GMC 2016 Sierra Owner's Manual page 471

470 Technical Data
4.3L V6 (LV1)
5.3L V8 (L83)
6.0L V8 (L96)
6.2L V8 (L86)
Engine Specifications (cont'd)
Engine VIN Code Spark Plug Gap
P 0.95 1.10 mm (0.037
C 0.95 1.10 mm (0.037
G 0.95 1.10 mm (0.037
J 0.95 1.10 mm (0.037
0.043 in)
0.043 in)
0.043 in)
0.043 in)