I had the same poblem with my 1999 Suburban. If you open the back cargo doors you will notice on the inside top on te hinge side 4 pegs on the right side and 2 on the left. Take a piece of sand paper and clean these off so they make a good connection. You will notice they are a little corroded and won't take much effort.
I hope this fixes your problem because it fixed mine.
Sunday, May 6th, 2007 AT 2:11 PM