1999 Buick Riviera Owner's Manual - Page 300

yellowblue Supercharged Engine Accessory Belt (L67) The Supercharged 3800 V6 engine uses two accessory drive belts. One belt drives the generator, power steering pump, coolant pump and air conditioning compressor. The second belt drives the supercharger. Each belt has its own tensioner and idler pulley. 1. Front Belt 2. Back Belt A. Generator B. Power Steering C. Crank D. Supercharger E. Coolant Pump F. Air Conditioning 6-68