2004 chevy 1500 5.3 liter

Hi Glenn, did you by chance replace your PCM with a used computer? If so you will need to have it reflashed, If not sounds to me like the Passkey security needs to be relearned. Also wondering why you replaced PCM after replacing EGR valve, Please if you can give me some more info on your veh. Body control module controls security so something is not right. Please get back to me, Thanks Randy.

I’m happy to assist further over the phone at https://www.6ya.com/expert/randall_d932ef6e01588b0f

Pull each spark plug wire one at a time. Take out plug. Apply anti-sieze to threads and install new plug and wire.

should be by the crankshaft pulley front bottom of engine

Inlet should either come off of the water pump, If neither one does, Run to normal operating temp, turn on heat, and warmer of the two is your inlet.

There is a solenoid that open and closes with 12 volts, usually located close to the fuel filler tube area. This open to allow you to fill your tank, then closes after some inputs for the computer are satisfied, and then a pressure sensor verifies the system is working. First, make sure the cgas cap is tight, and if the light doesn't go away in a couple days of normal driving, get the solenoid checked.

you got to hold the oil change menu button down for atleast 5 secs to clear the computer and go to 0 percent oil life used

faulty coolant sensor .it will cause coolant fans not to come on.

Please check our motor oil. The symbol that looks like a transmission is actually suppose to be a little motor.

You probably just need to backflush your heater core. You can use a hose to flush it back and then forward. You'll be surprised at how much sludge and gunk will come out.

click on this link, and scroll down to 5.7L

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152800ba71e