Ok its a 94 c2500 I have taken out the old pos 350 that was in it and replaced it with a new pos 5.3 and this a lil problem has turned its little heard. the brake lights stoped working the 3rd brake light works but nothing out of the other 2. park/turn/haz work of and the tag light is out now I have checked brakeswitch/relay all of that and determined that there wasnt any power going to the rear brake lights so i fixed that. now the real fun begans step on the brake and the lights work oh and now the tag light works now that I have fixed the no power to the brake lights problem. now with the pedal press the brake lights come on now here is the tricky bit with the brake pedel press and to use the left turn signal well the light just stays on might get one click out of it but that is it on the right it works. now back to the left side it only happens with the pedal pressed and the haz will flash until the brake is pressed. I hope I have made this bit clear as could be. any help will be great.