2006 chevy avalanche 1500 4x2 im getting code 172 and 175 too rich fuel I just replaced the fuel pump. any thoughts on why the engine light/codes

 

why did you replace the pump?
Any cai installed?
is the vehicle flex fuel capable?

 

yes new pump, not sure wat cai is and not sure if flex fuel

 

-cold air intake

-ATTEMPT #2-WHY DID YOU REPLACE THE FUEL PUMP;what were you trying to fix by replacing the pump. did you install a flex fuel compatible pump in the vehicle

if the flex fuel sensor is askew, the vehicle will run rich; do a vin check in the tool section of this site