GM Full Size Vans 1987-1997 Repair Guide

General Information


See Figure 1

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Fig. Fig. 1: Remove the engine cover to gain access to the distributor on DI equipped models

The Distributor Ignition (DI) system consists of the distributor, Hall effect switch (camshaft position sensor), ignition coil, secondary wires, spark plugs, knock sensor and crankshaft position sensor. The system is controlled by the Vehicle Control Module (VCM). The VCM, using information from various engine sensors, controls the spark timing, dwell, and firing of the ignition coil. It is used on 1993-96 models.