Spark Plug Specifications
SPARK PLUG SPECIFICATIONS
| Application | Specification | |
|---|---|---|
| Glow Plugs Type - 6.6L Diesel (VIN No.) | ||
| LB6 ("1") | GM 97226202 | |
| LLY ("2") | GM 97326305 | |
| Spark Plug Type (VIN No.) | ||
| 4.3L ( "X") | AC R41-932 | |
| 4.8L ("V"), 5.3L ("Z"& "T") , 6.0L ("U" & "N") & 8.1L ("G") | AC R41-985 | |
| Gap | Iridium .040 in. (1.04 mm) Platinum .060 in. (1.52 mm) |
|
| Tightening Torque | ||
| Glow Plugs | 13 Ft. Lbs. (18 N.m) | |
| Spark Plugs | Tighten to 15 ft. lbs. (20 N.m) when using NEW cylinder head. Tighten to 11 ft. lbs. (15 N.m) for all subsequent installations. | |
| Firing Order | ||
| 4.3L | 1-6-5-4-3-2 | |
| 4.8L, 5.3L, 6.0L & 8.1L | 1-8-7-2-6-5-4-3 | |
| 6.6L Diesel | 1-2-7-8-4-5-6-3 | |