DRLs are not coming the bulbs and the fuses have been changed what else can you do to correct this problem you have a 1999 Chevrolet Silverado Z71 Extended cab?

Check to make sure your parking brake is completely off. Whenever you set the parking brake, there is an electrical connection that shuts off the drls. Look up under the dash on the driver's side where the parkign brake lever is and look at the connections. The only way the DRLs come on is when the parkign brake is completely off. Even one click will keep the DRLs from coming on. Look there for a possible answer.