GM Lumina/Silhouette/Transport APVs 1990-1999 Repair Guide

General Information


The function of the fuel metering system is to deliver the correct amount of fuel to the engine under all operating conditions. Fuel is delivered by the Throttle Body Fuel Injection (TBI) unit, which is controlled by the Powertrain Control module (PCM).

See Figure 1

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Fig. Fig. 1: Exploded view of the TBI unit