Engine Controls Schematics. GMC Truck Envoy

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2004 🢒 Envoy - 2WD 🢒 Engine 🢒 Engine Controls - 4.2L 🢒 Engine Controls Schematics

Figure 1:	Power, Ground, Serial Data, and MIL Master Electrical Component List Powertrain Control Module Description 5 Volt and Low Reference OBD II Symbol Description Notice B+ Bus - Underhood Fuse Block COILS, AIR, EAP, TBC 1, PCM B, LOW HDLP-RT, LOW HDLP-LT, HI HDLP-LT, and HI HDLP-RT Fuses PCM I and AIR SOL Fuses - 4.2L ACCY/RUN and RUN/START Bus Bars IGN E, TBC IGN 1, BACKUP, BTSI, and TRLR B/U Fuses ACCY/RUN/START, RUN, and START Bus Bars IGN 0, TBC IG, TBC ACC, FRT WPR, and RAIN Fuses IGN E, TBC IGN 1, BACKUP, BTSI, and TRLR B/U Fuses PCM I and AIR SOL Fuses - 4.2L Power, Ground, Serial Data, and MIL IGN 0, TBC IG, TBC ACC, FRT WPR, and RAIN Fuses G108 Power, Ground, Data Link Connector, and SP205
Figure 2:	5-Volt and Low Reference Master Electrical Component List Powertrain Control Module Description Engine Data Sensors - Pressure and Temperature Power, Ground, Serial Data, and MIL OBD II Symbol Description Notice
Figure 3:	Engine Data Sensors - Pressure and Temperature Master Electrical Component List Air Intake System Description Engine Data Sensors - Oxygen Sensors 5 Volt and Low Reference OBD II Symbol Description Notice
Figure 4:	Engine Data Sensors - Oxygen Sensors Master Electrical Component List Powertrain Control Module Description Engine Data Sensors - Throttle Actuator Controls and VSS Engine Data Sensors - Pressure and Temperature OBD II Symbol Description Notice ACCY/RUN and RUN/START Bus Bars
Figure 5:	Engine Data Sensors - Throttle Actuator Controls and VSS Master Electrical Component List Throttle Actuator Control (TAC) System Description Ignition Controls - Ignition System Engine Data Sensors - Oxygen Sensors OBD II Symbol Description Notice
Figure 6:	Ignition Controls - Ignition System Master Electrical Component List Electronic Ignition (EI) System Description Ignition Controls - Sensors Engine Data Sensors - Throttle Actuator Controls and VSS OBD II Symbol Description Notice ACCY/RUN and RUN/START Bus Bars PCM I and AIR SOL Fuses - 4.2L G109 G109 G109 G109 G109 G109 Gages
Figure 7:	Ignition Controls - Sensors Master Electrical Component List Electronic Ignition (EI) System Description Fuel Controls - Fuel Pump Controls and Fuel Injectors Ignition Controls - Ignition System OBD II Symbol Description Notice
Figure 8:	Fuel Controls - Fuel Pump Controls and Fuel Injectors Master Electrical Component List Fuel System Description Fuel Controls - EVAP Controls Ignition Controls - Sensors OBD II Symbol Description Notice ACCY/RUN and RUN/START Bus Bars B+ Bus - Underhood Fuse Block G104, G105, and G107 COILS, AIR, EAP, TBC 1, PCM B, LOW HDLP-RT, LOW HDLP-LT, HI HDLP-LT, and HI HDLP-RT Fuses PCM I and AIR SOL Fuses - 4.2L PCM I and AIR SOL Fuses - 4.2L G201 - 2 of 2, and G305
Figure 9:	Fuel Controls - EVAP Controls Master Electrical Component List Fuel System Description Device Controls (K18) Fuel Controls - Fuel Pump Controls and Fuel Injectors OBD II Symbol Description Notice ACCY/RUN and RUN/START Bus Bars
Figure 10:	Device Controls (K18) Master Electrical Component List Secondary Air Injection System Description Controlled/Monitored Subsystem References Fuel Controls - EVAP Controls OBD II Symbol Description Notice B+ Bus - Underhood Fuse Block ACCY/RUN and RUN/START Bus Bars G201 - 2 of 2, and G305 G104, G105, and G107
Figure 11:	Controlled/Monitored Subsystem References Master Electrical Component List Powertrain Control Module Description Transmission Control References - A/T Device Controls (K18) OBD II Symbol Description Notice Compressor Controls Compressor Controls 4.2L Starting System Charging System Gages Power, Ground, Serial Data, and Transfer Case Encoder Motor 04 S/T Utility Engine Cooling Schematics EBCM Power, Ground, Serial Data, Indicator, and Signal Circuits
Figure 12:	Transmission Control References - A/T Master Electrical Component List Powertrain Control Module Description Controlled/Monitored Subsystem References OBD II Symbol Description Notice Transmission Controls Transmission Controls Transmission Controls Transmission Controls EBCM Power, Ground, Serial Data, Indicator, and Signal Circuits PNP Switch and Indicator