One problem related to defogger has been reported for the 2000 Chevrolet Suburban. The most recently reported issues are listed below.
(during cold weather warm up) loading vehicle while running, with rear hatchback open, and having rear heater fan on higher blower settings: this allows exhaust from (right side of vehicle) to be pulled into the rear heat air intake vent (also on the right side, extreme rear of vehicle) and is distibuted to occupants in vehicle. We had an 11 month old placed in a car seat when this occurred (upper heat vents selected) which allowed carbon monoxide to be blown directly into his face. . I imagine this could occur during any cold weather idling situation with the rear heater fan setting on higher positions (such as loading groceries after shopping, while children sit inside). Thank you.