Three problems related to dash wiring have been reported for the 1999 GMC Suburban. The most recently reported issues are listed below.
While driving up the interstate, the headlights went out. Moved the tilt steering wheel a notch or two and the lights came back on. We drove a few more miles and they went out again, this time accompanied by a burning smell. Took it to gm garage (who wanted $90 an hour) to look at it. I checked it out myself and found wires corroded in the harness (located in steering column) and two burned through. Cleaned the wires and soldered them back. Contacted gm about problem, received no help. Checked with insurance company and filed a statement with them. Wiring harness will have to be replaced.
When starting the vehicle consumer noticed black smoke coming from the dashboard. Consumer turned the vehicle off, and called the fire department. The fire department was able to put the fire out.
While driving at any speed passenger noticed that fluid was leaking from underneath the dashboard. Consumer drove the vehicle to the dealer for inspection, and mechanic could not duplicate the problem.