LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 1989 >> Forward Control 6.2 J, Standard >> Repair and Diagnosis >> Engine Performance >> Adjustment >> Tune-Up - 6-CYL >> Specifications >> Service Intervals
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Service Intervals

REPLACEMENT INTERVALS

Component Interval (Miles)
Air Filter 30,000
Coolant 30,000
Fuel Filter 60,000
Oil & Filter
Normal Service 7500
Severe Service 3000
PCV Valve 60,000
Spark Plugs 30,000
scientia non olet · About LEMON Manuals