LEMON Manuals
: Even more car manuals for everyone: 1960-2025
Home
>>
GMC
>>
1994
>>
Forward Control 7.4 N
>>
Repair and Diagnosis
>>
Engine Performance
>>
Specifications
>>
Engine Controls - Specifications - Gasoline
April 5, 2026:
LEMON Manuals is launched!
Read the announcement.
Engine Controls - Specifications - Gasoline
Expand All (for easy ctrl-f)
Collapse All
Introduction
Model Identification
Capacities
Battery Specifications
Fluid Capacities
Quick-Service
Service Intervals & Specifications
Drive Belt Tension Adjustment
Mechanical Checks
Engine Compression
Valve Clearance
Ignition System
Ignition Coil
High Tension Wire Resistance
Spark Plugs
Firing Order & Timing Marks
Notes
Firing Order & Timing Marks (4.3L)
Firing Order & Timing Marks (5.0L, 5.7L & 7.4L)
Ignition Timing
Fuel System
Fuel Pump
Injector Resistance
Idle Speed & Mixture
Minimum Idle Speed