2007 RT keep getting warning lights for gas cap and evap system, replaced with OEM Cap and checked all evap hoses still getting codes after 3 to 4 starts. have not smoke tested hoses, not to sure what else to inspect? any help would be appreciated.

 

Could be many things...leak, purge valve etc. You might want to research the ESIM. Evaporative System Integrity Module. Located on the charcoal canister. They seem to be prone to failure.