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Q: bright lights comes on when turn signals are used on 2004 Chevrolet Silverado 1500

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
code u1301 code u1064 code u1041 code c0291 code c0265 code c0267
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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The "U" codes are communications codes. Not uncommon. They are most likely related to what I'm about to tell you about the other codes since they involve the modules I am goign to tell you about. The "C" codes are an ABS issue. I can tell you with 99.9 percent certainty what the ABS issue is, and you will not like it. The EBCM (C0265, C0291 (and U Codes most likely)) and the BPMV (C0267) will need to be replaced and the ground wire for the EBCM will need to be re-located to a better area. I see an average of 2 of these a month on the trucks at the dealer I work at. The parts are roughly $1300, and i don't know what labor is in your area, but you can expect about 4 hours time. As far as the brights coming on during T-Sig operation, that is a different issue. Sounds like the multi-function switch in the column has gone bad, or you have a serious electrical feedback issue. Check your lighting grounds for good contact and CLEAN connections. If they are ok, replace the switch.
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