Engine Controls Schematics. GMC Truck Envoy

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 1999 🢒 Envoy - 4WD 🢒 Engine 🢒 Engine Controls - 4.3L 🢒 Engine Controls Schematics

Figure 1:	Cell 21: ECM B, ECM I and RDO BATT Fuses, GND, Generator and MIL Cell 10: ECM B Fuse and Horn, Rear Defogger Relays Power and Grounding Connector End Views Cell 10: ECM I Fuse Cell 10: AUX PWR, RDO BATT and HDLP SW Fuses Cell 150: Power and Ground (Chevy/GMC) Cell 10: AUX PWR, RDO BATT and HDLP SW Fuses Engine Controls Components Vehicle Control Module Description Cell 21: CLSTR and 4WD Fuses OBD II Symbol Description Notice Handling ESD Sensitive Parts Notice Cell 81: ILLUM, CLSTR and GAUGES Fuses and Instrument Cluster Handling ESD Sensitive Parts Notice VCM Connector End Views Cell 14: G103 and G105 (4.3L) Cell 14: G103 and G105 (4.3L)
Figure 2:	Cell 21: CLSTR and 4WD Fuses Cell 81: ILLUM, CLSTR and GAUGES Fuses and Instrument Cluster Cell 10: CRANK and CLSTR Fuses VCM Connector End Views Handling ESD Sensitive Parts Notice Cell 38: Front Axle Clutch Solenoid and Front Axle Switch Cell 38: Front Axle Clutch Solenoid and Front Axle Switch Cell 38: Power and Ground Cell 38: Transfer Case Encoder Motor Cell 38: Power and Ground Cell 10: 4WD Fuse (4.3L) Cell 10: CRANK and CLSTR Fuses Engine Controls Components Vehicle Control Module Description Cell 21: Data Link Connector Cell 21: ECM B, ECM I and RDO BATT Fuses, GND, Generator and MIL OBD II Symbol Description Notice
Figure 3:	Cell 21: Data Link Connector Cell 10: INT BATT Fuse Cell 19 (Except Envoy) Cell 14: G200, G201 and G207 (2-Door Utility w/ Endgate) Power and Grounding Connector End Views Cell 14: Body Relay Block and Underhood Fuse Block Cell 14: Body Relay Block and Underhood Fuse Block Cell 50: Power, Ground, SDM and VIU VCM Connector End Views Handling ESD Sensitive Parts Notice Engine Controls Components Vehicle Control Module Description Cell 21: Ignition Controls Cell 21: CLSTR and 4WD Fuses OBD II Symbol Description Notice Body Control System Connector End Views Cell 14: G103 and G105 (4.3L) Cell 14: G103 and G105 (4.3L) Cell 50: Class 2 Communication (4.3L) Cell 14: Body Relay Block and Underhood Fuse Block
Figure 4:	Cell 21: Ignition Controls Cell 10: ENG I and OXYSEN Fuses Cell 10: ECM I Fuse Power and Grounding Connector End Views Cell 21: MAF Sensor and IAC Valve Cell 81: G203, G204, Park Switch and PCM/VCM Cell 14: G103 and G105 (4.3L) VCM Connector End Views Handling ESD Sensitive Parts Notice Cell 14: G103 and G105 (4.3L) Engine Controls Components Vehicle Control Module Description Cell 21: Fuel Level Sensor Cell 21: Data Link Connector OBD II Symbol Description Notice Handling ESD Sensitive Parts Notice
Figure 5:	Cell 21: Fuel Level Sensor Handling ESD Sensitive Parts Notice Engine Controls Components Vehicle Control Module Description Cell 21: Fuel Pump Controls Cell 21: Ignition Controls OBD II Symbol Description Notice Cell 21: Engine Sensors (Utility) VCM Connector End Views Handling ESD Sensitive Parts Notice Cell 21: Engine Sensors (Pickup) Cell 21: Engine Sensors (Pickup)
Figure 6:	Cell 21: Fuel Pump Controls VCM Connector End Views Handling ESD Sensitive Parts Notice Power and Grounding Connector End Views Cell 14: G102 (Except Envoy) Cell 10: ECM B Fuse and Horn, Rear Defogger Relays Cell 14: G402 (Utility) Cell 110: License and Side Marker Lamps Cell 21: Heated Oxygen Sensors Engine Controls Components Vehicle Control Module Description Cell 21: Fuel Injection Controls Cell 21: Fuel Level Sensor OBD II Symbol Description Notice
Figure 7:	Cell 21: Fuel Injection Controls Cell 10: ECM I Fuse Power and Grounding Connector End Views VCM Connector End Views Handling ESD Sensitive Parts Notice Engine Controls Components Vehicle Control Module Description Cell 21: Engine Sensors (Pickup) Cell 21: Fuel Pump Controls OBD II Symbol Description Notice
Figure 8:	Cell 21: Engine Sensors (Pickup) VCM Connector End Views Cell 21: EGR and EVAP Valves Cell 81: G203, G204, Park Switch and PCM/VCM Cell 21: Fuel Level Sensor Cell 21: EGR and EVAP Valves Cell 21: Automatic Transmission Valve Controls Handling ESD Sensitive Parts Notice Handling ESD Sensitive Parts Notice Engine Controls Components Vehicle Control Module Description Cell 21: Engine Sensors (Utility) Cell 21: Fuel Injection Controls OBD II Symbol Description Notice
Figure 9:	Cell 21: Engine Sensors (Utility) Cell 21: EGR and EVAP Valves VCM Connector End Views Cell 81: G203, G204, Park Switch and PCM/VCM Cell 21: Fuel Level Sensor Cell 21: EGR and EVAP Valves Cell 21: Automatic Transmission Valve Controls Handling ESD Sensitive Parts Notice Engine Controls Components Vehicle Control Module Description Cell 21: Heated Oxygen Sensors Cell 21: Engine Sensors (Pickup) OBD II Symbol Description Notice Handling ESD Sensitive Parts Notice
Figure 10:	Cell 21: Heated Oxygen Sensors Power and Grounding Connector End Views Cell 10: ENG I and OXYSEN Fuses VCM Connector End Views Handling ESD Sensitive Parts Notice Cell 14: G102 (Except Envoy) Cell 14: G104 and G117 Engine Controls Components Vehicle Control Module Description Cell 21: MAF Sensor and IAC Valve Cell 21: Engine Sensors (Utility) OBD II Symbol Description Notice
Figure 11:	Cell 21: MAF Sensor and IAC Valve Power and Grounding Connector End Views Cell 10: ENG I and OXYSEN Fuses Cell 21: EGR and EVAP Valves Cell 21: Ignition Controls VCM Connector End Views Handling ESD Sensitive Parts Notice Engine Controls Components Vehicle Control Module Description Cell 21: EGR and EVAP Valves Cell 21: Heated Oxygen Sensors OBD II Symbol Description Notice Handling ESD Sensitive Parts Notice Cell 14: G103 and G105 (4.3L)
Figure 12:	Cell 21: EGR and EVAP Valves Handling ESD Sensitive Parts Notice Power and Grounding Connector End Views Cell 21: MAF Sensor and IAC Valve Cell 10: ENG I and OXYSEN Fuses Engine Controls Components Vehicle Control Module Description Cell 21: AIR Pump Control Cell 21: MAF Sensor and IAC Valve OBD II Symbol Description Notice VCM Connector End Views Cell 21: Engine Sensors (Pickup) Cell 21: Engine Sensors (Pickup)
Figure 13:	Cell 21: AIR Pump Control Power and Grounding Connector End Views Cell 10: IGN E Fuse and A/C Compressor, Rear Defogger, DRL Relays Cell 10: B+ Buss Bar Cell 10: B+ Buss Bar VCM Connector End Views Handling ESD Sensitive Parts Notice Engine Controls Components Vehicle Control Module Description Cell 21: Vehicle Speed Sensor Cell 21: EGR and EVAP Valves OBD II Symbol Description Notice
Figure 14:	Cell 21: Vehicle Speed Sensor VCM Connector End Views Cell 21: Heated Oxygen Sensors Cell 38: Speed Sensors Cell 38: Speed Sensors Cell 14: G104 and G117 Handling ESD Sensitive Parts Notice Engine Controls Components Vehicle Control Module Description Cell 21: Brake Switch Input Cell 21: AIR Pump Control OBD II Symbol Description Notice
Figure 15:	Cell 21: Brake Switch Input Cell 10: STUD 2, ABS, TBC and RR W/W Fuses Cell 44: Power and Ground VCM Connector End Views Handling ESD Sensitive Parts Notice Cell 34: Clutch Pedal Position Switch and TCC/Stop Lamp Switch Cell 34: Clutch Pedal Position Switch and TCC/Stop Lamp Switch Cell 34: Clutch Pedal Position Switch and TCC/Stop Lamp Switch Engine Controls Components Vehicle Control Module Description Cell 21: Vehicle Speed Signal, TCSCM and Front Axle Switch Cell 21: Vehicle Speed Sensor OBD II Symbol Description Notice
Figure 16:	Cell 21: Vehicle Speed Signal, TCSCM and Front Axle Switch Handling ESD Sensitive Parts Notice Cell 86: Outside Ambient Temperature Display Sensor (w/ Trip Computer) Cell 51: Power and Ground Entertainment Connector End Views Handling ESD Sensitive Parts Notice Handling ESD Sensitive Parts Notice Antilock Brake System Connector End Views Handling ESD Sensitive Parts Notice Engine Controls Components Vehicle Control Module Description Cell 21: Automatic Transmission Valve Controls Cell 21: Brake Switch Input OBD II Symbol Description Notice Cell 44: Class 2 Communication Transfer Case Control Connector End Views Handling ESD Sensitive Parts Notice VCM Connector End Views Handling ESD Sensitive Parts Notice
Figure 17:	Cell 21: Automatic Transmission Valve Controls Handling Electrostatic Discharge Sensitive Parts Notice Cell 10: CRANK and CLSTR Fuses Cell 81: ILLUM, CLSTR and GAUGES Fuses and Instrument Cluster Cell 138: Park/Neutral Position Switch and Automatic Transmission Controller (Utility w/ Floor Shift) Cell 21: CLSTR and 4WD Fuses VCM Connector End Views Handling ESD Sensitive Parts Notice Engine Controls Components Vehicle Control Module Description Cell 21: Automatic Transmission Switch Inputs Cell 21: Vehicle Speed Signal, TCSCM and Front Axle Switch OBD II Symbol Description Notice
Figure 18:	Cell 21: Automatic Transmission Switch Inputs VCM Connector End Views Handling ESD Sensitive Parts Notice Engine Controls Components Vehicle Control Module Description Cell 21: Manual A/C Compressor Control Cell 21: Automatic Transmission Valve Controls OBD II Symbol Description Notice Tilt Wheel/Column Connector End Views Cell 21: Engine Sensors (Pickup) Handling ESD Sensitive Parts Notice Cell 14: G103 and G105 (4.3L) Cell 21: Vehicle Speed Sensor
Figure 19:	Cell 21: Manual A/C Compressor Control Cell 10: HTD SEAT, ATC, HVAC and A/C Fuses Power and Grounding Connector End Views Cell 10: IGN E Fuse and A/C Compressor, Rear Defogger, DRL Relays Cell 14: G102 (Except Envoy) Cell 21: Heated Oxygen Sensors VCM Connector End Views Handling ESD Sensitive Parts Notice Cell 14: G103 and G105 (4.3L) HVAC Connector End Views Cell 10: HVAC and CRUISE Fuses Engine Controls Components Vehicle Control Module Description Cell 21: Automatic A/C Compressor Control Cell 21: Automatic Transmission Switch Inputs OBD II Symbol Description Notice Cell 63
Figure 20:	Cell 21: Automatic A/C Compressor Control Cell 10: HTD SEAT, ATC, HVAC and A/C Fuses Power and Grounding Connector End Views Cell 10: IGN E Fuse and A/C Compressor, Rear Defogger, DRL Relays Cell 14: G102 (Except Envoy) Cell 21: Heated Oxygen Sensors Cell 14: G103 and G105 (4.3L) VCM Connector End Views Handling ESD Sensitive Parts Notice Cell 50: Class 2 Communication (4.3L) Handling ESD Sensitive Parts Notice Engine Controls Components Vehicle Control Module Description Cell 21: Manual A/C Compressor Control OBD II Symbol Description Notice