2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 599

Engine Specifications Engine 4.3L V6 (LU3) 4.8L V8 (L20) 5.3L V8 Flexible Fuel with Active Fuel Management™ (Iron Block) (LMG) 5.3L V8 Flexible Fuel with Active Fuel Management™(Aluminum Block) (LC9) 6.0L V8 (Iron Block) (L96 or LY6) 6.2L V8 Flexible Fuel (Aluminum Block) (L9H) VIN Code X A 0 Transmission Automatic Automatic Automatic Spark Plug Gap 0.060 in (1.52 mm) 0.040 in (1.02 mm) 0.040 in (1.02 mm) 3 G or K 2 Automatic Automatic Automatic 0.040 in (1.02 mm) 0.040 in (1.02 mm) 0.040 in (1.02 mm) 6-139