Hello everybody. I have a 08 silverado wt v-6. The center high mount stop lamp stays on from time to time. I replace the brake switch and the turn signal assembly. I was told that it had a chmsl relay, but when I went to the dealer they said it didn't have one. Now after doing the replacing of the parts the chmsl stays on all the time. So I disconnect from the lamp assembly. Have anybody experience this problem?