Thought I would try you guys before I jumped in with both feet .

2003 GMC Yukon with V8. The check engine light came on this morning so I went at lunch to my local AutoZone to get it checked. The guy checked the code and said it was P0171 ( fuel system lean ) . We went through a few things to check and I'm ready to go back to work. Fired the truck up , pulled out into traffic and head that away. I glanced down at my dash and noticed that none of the guages were working . No speedo , tach , gas , oil, temp : nothing. . I did check one fuse under the hood ( egn3 I think) and it was good. I haven't had time to do anymore checking so I thought I would post on here to see ifin any of you guys had had something similar happen and what was the fix.

Thanks,
Thereheis