, consider a visit to the service department, preferably a Chevy dealership, to get the PCM checked. P0449 is an electrical problem with the EVAP vent control circuit whereas P0455 is a weak vacuum condition in the EVAP system.
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