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Home >> GMC >> 1995 >> Forward Control 7.4 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Controls - Remove/Install/Overhaul - 4.3L) >> Ignition System >> Distributor (HVI - High Value Ignition System) >> Notes

Distributor (HVI - High Value Ignition System): Notes

WARNING: This page is about a different variant/trim than selected.

The M/L model vehicles equipped with 4.3L (VIN W) engine use the HVI system. The "distributor" is called the High Voltage Switch (HVS). System is also referred to as the HVI/HVS system. The HVS includes a camshaft position sensor.

CAUTION: HVS ("distributor") is installed in a fixed, nonadjustable position. Base timing is computer controlled and cannot be adjusted by rotating HVS. Attempting to do so may result in crossfire and misfire conditions. If HVS is installed incorrectly a DTC 1345 may be set.