Owner's Manual

Black plate (5,1)
Chevrolet Silverado Owner Manual - 2012
Technical Data 12-5
Engine Specifications
Engine VIN Code Spark Plug Gap
4.3L V6 (LU3) X 1.52 mm (0.060 in)
4.8L V8 (L20) A 1.02 mm (0.040 in)
5.3L V8 FlexFuel with Active Fuel Management™
(Iron Block) (LMG)
0 1.02 mm (0.040 in)
5.3L V8 FlexFuel with Active Fuel Management™
(Aluminum Block) (LC9)
7 1.02 mm (0.040 in)
6.0L V8 FlexFuel with Active Fuel Management™
(Aluminum Block) (LZ1)
J 1.02 mm (0.040 in)
6.0L V8 (Iron Block) (L96) G 1.02 mm (0.040 in)
6.2L V8 FlexFuel (Aluminum Block) (L9H) 2 1.02 mm (0.040 in)