RepairPal Certified shops can diagnose and repair your 2000 GMC Safari. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
There are 3 O2 sensors. Bank 1, sensor 1 is on the drivers side exhaust pipe in front of the catalytic converter. Bank 2 sensor 1 is on the passenger side exhaust in front of the cat, and Bank 1 sensor 3 is located in the exhaust pipe right behind the cat.