code u1301 code u1064 code u1041 code c0291 code c0265 code c0267
bright lights comes on when turn signals are used on 2004 Chevrolet Silverado 1500
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.
all codes need to be properly diag,seek help from your mech