LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 1996 >> Forward Control 7.4 J >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation - Diesel >> Computerized Engine Controls >> Input Devices >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Input Devices: Notes

Each sensor or switch furnishes electronic (voltage) signals to PCM. The PCM uses these input signals to control fuel flow, injector timing, cruise control, transmission shifts, EGR, TCC, cold advance and glow plug systems. Various models are equipped with different combinations of input devices. Not all devices are used on all models. To determine the input usage on a specific model, see appropriate wiring diagram in WIRING DIAGRAMS article. The available input signals include: