can someone help me two codes i keep getting??

[yukon25008.1]

I keep getting a 171 and a 455 im sure one has to do with the exhaust leak, just figured one of you guys had a scanner or a chart that tells what they are.

Thanks

[txab]

I keep getting a 171 and a 455 im sure one has to do with the exhaust leak, just figured one of you guys had a scanner or a chart that tells what they are.

Thanks

 

 

You can look it up yourself.

 

http://www.gm-trucks.com/trouble-code-lookup/

[yukon25008.1]

Thanks man... big help