i have a 2002 chevy blazer nothing out of the ordinary i was going to the gas staiton and as soon as i put it in park the "ses" light came on service engine soon.... and it had about an1/8th of a tank left i took it 8 blocks to orillieys and had it read it was the p0440 code gas cap i guess??? and when i cam out with the tool and cleared the code and tryed to start it it wouldnt start it will crank over and i can hear the fuel pump "buzz" so i believe it is workin idk PLEASE HELP this is my wifes blazer so we all know how this is going "shes kickin my ***"! lol thank u _blazer_