Have the Catalitict(SPelling off) convertor check.
A Chevrolet Dealership
look at old one and go from there,
This is warning you of a serious safety issue and needs to be checked by a knowlegable person immediately!
It is not very often that an ECM needs to be replaced. Generally they can be reprogrammed. Be sure of what and why you are doing what you are about to do. Guessing is very costly.
This does come with a factory amplifier for the sound system. Sometimes it comes disconnected and needs to be reattached.
Your battery has low voltage and needs recharged, check for loose battery cables, if the light stays on have your alternator checked.
The transmission fluid capacity of 2004 Chevrolet is 5 quarts. The fluid capacity needs to be checked before refilling in order to make sure there is no overfill as these are hard to remove.
This could very well run into a costly repair such as a blown head gasket if not corrected soon. The system needs to be checked for a coolant loss or a stuck thermostat. Also the cooling fans could possibly be defective.
I think you mights needs a 44" monkey wrench and a toggle piccost gadget thinggy. I thinks that might be the size of tools you prolly needs when chainjin breaks.
The 1995 Chevrolet Geo flashing amber engine light is an indication that the engine needs to be checked soon. A red flashing engine light is an indication the engine needs to be checked immediately.
It can be the dimmer switch. It needs to be checked out./ A test light will check for voltage.
Then it needs retuning.