LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 1989 >> Forward Control 3.9 L, Standard >> Repair and Diagnosis >> Engine Performance >> Adjustment >> Tune-Up - V8 >> Adjustments >> Ignition System >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Ignition System: Notes

SPARK PLUG TYPE

Application AC No.
5.0L, 5.7L & 7.4L TBI CR43TS
7.4L 4-Bbl. R44T
SPARK PLUG SPECIFICATIONS

Application Gap: In. (mm) Torque: Ft. Lbs. (N.m)
5.0L, 5.7L & 7.4L TBI .035 (.89) 17-27 (23-37)
7.4L Carb. .045 (1.14) 17-27 (23-37)