2009 Buick Lucerne Owner's Manual - Page 391

Capacities Application Transmission Fluid - Drain and Refill 3.9L V6 Engine 4.6L V8 Engine Wheel Nut Torque 7.4 qt 7.4 qt 100 lb ft 7.0 L 7.0 L 140 Y English Metric All capacities are approximate. When adding, be sure to fill to the approximate level, as recommended in this manual. Recheck fluid level after filling. Engine Specifications Engine 3.9L V6 Engine 3.9L V6 Engine 4.6L V8 Engine VIN Code 1 M 9 Transmissions Automatic Automatic Automatic Spark Plug Gap 0.040 in (1.01 mm) 0.040 in (1.01 mm) 0.050 in (1.27 mm) 5-107