LS V6-3.0L DOHC VIN S (2000)
Powertrain Control Module: Description and Operation
Fuel Charging and Controls
The Powertrain Control Module (PCM) controls the fuel injection system. Injector pulse-width is varied to control the amount of fuel flow. Varying fuel
pump output controls fuel pressure. The PCM commands the fuel pump driver module, which directly controls the fuel pump. At low speeds, the Idle Air
Control (IAC) valve controls the bypass air around the throttle plate.