Take to a dealership for inputting codes.
It is behind the light switch in the instrument panel.
Replace serpentine belt on Chevy avalanche?HOW
On the drivers side frame, directly under the driver's side seat on the frame rail,control module and abs pump.
The fuel pressure control on a 2003 Chevy Avalanche is part of the fuel pump module assembly located inside the fuel tank. It is not a separate component that can be easily accessed or replaced on its own. If there are fuel pressure issues, it may be necessary to replace the entire fuel pump module.
drop the pan and replace it
How do you replace the starter on 2002 chevy avalanch
Take your car to a Chevy Dealer
where is it at
I would replace the ignition control module that's in the distributor.
Where is the control module located on the 1983 Chevy blazer
The 2002 Chevy Avalanche does not have user replaceable radio bulbs. The radio needs to be dismantled by a qualified technician to replace the bulbs.