It is behind the light switch in the instrument panel.
Take to a dealership for inputting codes.
That year did not have a controll module.
On the drivers side frame, directly under the driver's side seat on the frame rail,control module and abs pump.
where is it at
Lost Communication with Transfer Case Control Module
2004 silverado, avalanche likly the same. I found mine cliped to a box behind the OBDII plug. cut tie wrap and pull it out. Thanks JJ
passenger side floor bord
drop the pan and replace it
Where is the control module located on the 1983 Chevy blazer
You have to remove the drivers seat and pull up the carpet.
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.
Just took it in to dealer for a 2003 Avalance 4WD. 3.5 hrs of work plus encoder module. $450.00