2000 GMC Yukon XL 1500 SLE 8 Cyl 5.3L
warning lights on and off
more than one warning light come on. Like the brake, abs, set belt, and low fuel light could go on at once or in any order at anytime they could be all off.
Did you already diagnose your vehicle with a scan tool to determine if there are stored trouble codes in your vehicle? And that trouble codes will help you track the right direction in fixing your vehicle.