The trouble code should go away after you put in a new bulb. If not you may want to invest in an inexpensive OBD2 reader. They will tell you the code number if you have one and let you reset or remove the code if one gets set. if you have a real problem the code will just come back. This will save you from the batter reset that forces you to reset everything in the truck after.I had my 1st evic trouble code this weekend just after going thru a carwash. My 3rd (high-mount) brake light bulb got fried as a result of a poor seal of the brake light/cargo light. I replaced the bulb. Now, how do I clear the trouble code indication off the dash display?