ENGINE PERFORMANCE – Chevrolet Express 1500 LS 2014 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.3L VIN X

4.3L VIN X, Engine Performance Wiring Diagram (1 of 3) for Chevrolet Express 1500 LS 2014

List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (1 of 3) for Chevrolet Express 1500 LS 2014:

• (behind lower right side of dash) body control module
• (cutaway: in chassis harness, 87 cm from ebcm connector breakout) (passenger/cargo: in chassis harness, 44 cm from ebcm connector breakout)
• (in exhaust pipe, in back of catalytic converter) heated oxygen sensor (ho2s) bank 1 sensor 2
• (in exhaust pipe, in back of catalytic converter) heated oxygen sensor (ho2s) bank 2 sensor 2
• 5v ref 2
• A/c refrigerant pressure sensor
• Acc wak ser data
• Accelerator pedal position (app) sensor (under left side of dash)
• Air conditioning system
• Anti-lock brakes system
• App sens 2 sig
• App sensor 1 sig
• Batt pos volt
• Brake lo ref
• Brake pedal position (bpp) sensor (top of brake pedal assembly)
• Brake sens sig
• Brk sens sply
• Clutch rly ctrl
• Computer data lines system
• Data serial gmlan lo spd
• Driver information center display
• Ecm batt fuse 19 10a
• Ecm ign/ glow plug mdl ign fuse 30 15a
• Engine control module (ecm)
• Fuel lvl sens sig
• Fuel pump & sender assembly (on fuel tank)
• Fuel tank pressure (ftp) sensor (on fuel tank)
• G400 (on inner left rear frame rail)
• Gmlan ser data+
• Gmlan ser data-
• Ho2s hi sig
• Ho2s lo ctrl
• Ho2s lo sig
• Hot at all times
• Hot w/ run/ crnk relay 15 energized
• Ign volt
• Instrument cluster
• J301
• Logic
• Low ref
• Maf sens sig
• Malfunction indicator lamp
• Mil ctrl
• Nca
• Pnk
• Pnk pnk
• Press sens sig
• Pressure ind low engine oil
• Pump rly ctrl
• Pwrtrn rly ctrl
• Starter rly ctrl
• Starting/ charging system
• Tan
• Tan c
• Tos signal
• Transmissions system
• Underhood fuse block (on left side of engine compt)
• Vss signal
• X100
• X101
• X103

4.3L VIN X, Engine Performance Wiring Diagram (2 of 3) for Chevrolet Express 1500 LS 2014

List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (2 of 3) for Chevrolet Express 1500 LS 2014:

• (in engine harness, 16 cm from underhood fuse block x1 breakout) j123
• (on top of engine, near throttle body) evaporative emission (evap) canister purge solenoid
• 5v ref 1
• Brk aply sens sig
• Brk sw fuse 13 10a
• Cnstr vent sol fuse 56 10a
• Ecm pwr/trn fuse 78 10a
• Engine control module (ecm)
• Engine oil pressure (eop) sensor (on top rear of engine)
• Evap sol ctrl
• Evaporative emission (evap) canister vent solenoid valve (near front of fuel tank)
• Exterior lights system
• Fuel pump relay
• G102 (right rear of engine)
• G103 (left rear of engine)
• Gas fuel pump fuse 24 30a
• Hot at all times
• Hot w/ run/ crnk relay 15 energized
• Iat sens sig
• Ign volt
• J101
• J102
• J151
• Maf/ cnstr vent fuse 64 15a
• Manifold absolute pressure (map) sensor (attached to intake manifold tube)
• Mass air flow (maf)/intake air temperature (iat) sensor (attached to air intake duct)
• O2 snsr 1 (pre)/cls fuse 77 10a
• O2 snsr 2 (post) fuse 62 10a
• Odd ign/inj fuse 65 20a
• Park/neutral sig
• Pnk
• Pwr/trn relay 49
• Stop lamp switch (behind left side of dash, above brake pedal)
• Tan
• Tcc brake sig
• Transmissions system
• Underhood fuse block (on left side of engine compt)
• V6 fuel inj fuse 75 15a
• X100
• X101
• X221

4.3L VIN X, Engine Performance Wiring Diagram (3 of 3) for Chevrolet Express 1500 LS 2014

List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (3 of 3) for Chevrolet Express 1500 LS 2014:

• (at top of engine) central sequential fuel injection (central sfi)
• (inside intake manifold at cylinder) fuel injectors
• 5v ref 1
• 5v ref 2
• Camshaft position (cmp) sensor (part of distributor, top rear of engine)
• Ckp sens sig
• Cmp sens sig
• Crankshaft position (ckp) sensor (on lower front of engine, near crankshaft)
• Ect sens sig
• Engine control module (ecm)
• Engine coolant temperature (ect) sensor (on left side of engine)
• Evap sol ctrl
• G103 (left rear of engine)
• Gen field sig
• Gen on sig
• Gnd
• Gnd e
• Heated oxygen sensor (ho2s) bank 1 sensor 1 (in exhaust pipe, in front of catalytic converter)
• Heated oxygen sensor (ho2s) bank 2 sensor 1 (in exhaust pipe, in front of catalytic converter)
• Ho2s hi sig
• Ho2s lo ctrl
• Ho2s lo sig
• Ic 1 ctrl
• Ic 2 ctrl
• Ic 3 ctrl
• Ic1 ctrl b
• Ic3 ctrl c
• Ign volt f
• Ignition control module (icm) (on top right side of engine, ic2 ctrl at ignition coil)
• Inj 1 ctrl
• Inj 2 ctrl
• Inj 3 ctrl
• Inj 4 ctrl
• Inj 5 ctrl
• Inj 6 ctrl
• J101
• J102
• J120
• J150
• Knock sensor (ks) 1
• Knock sensor (ks) 2
• Ks 1 sig
• Ks 2 sig
• Low ref
• Low ref d
• Map sens sig
• Nca
• Pnk
• Red
• Sens sig
• Starting/charging system
• Tac mtr 1
• Tac mtr 2
• Tan
• Throttle body
• Tp sens 1
• Tp sens 2
• X176

5.3L VIN 4

5.3L VIN 4, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Express 1500 LS 2014

List of elements for 5.3L VIN 4, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Express 1500 LS 2014:

• (5.3l)
• (cutaway: in chassis harness, 87 cm from ebcm connector breakout) (passenger/cargo: in chassis harness, 44 cm from ebcm connector breakout)
• (in engine harness, 16 cm from underhood fuse block x1 breakout) j123
• (in exhaust pipe, in back of catalytic converter) heated oxygen sensor (ho2s) bank 1 sensor 2
• (in exhaust pipe, in back of catalytic converter) heated oxygen sensor (ho2s) bank 2 sensor 2
• (in instrument panel harness, 5 cm from x200 breakout towards instrument panel cluster) j231
• (or pnk)
• 5.3l
• 5v ref 1
• 5v ref 2
• A/c refrigerant pressure sensor
• Acc ser data
• Accelerator pedal position (app) sensor (under left side of dash)
• Anti-lock brakes system
• App sens 1 sig
• App sens 2 sig
• Batt pos volt
• Brake pedal position (bpp) sensor (top of brake pedal assembly)
• Brk sens sig
• Brk sens sply
• Brk sw fuse 13 10a
• Comp sens sig
• Computer data lines system
• Cutaway
• Ecm batt fuse 19 10a
• Ecm ign/ glow plug mdl ign fuse 30 15a
• Ect sens sig
• Engine control module (ecm)
• Except 5.3l
• Exterior lights system
• Fuel level sens
• Fuel pump & sender assembly (on fuel tank)
• Fuel tank pressure (ftp) sensor (on fuel tank)
• G103 (on right rear of engine)
• Gmlan data+
• Gmlan data-
• Ho2s hi sig
• Ho2s lo sig
• Hot at all times
• Hot w/ run/ crnk relay 15 energized
• Iat sens sig
• Ign volt
• J101
• J301
• Low ref
• Maf sens sig
• Mass air flow (maf)/intake air temperature (iat) sensor (attached to air intake duct)
• Park/neutral sig
• Pnk
• Press sens sig
• Pwrtrn rly ctrl
• Relay ctrl
• Start rly ctrl
• Starting/ charging system
• Stop lamp switch (behind left side of dash, above brake pedal)
• Tan
• Tcc brake sig
• Transmissions system
• Underhood fuse block (on left side of engine compt)
• Vss
• X100
• X101
• X103
• X128
• X221

5.3L VIN 4, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Express 1500 LS 2014

List of elements for 5.3L VIN 4, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Express 1500 LS 2014:

• (on left rear of engine) g102
• (on right rear of engine) g103
• (or pnk)
• 4.8l
• 5.3l
• Air conditioning system
• Clutch rly ctrl
• Cnstr vent sol fuse 56 10a
• Computer data lines system
• Driver information center display
• Ecm pwr/trn fuse 78 10a
• Engine control module (ecm)
• Engine coolant radiator temperature sensors
• Evap sol ctrl
• Evaporative emission (evap) canister vent solenoid (near front of fuel tank)
• Even ign/ inj fuse 79 20a
• Flex fuel fuse 15a
• Fuel pump relay 38 (4.8l)
• G400 (on inner left rear frame rail)
• Gas fuel pump fuse 24 30a
• Gmlan ser data
• Gnd
• Ho2s hi sig
• Ho2s lo ctrl
• Hot at all times
• Ic 1 ctrl
• Ic 2 ctrl
• Ic 3 ctrl
• Ic 4 ctrl
• Ic 5 ctrl
• Ic 6 ctrl
• Ic 7 ctrl
• Ic 8 ctrl
• Instrument cluster
• J101
• J102
• Lo spd
• Logic
• Low engine oil pressure ind
• Low ref
• Maf/ cnstr vent fuse 64 15a
• Malfunction indicator lamp
• Mil ctrl
• O2 snsr 1 (pre)/cls fuse 77 10a
• O2 snsr 2 (post) fuse 62 10a
• Odd ign/inj fuse 65 20a
• Pnk
• Pwr/trn relay 49
• Tan
• Tos sig
• Transmissions system
• Underhood fuse block (on left side of engine compt)
• X100
• X101
• X127
• X150

5.3L VIN 4, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Express 1500 LS 2014

List of elements for 5.3L VIN 4, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Express 1500 LS 2014:

• (at rear of vehicle, attached to left rear frame rail) (5.3l) fuel pump flow control module
• (at top left of engine)
• (in odd ignition/coil module jumper harness, on top left side of engine)
• 5v ref
• Body control module (behind lower right side of dash)
• Brake lo ref
• Brake sens sig
• Computer data lines system
• Fcsm batt fuse 36 20a
• Fscm ign fuse 6 10a
• G102 (on left rear of engine)
• G300 (on left frame rail, near ebcm)
• Gmlan data +
• Gmlan data -
• Gnd
• Hot at all times
• Hot w/ run/ crnk relay 15 energized
• Ign volt
• Ignition coil/module 1
• Ignition coil/module 3
• Ignition coil/module 5
• Ignition coil/module 7
• J102
• J182
• J184 (in odd ignition/coil module jumper harness, on top left side of engine)
• J187
• J315
• Low ref
• Nca
• Pnk
• Pnk d
• Pump ctrl
• Red c
• Relay ctrl
• Sens sig
• Serial data
• Spark plug
• Tan
• Underhood fuse block (on left side of engine compt)
• X126

5.3L VIN 4, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Express 1500 LS 2014

List of elements for 5.3L VIN 4, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Express 1500 LS 2014:

• (at top right of engine)
• (in even ignition/coil module jumper harness, on top right side of engine)
• (in even ignition/coil module jumper harness, on top right side of engine) j183
• (on left side of intake manifold)
• (on right side of intake manifold)
• C10
• Engine oil pressure (eop) sensor (on top rear of engine)
• Fuel composition sensor
• Fuel injector 1
• Fuel injector 2
• Fuel injector 3
• Fuel injector 4
• Fuel injector 5
• Fuel injector 6
• Fuel injector 7
• Fuel injector 8
• Fuel rail pressure (fpr) sensor
• G102 (on left rear of engine)
• G103 (on right rear of engine)
• Ignition coil/module 2
• Ignition coil/module 4
• Ignition coil/module 6
• Ignition coil/module 8
• J101
• J102
• J185
• J188
• Nca
• Pnk
• Pnk d
• Red c
• Spark plug
• Tan
• X101
• X127

5.3L VIN 4, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Express 1500 LS 2014

List of elements for 5.3L VIN 4, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Express 1500 LS 2014:

• (on top of engine, near throttle body) evaporative emission (evap) canister purge solenoid valve
• 5v ref 1
• 5v ref 2
• Camshaft position (cmp) sensor (front of engine)
• Cen field sig
• Ckp sens sig
• Cmp sens sig
• Crankshaft position (ckp) sensor (on lower right rear of engine, near starter motor)
• Ect sens sig
• Engine control module (ecm)
• Engine coolant temperature (ect) sensor (at left front of engine)
• Gen on sig
• Heated oxygen sensor (ho2s) bank 1 sensor 1 (in exhaust pipe, in front of catalytic converter)
• Heated oxygen sensor (ho2s) bank 2 sensor 1 (in exhaust pipe, in front of catalytic converter)
• Ho2s hi sig
• Ho2s lo ctrl
• Ho2s lo sig
• Inj 1 ctrl
• Inj 2 ctrl
• Inj 3 ctrl
• Inj 4 ctrl
• Inj 5 ctrl
• Inj 6 ctrl
• Inj 7 ctrl
• Inj 8 ctrl
• Knock sensor (ks) 1
• Knock sensor (ks) 2
• Ks 1 sig
• Ks 2 sig
• Low ref
• Manifold absolute pressure (map) sensor (at top rear of engine, on intake manifold)
• Map sens sig
• Pnk
• Pnk d
• Pre sens sig
• Sol ctrl
• Starting/ charging system
• Starting/charging system
• Tac mtr ctrl 1
• Tac mtr ctrl 2
• Tan
• Tan a
• Throttle body
• Tp sens 1 sig
• Tp sens 2 sig
• X177