GMC Sierra Denali 2014 Owner's Manual page 389

5.3L V8 (L83)
6.0L V8 (L96)
6.2L V8 (L86)
Engine Specifications
Engine
Technical Data
VIN Code
C 0.95 1.10 mm (0.037
G 0.95 1.10 mm (0.037
J 0.95 1.10 mm (0.037
12-3
Spark Plug Gap
0.043 in)
0.043 in)
0.043 in)