check engine light

first, find a new shop. evap code for the gas cap. air filter?? need more info on that one. coolant low may be from a 128 code but more likely the thermostat bad. the last one is the secondary air. it cannot be cleaned and must be replaced. Roy

what code are there in it

your thermastate probably isnt working properly the code that you are getting says low coolant , sencor or themastate it is the themastate its not getting up to its temp and yes i just replaced mine for the samething the thermastate is located behind the alternater on the drivers side that part cost around $50 you can do it youself if you have the knoledge but i took it to a shop . Do not take it to a gm garage or you will pay out your yig yang Good luck

fuel sensor module.