One problem related to roof and pillar has been reported for the 2000 Chevrolet Suburban. The most recently reported issues are listed below.
2000 Chevrolet Suburban, sliding sunroof (option cf5 I think) - annoying gurgling noise comes from this area during rain and while driving approximately 30 mph or faster. Dealer has worked on problem for past 3 years periodically - always "unable to duplicate" until recently. They rerouted water drain tube in roof area to eliminate problem with no improvement. Gm needs to find a solution.