The radio on a 2003 Chevy Impala can be typically be fixed by replacing the fuse. If the radio does not work when powered, it will need to be replaced with a new unit.
The 2003 Impala has a 17 gallon fuel tank
2003
The heater core is leaking coolant. Replacing the heater core in that vehicle is a fairly complicated job. If you are considering replacing it yourself, purchase a shop manual for that vehicle, you will need it.
check with your Chevy dealer on that.
Fix a "door ajar" on Chevy Impala 2003 . Still on doors closed.
In the fuel tank
antifreeze lines
i need a step by step instruction on how to remove or replace a radiator of a 2005 3.4L chevy impala
You may be low on coolant or there is an air pocket trapped in the system, also be sure the radiator cap is good.
how do you replace a transmission pressure control solenoid in a 2003 chevrolet impala
Check with your local Chevy dealer on that.