Description The EGR valve is located atop the intake manifold in a port that is machined into the manifold (figure 5-50). A vacuum-operated pintle in…
Category: GM 6.5
EGR CONTROL PRESSURE/BARO SENSOR The EGR control pressure/baro sensor is mounted on the left side of the cowl (figure 5-48). The sensor produces a voltage…
The PCM monitors input from the EGR control pressure/baro sensor, APP sensors, crankshaft position sensor (engine speed), and engine coolant temperature to control the amount…
Description On turbocharged engines, the exhaust gases pass from the exhaust manifold through the turbocharger, turning the turbine blades. The compressor side of the turbocharger…
BOOST SENSOR (Turbo Only) Description The boost sensor (figure 5-44) on turbocharged engines measures fluctuations in intake manifold pressure and vacuum that occur as a…
The PCM monitors the APP sensors, engine speed, and intake manifold boost pressure as indicated by the boost sensor to energize the solenoid that controls…
GLOW PLUG RELAY AND LAMP The glow plug relay is located at the rear of the left cylinder head. When commanded by the PCM, the…
The glow plug system assists in providing the heat required to begin combustion during engine starting at cold ambient temperatures. The glow plugs are heated…
Timing on the 6.5L EFI diesel is dependent on three variables: 1. Injection pump position, as indicated by the cam sensor and disc 2. TDC…
Description The injection timing stepper motor is located on the right side of the injection pump. The motor housing contains two coils that are controlled…