LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 1999 >> Suburban C2500, 7.4 J >> Repair and Diagnosis (Single Page) >> Engine Performance >> Specifications >> Engine Controls - Service & Adjustment Specifications >> Ignition System >> Spark Plugs
October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Spark Plugs

SPARK PLUG TYPE

Application Type Part No.
1.6L & 2.0L Denso K20PR-U11
- NGK BKR6E-11
2.2L AC 41-948
3.4L AC 41-940
4.3L, 4.8L, 5.0L, 5.3L, 5.7L, 6.0L & 7.4L AC 41-932
SPARK PLUG SPECIFICATIONS

Application Gap In. (mm) Torque Ft. Lbs. (N.m)
1.6L & 2.0L .039-.043 (1.0-1.1) 18 (25)
2.2L .050 (1.27) 13 (17)
3.4L .060 (1.52) 20 (27)
4.3L
VIN W .060 (1.52) (1) 11 (15)
VIN X .045 (1.14) (1) 11 (15)
4.8L, 5.0L, 5.3L, 5.7L & 6.0L .060 (1.52) (1) 11 (15)
7.4L .060 (1.52) (1) 15 (20)
(1) Tighten spark plugs to 22 ft. lbs. (30 N.m) when using NEW iron cylinder head. Tighten spark plugs to 15 ft. lbs. (20 N.m) when using NEW aluminum cylinder head.