ENGINE PERFORMANCE – Chevrolet Silverado 2500 HD 2008 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.3L VIN X

4.3L VIN X, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Silverado 2500 HD 2008

List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Silverado 2500 HD 2008:

• (top left rear of engine)
• 4wd lo
• 5v ref1
• 5v ref2
• A/c cl ctl
• A/c pres sig
• Acc ser data
• Accelerator pedal position (app) sensor (above accelerator pedal)
• Air conditioning system
• Anti-lock brakes system
• App1 sig
• App2 sig
• Axl sw sig
• Cfan hi ctl
• Cfan lo ctl
• Computer data lines system
• Cooling fans system
• Engine control module (ecm) (left front of engine compt, near fan shroud)
• Evap vent
• Evaporative emissions (evap) canister vent solenoid valve (under rear of vehicle)
• Fp rly ctl
• Ftp sig
• Fuel lvl
• Fuel pmp relay
• Fuel pump fuse 20 20a
• Fuel tank pressure (ftp) sensor (on fuel pump & sender assembly)
• G106 (right rear of engine)
• G107
• G300 (below driver's door, on body mount)
• Gmlan (+)
• Gmlan (-)
• Gnd
• Heated oxygen sensor (ho2s) bank 1 sensor 2 (near left side of engine)
• Heated oxygen sensor (ho2s) bank 2 sensor 2 (near right side of engine)
• Ho2s hi b1s2
• Ho2s hi b2s2
• Ho2s ht b1s2
• Ho2s ht b2s2
• Ho2s lo b1s2
• Ho2s lo b2s2
• Hot at all times
• Iat sensor
• Iat sig
• Ig1
• Ign
• J105
• J106
• J331 (in chassis harness)
• Lo ref
• Maf
• Maf sig
• Mass air flow (maf)/intake air temperature (iat) sensor (right front of engine)
• Mil ctl
• Nca
• P/n sig
• Pnk
• Pnk b
• Primary fuel pump & sender assembly (inside fuel tank)
• Pwtn rly ctl
• Signal
• Starting/ charging system
• Strt rly ctl
• Tan
• Tan d
• Tan e
• Tcc sig
• Tos sig
• Transmissions system
• Transmissions system exterior lights system
• Underhood fuse block (left side of engine compt)
• Vss

4.3L VIN X, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Silverado 2500 HD 2008

List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Silverado 2500 HD 2008:

• Central sequential fuel injection (sfi) module (top rear of engine)
• Ecm- batt fuse 12 10a
• Ecm- ign fuse 56 15a
• Ecm/throt cont fuse 5 15a
• Eng fuse 4 15a
• Fuel injectors (top of left cylinder bank)
• Fuel injectors (top of right cylinder bank)
• Hot at all times
• Hot in run or start
• Inj-a fuse 24 20a
• J128 (in engine harness)
• O2-b snsr fuse 8 10a
• Pnk
• Pnk b
• Pnk d
• Pnk e
• Pnk h
• Pnk j
• Pnk l
• Pwr/ trn relay
• Tan
• Tan f
• Tcm- batt fuse 14 10a
• To o2-a snsr fuse (diagram 3 of 4)
• Underhood fuse block (left side of engine compt)

4.3L VIN X, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Silverado 2500 HD 2008

List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Silverado 2500 HD 2008:

• (lower left side of dash) left i/p junction block
• (upper left corner of dash)
• (w/ steering wheel heater) j220
• Aux hvac- ign fuse 48 1oa
• Brake fluid level switch (on master cylinder)
• Computer data lines system
• Engine oil pressure (eop) sensor (rear of engine)
• Engine oil pressure ind
• From inj-a fuse (diagram 2 of 4)
• G103 (on front of right cylinder head)
• G201
• Gnd
• Heated oxygen sensor (ho2s) bank 1 sensor 1 (near left side of engine)
• Heated oxygen sensor (ho2s) bank 2 sensor 1 (near right side of engine)
• Hot at all times
• Hot in run or start
• Ic1
• Ic2
• Ic3
• Ign
• Ign 1
• Ignition control module (icm) (rear of engine)
• Instrument panel cluster (ipc)
• Ipc fuse 46 10a
• Lo bus
• Lo ref
• Logic
• Malfunction indicator lamp
• Manifold absolute pressure (map) sensor (top rear of engine)
• Nca
• O2-a snsr fuse 18 10a
• Pnk
• Pnk f
• Tan
• Throttle body
• Underhood fuse block (left side of engine compt)

4.3L VIN X, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Silverado 2500 HD 2008

List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Silverado 2500 HD 2008:

• 5v ref1
• 5v ref2
• Camshaft position sensor
• Chg ind sig
• Ckp sig
• Cmp sig
• Crankshaft position sensor (front of engine, right of crank pulley)
• Ect sig
• Engine control module (ecm) (left front of engine compt, near fan shroud)
• Engine coolant temperature sensor (left side of engine)
• Evaporative emission (evap) canister purge solenoid valve (top left rear of engine)
• G106 (right rear of engine)
• Gen fdc sig
• Gnd
• Ho2s hi b1s1
• Ho2s hi b2s1
• Ho2s htr b1s1
• Ho2s htr b2s1
• Ho2s lo b1s1
• Ho2s lo b2s1
• Ic 1 ctrl
• Ic 2 ctrl
• Ic 3 ctrl
• Inj 1 ctrl
• Inj 2 ctrl
• Inj 3 ctrl
• Inj 4 ctrl
• Inj 5 ctrl
• Inj 6 ctrl
• J106
• Knock sensor 1 (lower left side of engine)
• Knock sensor 2 (lower right side of engine)
• Ks1 sig
• Ks2 sig
• Lo ref
• Map sig
• Oil press sig
• Pnk
• Red
• Sol ctrl
• Starting/ charging system
• Starting/charging system
• Tac mot ctl 1
• Tac mot ctl 2
• Tan
• Tp1 sig
• Tp2 sig

4.8L VIN C

4.8L VIN C, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Silverado 2500 HD 2008

List of elements for 4.8L VIN C, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Silverado 2500 HD 2008:

• (in chassis
• (on fuel pump & sender assembly)
• (or 821)
• 4wd lo sig
• 5v ref(ac)
• 5v ref1
• 5v ref2
• A/c cl ctl
• A/c pres sig
• Acc ser data
• Air conditioning system
• Anti-lock brakes system cooling fans system
• App1 sig
• App2 sig
• Axl sw sig
• Brk sw sig
• Cfan hi ctl
• Cfan lo ctl
• Computer data lines system
• Cooling fans system
• Engine control module (ecm) (left front of engine compt, near fan shroud)
• Evap vent
• Evaporative emissions (evap) canister vent solenoid valve (under rear of vehicle)
• Exterior lights system
• Front fuel pump & sender assembly (in front fuel tank)
• Ftp sig
• Fuel ctl
• Fuel lvl-pri
• Fuel tank pressure (ftp) sensor
• G103 (on front of right cylinder head)
• Gmlan (+)
• Gmlan (-)
• Gnd
• Harness)
• Heated oxygen sensor (ho2s) bank 1 sensor 2 (downstream of left catalytic converter)
• Heated oxygen sensor (ho2s) bank 2 sensor 2 (downstream of right catalytic converter)
• Ho2s hi b1s2
• Ho2s hi b2s2
• Ho2s ht b1s2
• Ho2s ht b2s2
• Ho2s lo b1s2
• Ho2s lo b2s2
• Iat sig
• Ig1
• J106
• J331
• Lo ref
• Maf sig
• Mil ctl
• Nca
• P/n sig
• Pnk
• Pwtn rly ctl
• Starting/ charging system
• Strt rly ctl
• Tan
• Tos sig or
• Transmissions system
• Vss
• Vss hi sig
• Vss lo sig

4.8L VIN C, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Silverado 2500 HD 2008

List of elements for 4.8L VIN C, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Silverado 2500 HD 2008:

• 5v ref
• Computer data lines system
• Ecm- ign fuse 56 15a
• Fscm fuse 21 20a
• Fscm shield
• Fuel ctl
• Fuel line pressure sensor (under left side of vehicle)
• Fuel pres
• Fuel system control module (fscm) (under rear of vehicle)
• G300 (below driver's door, on body mount)
• Gmlan (+)
• Gmlan (-)
• Gnd
• Hot at all times
• Hot in run or start
• Ig1
• J300
• Lo ref
• Pnk
• Pump (+)
• Ser data en
• Tan
• Underhood fuse block (left side of engine compt)

4.8L VIN C, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Silverado 2500 HD 2008

List of elements for 4.8L VIN C, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Silverado 2500 HD 2008:

• (front of engine) (6.0l & 6.2l) camshaft actuator solenoid
• (not used)
• Accelerator pedal position (app) sensor (above accelerator pedal)
• Ecm- batt fuse 12 10a
• Ecm/throt cont fuse 5 15a
• Eng fuse 4 15a
• Fuel injectors (top of left cylinder bank)
• Fuel injectors (top of right cylinder bank)
• G103 (on front of right cylinder head)
• Hot at all times
• Iat
• Inj-a fuse 24 20a
• Inj-b fuse 13 20a
• J106
• Maf
• Mass air flow (maf)/intake air temperature (iat) sensor (right front of engine compt)
• O2-b snsr fuse 8 10a
• Pnk
• Pnk a
• Pnk b
• Pwr/ trn relay
• Tan
• Tan b
• Tan e
• Tcm- batt fuse 14 10a
• To o2-a snsr fuse (diagram 4 of 5)
• Underhood fuse block (left side of engine compt)

4.8L VIN C, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Silverado 2500 HD 2008

List of elements for 4.8L VIN C, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Silverado 2500 HD 2008:

• (lower left side of dash) left i/p junction block
• (on front of right cylinder head)
• (on right side of engine oil pan) engine oil level switch
• (upper left corner of dash)
• (w/ steering wheel heater) j220
• Aux hvac- ign fuse 48 1oa
• Brake fluid level switch (on master cylinder)
• Camshaft position sensor (front of engine, above crank pulley)
• Computer data lines system
• Crankshaft position sensor (right rear of engine)
• Engine coolant temperature (ect) sensor (on top of engine)
• Engine oil pressure (eop) sensor (top rear of engine)
• Engine oil pressure ind
• From inj-b fuse (diagram 3 of 5)
• G103
• G201
• Gnd
• Heated oxygen sensor (ho2s) bank 1 sensor 1 (upstream of left catalytic converter)
• Heated oxygen sensor (ho2s) bank 2 sensor 1 (upstream of right catalytic converter)
• Hot at all times
• Hot in run or start
• Ign
• Ign 1
• Instrument panel cluster (ipc)
• Ipc fuse 46 10a
• J106
• Knock sensor 1 (lower left side of engine)
• Knock sensor 2 (lower right side of engine)
• Lo bus
• Logic
• Malfunction indicator lamp
• Manifold absolute pressure (map) sensor (on top of intake manifold)
• Nca
• O2-a snsr fuse 18 10a
• Pnk
• Tan
• Underhood fuse block (left side of engine compt)

4.8L VIN C, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Silverado 2500 HD 2008

List of elements for 4.8L VIN C, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Silverado 2500 HD 2008:

• (below intake manifold) (except 4.8l) valve lifter oil manifold (vlom) assembly
• (in ignition coil jumper harness, 5 cm from x111 breakout)
• (on intake manifold) evaporative emission (evap) canister purge solenoid valve
• (upper left side of engine)
• (upper right side of engine)
• 5v ref1
• 5v ref2
• A pnk
• Cam sol ctl
• Chg ind sig
• Ckp sig
• Cmp sig
• Ctrl
• Cyl off ctl 1
• Cyl off ctl 2
• Cyl off ctl 3
• Cyl off ctl 4
• Cylinder shutoff solenoid 1, cyl 1
• Cylinder shutoff solenoid 2, cyl 4
• Cylinder shutoff solenoid 3, cyl 6
• Cylinder shutoff solenoid 4, cyl 7
• E pnk
• Ect sig
• Engine control module (ecm) (left front of engine compt, near fan shroud)
• Eop sig
• G102 (on lower left front of engine)
• Gen fdc sig
• Gnd
• Ho2s hi b1s1
• Ho2s hi b2s1
• Ho2s ht b1s1
• Ho2s ht b2s1
• Ho2s lo b1s1
• Ho2s lo b2s1
• Ic 1 ctl
• Ic 2 ctl
• Ic 3 ctl
• Ic 4 ctl
• Ic 5 ctl
• Ic 6 ctl
• Ic 7 ctl
• Ic 8 ctl
• Ign
• Ignition coils
• Inj 1 ctl
• Inj 2 ctl
• Inj 3 ctl
• Inj 4 ctl
• Inj 5 ctl
• Inj 6 ctl
• Inj 7 ctl
• Inj 8 ctl
• J107
• J108
• J109
• J110
• J111
• J112
• Ks1 sig
• Ks2 sig
• Lo ref
• Map sig
• Nca
• Nca nca
• Oil lvl sw sig
• Pnk
• Pnk d
• Red c
• Ref lo
• Sol ctrl
• Spark plug
• Spark spark plug plug
• Starting/ charging system
• Starting/charging system
• Tac mot ctl 1
• Tac mot ctl 2
• Tan
• Throttle body
• Tp sens1 sig
• Tp sens2 sig

5.3L VIN 0

5.3L VIN 0, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Silverado 2500 HD 2008

List of elements for 5.3L VIN 0, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Silverado 2500 HD 2008:

• (below driver's door, on body mount)
• (below driver's door, on body mount) g300
• (in chassis harness)
• (on fuel pump & sender assembly)
• (on lower left front of engine) g102
• (or 821)
• 4wd lo sig
• 5v ref(ac)
• 5v ref1
• 5v ref2
• A/c cl ctl
• A/c pres sig
• Acc ser data
• Air conditioning system
• Anti-lock brakes system cooling fans system
• App1 sig
• App2 sig
• Axl sw sig
• Brk sw sig
• Cfan hi ctl
• Cfan lo ctl
• Computer data lines system
• Cooling fans system
• Engine control module (ecm) (left front of engine compt, near fan shroud)
• Evap vent
• Evaporative emissions (evap) canister vent solenoid valve (under rear of vehicle)
• Exterior lights system
• Ftp sig
• Fuel ctl
• Fuel ctl-sec
• Fuel lvl-pri
• Fuel lvl-sec
• Fuel pmp relay
• Fuel pump fuse 20 20a
• Fuel tank pressure (ftp) sensor
• G103 (on front of right cylinder head)
• G300
• Gmlan (+)
• Gmlan (-)
• Gnd
• Heated oxygen sensor (ho2s) bank 1 sensor 2 (downstream of left catalytic converter)
• Heated oxygen sensor (ho2s) bank 2 sensor 2 (downstream of right catalytic converter)
• Ho2s hi b1s2
• Ho2s hi b2s2
• Ho2s ht b1s2
• Ho2s ht b2s2
• Ho2s lo b1s2
• Ho2s lo b2s2
• Hot at all times
• Iat sig
• Ig1
• J106
• J300
• J331
• Lo ref
• Maf sig
• Mil ctl
• Nca
• P/n sig
• Pnk
• Primary fuel pump & sender assembly (inside fuel tank)
• Pwtn rly ctl
• Rear fuel pump & sender assembly (6.0l (vin k)) (in rear fuel tank)
• Secondary fuel pump (fp) relay (6.0l (vin k)) (left side of engine compt)
• Starting/ charging system
• Strt rly ctl
• Tan
• Transmissions system
• Underhood fuse block (left side of engine compt)
• Vss
• Vss high sig
• Vss lo sig

5.3L VIN 0, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Silverado 2500 HD 2008

List of elements for 5.3L VIN 0, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Silverado 2500 HD 2008:

• (front of engine) (6.0l (vin k)) camshaft actuator solenoid
• (not used)
• Accelerator pedal position (app) sensor (above accelerator pedal)
• Ecm- batt fuse 12 10a
• Ecm- ign fuse 56 15a
• Ecm/throt cont fuse 5 15a
• Eng fuse 4 15a
• Fuel injectors (top of left cylinder bank)
• Fuel injectors (top of right cylinder bank)
• G103 (on front of right cylinder head)
• Hot at all times
• Hot in run or start
• Iat
• Inj-a fuse 24 20a
• Inj-b fuse 13 20a
• J106
• Maf
• Mass air flow (maf)/intake air temperature (iat) sensor (right front of engine compt)
• O2-b snsr fuse 8 10a
• Pnk
• Pnk a
• Pnk b
• Pwr/ trn relay
• Tan
• Tan b
• Tan e
• Tcm- batt fuse 14 15a
• To o2-a snsr fuse 18 (diagram 3 of 4)
• Underhood fuse block (left side of engine compt)

5.3L VIN 0, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Silverado 2500 HD 2008

List of elements for 5.3L VIN 0, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Silverado 2500 HD 2008:

• (lower left side of dash) left i/p junction block
• (on front of right cylinder head)
• (on right side of engine oil pan) engine oil level switch
• (upper left corner of dash)
• (w/ steering wheel heater) j220
• Aux hvac- ign fuse 48 1oa
• Brake fluid level switch (on master cylinder)
• Camshaft position (cmp) sensor (front of engine, above crank pulley)
• Computer data lines system
• Crankshaft position (ckp) sensor (right rear of engine)
• Engine coolant temperature (ect) sensor (on top of engine)
• Engine oil pressure (eop) sensor (top rear of engine)
• Engine oil pressure ind
• From inj-b fuse 13 (diagram 2 of 4)
• G103
• G201
• Gnd
• Heated oxygen sensor (ho2s) bank 1 sensor 1 (upstream of left catalytic converter)
• Heated oxygen sensor (ho2s) bank 2 sensor 1 (upstream of right catalytic converter)
• Hot at all times
• Hot in run or start
• Ign
• Instrument panel cluster (ipc)
• Ipc fuse 46 10a
• J106
• Knock sensor 1 (lower left side of engine)
• Knock sensor 2 (lower right side of engine)
• Lo bus
• Logic
• Malfunction indicator lamp
• Manifold absolute pressure (map) sensor (on top of intake manifold)
• Nca
• O2-a snsr fuse 18 10a
• Pnk
• Tan
• Underhood fuse block (left side of engine compt)

5.3L VIN 0, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Silverado 2500 HD 2008

List of elements for 5.3L VIN 0, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Silverado 2500 HD 2008:

• (below intake manifold)
• (in ignition coil jumper harness, 5 cm from x111 breakout)
• (on intake manifold) evaporative emission (evap) canister purge solenoid valve
• (upper left side of engine)
• (upper right side of engine)
• 5v ref1
• 5v ref2
• A pnk
• Cam sol ctl
• Chg ind sig
• Ckp sig
• Cmp sig
• Ctrl
• Cyl off ctl 1
• Cyl off ctl 2
• Cyl off ctl 3
• Cyl off ctl 4
• Cylinder shutoff solenoid 1, cyl 1
• Cylinder shutoff solenoid 2, cyl 4
• Cylinder shutoff solenoid 3, cyl 6
• Cylinder shutoff solenoid 4, cyl 7
• E pnk
• Ect sig
• Engine control module (ecm) (left front of engine compt, near fan shroud)
• Eop sig
• G102 (on lower left front of engine)
• Gen fdc sig
• Gnd
• Ho2s hi b1s1
• Ho2s hi b2s1
• Ho2s ht b1s1
• Ho2s ht b2s1
• Ho2s lo b1s1
• Ho2s lo b2s1
• Ic 1 ctl
• Ic 2 ctl
• Ic 3 ctl
• Ic 4 ctl
• Ic 5 ctl
• Ic 6 ctl
• Ic 7 ctl
• Ic 8 ctl
• Ign
• Ignition coils
• Inj 1 ctl
• Inj 2 ctl
• Inj 3 ctl
• Inj 4 ctl
• Inj 5 ctl
• Inj 6 ctl
• Inj 7 ctl
• Inj 8 ctl
• J107
• J108
• J109
• J110
• J111
• J112
• Ks1 sig
• Ks2 sig
• Lo ref
• Map sig
• Nca
• Nca nca
• Oil lvl sw sig
• Pnk
• Pnk d
• Red c
• Ref lo
• Sol ctrl
• Spark plug
• Spark spark plug plug
• Starting/ charging system
• Starting/charging system
• Tac mot ctl 1
• Tac mot ctl 2
• Tan
• Throttle body
• Tp sens1 sig
• Tp sens2 sig
• Valve lifter oil manifold (vlom) assembly

5.3L VIN 3

5.3L VIN 3, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Silverado 2500 HD 2008

List of elements for 5.3L VIN 3, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Silverado 2500 HD 2008:

• (below driver's door, on body mount)
• (below driver's door, on body mount) g300
• (in chassis harness)
• (on fuel pump & sender assembly)
• (on lower left front of engine) g102
• (or 821)
• 4wd lo sig
• 5v ref(ac)
• 5v ref1
• 5v ref2
• A/c cl ctl
• A/c pres sig
• Acc ser data
• Air conditioning system
• Anti-lock brakes system cooling fans system
• App1 sig
• App2 sig
• Axl sw sig
• Brk sw sig
• Cfan hi ctl
• Cfan lo ctl
• Computer data lines system
• Cooling fans system
• Engine control module (ecm) (left front of engine compt, near fan shroud)
• Evap vent
• Evaporative emissions (evap) canister vent solenoid valve (under rear of vehicle)
• Exterior lights system
• Ftp sig
• Fuel ctl
• Fuel ctl-sec
• Fuel lvl-pri
• Fuel lvl-sec
• Fuel pmp relay
• Fuel pump fuse 20 20a
• Fuel tank pressure (ftp) sensor
• G103 (on front of right cylinder head)
• G300
• Gmlan (+)
• Gmlan (-)
• Gnd
• Heated oxygen sensor (ho2s) bank 1 sensor 2 (downstream of left catalytic converter)
• Heated oxygen sensor (ho2s) bank 2 sensor 2 (downstream of right catalytic converter)
• Ho2s hi b1s2
• Ho2s hi b2s2
• Ho2s ht b1s2
• Ho2s ht b2s2
• Ho2s lo b1s2
• Ho2s lo b2s2
• Hot at all times
• Iat sig
• Ig1
• J106
• J300
• J331
• Lo ref
• Maf sig
• Mil ctl
• Nca
• P/n sig
• Pnk
• Primary fuel pump & sender assembly (inside fuel tank)
• Pwtn rly ctl
• Rear fuel pump & sender assembly (6.0l (vin k)) (in rear fuel tank)
• Secondary fuel pump (fp) relay (6.0l (vin k)) (left side of engine compt)
• Starting/ charging system
• Strt rly ctl
• Tan
• Transmissions system
• Underhood fuse block (left side of engine compt)
• Vss
• Vss high sig
• Vss lo sig

5.3L VIN 3, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Silverado 2500 HD 2008

List of elements for 5.3L VIN 3, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Silverado 2500 HD 2008:

• (front of engine) (6.0l (vin k)) camshaft actuator solenoid
• (not used)
• Accelerator pedal position (app) sensor (above accelerator pedal)
• Ecm- batt fuse 12 10a
• Ecm- ign fuse 56 15a
• Ecm/throt cont fuse 5 15a
• Eng fuse 4 15a
• Fuel injectors (top of left cylinder bank)
• Fuel injectors (top of right cylinder bank)
• G103 (on front of right cylinder head)
• Hot at all times
• Hot in run or start
• Iat
• Inj-a fuse 24 20a
• Inj-b fuse 13 20a
• J106
• Maf
• Mass air flow (maf)/intake air temperature (iat) sensor (right front of engine compt)
• O2-b snsr fuse 8 10a
• Pnk
• Pnk a
• Pnk b
• Pwr/ trn relay
• Tan
• Tan b
• Tan e
• Tcm- batt fuse 14 15a
• To o2-a snsr fuse 18 (diagram 3 of 4)
• Underhood fuse block (left side of engine compt)

5.3L VIN 3, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Silverado 2500 HD 2008

List of elements for 5.3L VIN 3, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Silverado 2500 HD 2008:

• (lower left side of dash) left i/p junction block
• (on front of right cylinder head)
• (on right side of engine oil pan) engine oil level switch
• (upper left corner of dash)
• (w/ steering wheel heater) j220
• Aux hvac- ign fuse 48 1oa
• Brake fluid level switch (on master cylinder)
• Camshaft position (cmp) sensor (front of engine, above crank pulley)
• Computer data lines system
• Crankshaft position (ckp) sensor (right rear of engine)
• Engine coolant temperature (ect) sensor (on top of engine)
• Engine oil pressure (eop) sensor (top rear of engine)
• Engine oil pressure ind
• From inj-b fuse 13 (diagram 2 of 4)
• G103
• G201
• Gnd
• Heated oxygen sensor (ho2s) bank 1 sensor 1 (upstream of left catalytic converter)
• Heated oxygen sensor (ho2s) bank 2 sensor 1 (upstream of right catalytic converter)
• Hot at all times
• Hot in run or start
• Ign
• Instrument panel cluster (ipc)
• Ipc fuse 46 10a
• J106
• Knock sensor 1 (lower left side of engine)
• Knock sensor 2 (lower right side of engine)
• Lo bus
• Logic
• Malfunction indicator lamp
• Manifold absolute pressure (map) sensor (on top of intake manifold)
• Nca
• O2-a snsr fuse 18 10a
• Pnk
• Tan
• Underhood fuse block (left side of engine compt)

5.3L VIN 3, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Silverado 2500 HD 2008

List of elements for 5.3L VIN 3, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Silverado 2500 HD 2008:

• (below intake manifold)
• (in ignition coil jumper harness, 5 cm from x111 breakout)
• (on intake manifold) evaporative emission (evap) canister purge solenoid valve
• (upper left side of engine)
• (upper right side of engine)
• 5v ref1
• 5v ref2
• A pnk
• Cam sol ctl
• Chg ind sig
• Ckp sig
• Cmp sig
• Ctrl
• Cyl off ctl 1
• Cyl off ctl 2
• Cyl off ctl 3
• Cyl off ctl 4
• Cylinder shutoff solenoid 1, cyl 1
• Cylinder shutoff solenoid 2, cyl 4
• Cylinder shutoff solenoid 3, cyl 6
• Cylinder shutoff solenoid 4, cyl 7
• E pnk
• Ect sig
• Engine control module (ecm) (left front of engine compt, near fan shroud)
• Eop sig
• G102 (on lower left front of engine)
• Gen fdc sig
• Gnd
• Ho2s hi b1s1
• Ho2s hi b2s1
• Ho2s ht b1s1
• Ho2s ht b2s1
• Ho2s lo b1s1
• Ho2s lo b2s1
• Ic 1 ctl
• Ic 2 ctl
• Ic 3 ctl
• Ic 4 ctl
• Ic 5 ctl
• Ic 6 ctl
• Ic 7 ctl
• Ic 8 ctl
• Ign
• Ignition coils
• Inj 1 ctl
• Inj 2 ctl
• Inj 3 ctl
• Inj 4 ctl
• Inj 5 ctl
• Inj 6 ctl
• Inj 7 ctl
• Inj 8 ctl
• J107
• J108
• J109
• J110
• J111
• J112
• Ks1 sig
• Ks2 sig
• Lo ref
• Map sig
• Nca
• Nca nca
• Oil lvl sw sig
• Pnk
• Pnk d
• Red c
• Ref lo
• Sol ctrl
• Spark plug
• Spark spark plug plug
• Starting/ charging system
• Starting/charging system
• Tac mot ctl 1
• Tac mot ctl 2
• Tan
• Throttle body
• Tp sens1 sig
• Tp sens2 sig
• Valve lifter oil manifold (vlom) assembly

5.3L VIN J

5.3L VIN J, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Silverado 2500 HD 2008

List of elements for 5.3L VIN J, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Silverado 2500 HD 2008:

• (in chassis
• (on fuel pump & sender assembly)
• (or 821)
• 4wd lo sig
• 5v ref(ac)
• 5v ref1
• 5v ref2
• A/c cl ctl
• A/c pres sig
• Acc ser data
• Air conditioning system
• Anti-lock brakes system cooling fans system
• App1 sig
• App2 sig
• Axl sw sig
• Brk sw sig
• Cfan hi ctl
• Cfan lo ctl
• Computer data lines system
• Cooling fans system
• Engine control module (ecm) (left front of engine compt, near fan shroud)
• Evap vent
• Evaporative emissions (evap) canister vent solenoid valve (under rear of vehicle)
• Exterior lights system
• Front fuel pump & sender assembly (in front fuel tank)
• Ftp sig
• Fuel ctl
• Fuel lvl-pri
• Fuel tank pressure (ftp) sensor
• G103 (on front of right cylinder head)
• Gmlan (+)
• Gmlan (-)
• Gnd
• Harness)
• Heated oxygen sensor (ho2s) bank 1 sensor 2 (downstream of left catalytic converter)
• Heated oxygen sensor (ho2s) bank 2 sensor 2 (downstream of right catalytic converter)
• Ho2s hi b1s2
• Ho2s hi b2s2
• Ho2s ht b1s2
• Ho2s ht b2s2
• Ho2s lo b1s2
• Ho2s lo b2s2
• Iat sig
• Ig1
• J106
• J331
• Lo ref
• Maf sig
• Mil ctl
• Nca
• P/n sig
• Pnk
• Pwtn rly ctl
• Starting/ charging system
• Strt rly ctl
• Tan
• Tos sig or
• Transmissions system
• Vss
• Vss hi sig
• Vss lo sig

5.3L VIN J, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Silverado 2500 HD 2008

List of elements for 5.3L VIN J, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Silverado 2500 HD 2008:

• 5v ref
• Computer data lines system
• Ecm- ign fuse 56 15a
• Fscm fuse 21 20a
• Fscm shield
• Fuel ctl
• Fuel line pressure sensor (under left side of vehicle)
• Fuel pres
• Fuel system control module (fscm) (under rear of vehicle)
• G300 (below driver's door, on body mount)
• Gmlan (+)
• Gmlan (-)
• Gnd
• Hot at all times
• Hot in run or start
• Ig1
• J300
• Lo ref
• Pnk
• Pump (+)
• Ser data en
• Tan
• Underhood fuse block (left side of engine compt)

5.3L VIN J, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Silverado 2500 HD 2008

List of elements for 5.3L VIN J, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Silverado 2500 HD 2008:

• (front of engine) (6.0l & 6.2l) camshaft actuator solenoid
• (not used)
• Accelerator pedal position (app) sensor (above accelerator pedal)
• Ecm- batt fuse 12 10a
• Ecm/throt cont fuse 5 15a
• Eng fuse 4 15a
• Fuel injectors (top of left cylinder bank)
• Fuel injectors (top of right cylinder bank)
• G103 (on front of right cylinder head)
• Hot at all times
• Iat
• Inj-a fuse 24 20a
• Inj-b fuse 13 20a
• J106
• Maf
• Mass air flow (maf)/intake air temperature (iat) sensor (right front of engine compt)
• O2-b snsr fuse 8 10a
• Pnk
• Pnk a
• Pnk b
• Pwr/ trn relay
• Tan
• Tan b
• Tan e
• Tcm- batt fuse 14 10a
• To o2-a snsr fuse (diagram 4 of 5)
• Underhood fuse block (left side of engine compt)

5.3L VIN J, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Silverado 2500 HD 2008

List of elements for 5.3L VIN J, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Silverado 2500 HD 2008:

• (lower left side of dash) left i/p junction block
• (on front of right cylinder head)
• (on right side of engine oil pan) engine oil level switch
• (upper left corner of dash)
• (w/ steering wheel heater) j220
• Aux hvac- ign fuse 48 1oa
• Brake fluid level switch (on master cylinder)
• Camshaft position sensor (front of engine, above crank pulley)
• Computer data lines system
• Crankshaft position sensor (right rear of engine)
• Engine coolant temperature (ect) sensor (on top of engine)
• Engine oil pressure (eop) sensor (top rear of engine)
• Engine oil pressure ind
• From inj-b fuse (diagram 3 of 5)
• G103
• G201
• Gnd
• Heated oxygen sensor (ho2s) bank 1 sensor 1 (upstream of left catalytic converter)
• Heated oxygen sensor (ho2s) bank 2 sensor 1 (upstream of right catalytic converter)
• Hot at all times
• Hot in run or start
• Ign
• Ign 1
• Instrument panel cluster (ipc)
• Ipc fuse 46 10a
• J106
• Knock sensor 1 (lower left side of engine)
• Knock sensor 2 (lower right side of engine)
• Lo bus
• Logic
• Malfunction indicator lamp
• Manifold absolute pressure (map) sensor (on top of intake manifold)
• Nca
• O2-a snsr fuse 18 10a
• Pnk
• Tan
• Underhood fuse block (left side of engine compt)

5.3L VIN J, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Silverado 2500 HD 2008

List of elements for 5.3L VIN J, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Silverado 2500 HD 2008:

• (below intake manifold) (except 4.8l) valve lifter oil manifold (vlom) assembly
• (in ignition coil jumper harness, 5 cm from x111 breakout)
• (on intake manifold) evaporative emission (evap) canister purge solenoid valve
• (upper left side of engine)
• (upper right side of engine)
• 5v ref1
• 5v ref2
• A pnk
• Cam sol ctl
• Chg ind sig
• Ckp sig
• Cmp sig
• Ctrl
• Cyl off ctl 1
• Cyl off ctl 2
• Cyl off ctl 3
• Cyl off ctl 4
• Cylinder shutoff solenoid 1, cyl 1
• Cylinder shutoff solenoid 2, cyl 4
• Cylinder shutoff solenoid 3, cyl 6
• Cylinder shutoff solenoid 4, cyl 7
• E pnk
• Ect sig
• Engine control module (ecm) (left front of engine compt, near fan shroud)
• Eop sig
• G102 (on lower left front of engine)
• Gen fdc sig
• Gnd
• Ho2s hi b1s1
• Ho2s hi b2s1
• Ho2s ht b1s1
• Ho2s ht b2s1
• Ho2s lo b1s1
• Ho2s lo b2s1
• Ic 1 ctl
• Ic 2 ctl
• Ic 3 ctl
• Ic 4 ctl
• Ic 5 ctl
• Ic 6 ctl
• Ic 7 ctl
• Ic 8 ctl
• Ign
• Ignition coils
• Inj 1 ctl
• Inj 2 ctl
• Inj 3 ctl
• Inj 4 ctl
• Inj 5 ctl
• Inj 6 ctl
• Inj 7 ctl
• Inj 8 ctl
• J107
• J108
• J109
• J110
• J111
• J112
• Ks1 sig
• Ks2 sig
• Lo ref
• Map sig
• Nca
• Nca nca
• Oil lvl sw sig
• Pnk
• Pnk d
• Red c
• Ref lo
• Sol ctrl
• Spark plug
• Spark spark plug plug
• Starting/ charging system
• Starting/charging system
• Tac mot ctl 1
• Tac mot ctl 2
• Tan
• Throttle body
• Tp sens1 sig
• Tp sens2 sig

5.3L VIN M

5.3L VIN M, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Silverado 2500 HD 2008

List of elements for 5.3L VIN M, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Silverado 2500 HD 2008:

• (in chassis
• (on fuel pump & sender assembly)
• (or 821)
• 4wd lo sig
• 5v ref(ac)
• 5v ref1
• 5v ref2
• A/c cl ctl
• A/c pres sig
• Acc ser data
• Air conditioning system
• Anti-lock brakes system cooling fans system
• App1 sig
• App2 sig
• Axl sw sig
• Brk sw sig
• Cfan hi ctl
• Cfan lo ctl
• Computer data lines system
• Cooling fans system
• Engine control module (ecm) (left front of engine compt, near fan shroud)
• Evap vent
• Evaporative emissions (evap) canister vent solenoid valve (under rear of vehicle)
• Exterior lights system
• Front fuel pump & sender assembly (in front fuel tank)
• Ftp sig
• Fuel ctl
• Fuel lvl-pri
• Fuel tank pressure (ftp) sensor
• G103 (on front of right cylinder head)
• Gmlan (+)
• Gmlan (-)
• Gnd
• Harness)
• Heated oxygen sensor (ho2s) bank 1 sensor 2 (downstream of left catalytic converter)
• Heated oxygen sensor (ho2s) bank 2 sensor 2 (downstream of right catalytic converter)
• Ho2s hi b1s2
• Ho2s hi b2s2
• Ho2s ht b1s2
• Ho2s ht b2s2
• Ho2s lo b1s2
• Ho2s lo b2s2
• Iat sig
• Ig1
• J106
• J331
• Lo ref
• Maf sig
• Mil ctl
• Nca
• P/n sig
• Pnk
• Pwtn rly ctl
• Starting/ charging system
• Strt rly ctl
• Tan
• Tos sig or
• Transmissions system
• Vss
• Vss hi sig
• Vss lo sig

5.3L VIN M, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Silverado 2500 HD 2008

List of elements for 5.3L VIN M, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Silverado 2500 HD 2008:

• 5v ref
• Computer data lines system
• Ecm- ign fuse 56 15a
• Fscm fuse 21 20a
• Fscm shield
• Fuel ctl
• Fuel line pressure sensor (under left side of vehicle)
• Fuel pres
• Fuel system control module (fscm) (under rear of vehicle)
• G300 (below driver's door, on body mount)
• Gmlan (+)
• Gmlan (-)
• Gnd
• Hot at all times
• Hot in run or start
• Ig1
• J300
• Lo ref
• Pnk
• Pump (+)
• Ser data en
• Tan
• Underhood fuse block (left side of engine compt)

5.3L VIN M, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Silverado 2500 HD 2008

List of elements for 5.3L VIN M, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Silverado 2500 HD 2008:

• (front of engine) (6.0l & 6.2l) camshaft actuator solenoid
• (not used)
• Accelerator pedal position (app) sensor (above accelerator pedal)
• Ecm- batt fuse 12 10a
• Ecm/throt cont fuse 5 15a
• Eng fuse 4 15a
• Fuel injectors (top of left cylinder bank)
• Fuel injectors (top of right cylinder bank)
• G103 (on front of right cylinder head)
• Hot at all times
• Iat
• Inj-a fuse 24 20a
• Inj-b fuse 13 20a
• J106
• Maf
• Mass air flow (maf)/intake air temperature (iat) sensor (right front of engine compt)
• O2-b snsr fuse 8 10a
• Pnk
• Pnk a
• Pnk b
• Pwr/ trn relay
• Tan
• Tan b
• Tan e
• Tcm- batt fuse 14 10a
• To o2-a snsr fuse (diagram 4 of 5)
• Underhood fuse block (left side of engine compt)

5.3L VIN M, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Silverado 2500 HD 2008

List of elements for 5.3L VIN M, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Silverado 2500 HD 2008:

• (lower left side of dash) left i/p junction block
• (on front of right cylinder head)
• (on right side of engine oil pan) engine oil level switch
• (upper left corner of dash)
• (w/ steering wheel heater) j220
• Aux hvac- ign fuse 48 1oa
• Brake fluid level switch (on master cylinder)
• Camshaft position sensor (front of engine, above crank pulley)
• Computer data lines system
• Crankshaft position sensor (right rear of engine)
• Engine coolant temperature (ect) sensor (on top of engine)
• Engine oil pressure (eop) sensor (top rear of engine)
• Engine oil pressure ind
• From inj-b fuse (diagram 3 of 5)
• G103
• G201
• Gnd
• Heated oxygen sensor (ho2s) bank 1 sensor 1 (upstream of left catalytic converter)
• Heated oxygen sensor (ho2s) bank 2 sensor 1 (upstream of right catalytic converter)
• Hot at all times
• Hot in run or start
• Ign
• Ign 1
• Instrument panel cluster (ipc)
• Ipc fuse 46 10a
• J106
• Knock sensor 1 (lower left side of engine)
• Knock sensor 2 (lower right side of engine)
• Lo bus
• Logic
• Malfunction indicator lamp
• Manifold absolute pressure (map) sensor (on top of intake manifold)
• Nca
• O2-a snsr fuse 18 10a
• Pnk
• Tan
• Underhood fuse block (left side of engine compt)

5.3L VIN M, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Silverado 2500 HD 2008

List of elements for 5.3L VIN M, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Silverado 2500 HD 2008:

• (below intake manifold) (except 4.8l) valve lifter oil manifold (vlom) assembly
• (in ignition coil jumper harness, 5 cm from x111 breakout)
• (on intake manifold) evaporative emission (evap) canister purge solenoid valve
• (upper left side of engine)
• (upper right side of engine)
• 5v ref1
• 5v ref2
• A pnk
• Cam sol ctl
• Chg ind sig
• Ckp sig
• Cmp sig
• Ctrl
• Cyl off ctl 1
• Cyl off ctl 2
• Cyl off ctl 3
• Cyl off ctl 4
• Cylinder shutoff solenoid 1, cyl 1
• Cylinder shutoff solenoid 2, cyl 4
• Cylinder shutoff solenoid 3, cyl 6
• Cylinder shutoff solenoid 4, cyl 7
• E pnk
• Ect sig
• Engine control module (ecm) (left front of engine compt, near fan shroud)
• Eop sig
• G102 (on lower left front of engine)
• Gen fdc sig
• Gnd
• Ho2s hi b1s1
• Ho2s hi b2s1
• Ho2s ht b1s1
• Ho2s ht b2s1
• Ho2s lo b1s1
• Ho2s lo b2s1
• Ic 1 ctl
• Ic 2 ctl
• Ic 3 ctl
• Ic 4 ctl
• Ic 5 ctl
• Ic 6 ctl
• Ic 7 ctl
• Ic 8 ctl
• Ign
• Ignition coils
• Inj 1 ctl
• Inj 2 ctl
• Inj 3 ctl
• Inj 4 ctl
• Inj 5 ctl
• Inj 6 ctl
• Inj 7 ctl
• Inj 8 ctl
• J107
• J108
• J109
• J110
• J111
• J112
• Ks1 sig
• Ks2 sig
• Lo ref
• Map sig
• Nca
• Nca nca
• Oil lvl sw sig
• Pnk
• Pnk d
• Red c
• Ref lo
• Sol ctrl
• Spark plug
• Spark spark plug plug
• Starting/ charging system
• Starting/charging system
• Tac mot ctl 1
• Tac mot ctl 2
• Tan
• Throttle body
• Tp sens1 sig
• Tp sens2 sig

6.0L VIN Y

6.0L VIN Y, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Silverado 2500 HD 2008

List of elements for 6.0L VIN Y, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Silverado 2500 HD 2008:

• (in chassis
• (on fuel pump & sender assembly)
• (or 821)
• 4wd lo sig
• 5v ref(ac)
• 5v ref1
• 5v ref2
• A/c cl ctl
• A/c pres sig
• Acc ser data
• Air conditioning system
• Anti-lock brakes system cooling fans system
• App1 sig
• App2 sig
• Axl sw sig
• Brk sw sig
• Cfan hi ctl
• Cfan lo ctl
• Computer data lines system
• Cooling fans system
• Engine control module (ecm) (left front of engine compt, near fan shroud)
• Evap vent
• Evaporative emissions (evap) canister vent solenoid valve (under rear of vehicle)
• Exterior lights system
• Front fuel pump & sender assembly (in front fuel tank)
• Ftp sig
• Fuel ctl
• Fuel lvl-pri
• Fuel tank pressure (ftp) sensor
• G103 (on front of right cylinder head)
• Gmlan (+)
• Gmlan (-)
• Gnd
• Harness)
• Heated oxygen sensor (ho2s) bank 1 sensor 2 (downstream of left catalytic converter)
• Heated oxygen sensor (ho2s) bank 2 sensor 2 (downstream of right catalytic converter)
• Ho2s hi b1s2
• Ho2s hi b2s2
• Ho2s ht b1s2
• Ho2s ht b2s2
• Ho2s lo b1s2
• Ho2s lo b2s2
• Iat sig
• Ig1
• J106
• J331
• Lo ref
• Maf sig
• Mil ctl
• Nca
• P/n sig
• Pnk
• Pwtn rly ctl
• Starting/ charging system
• Strt rly ctl
• Tan
• Tos sig or
• Transmissions system
• Vss
• Vss hi sig
• Vss lo sig

6.0L VIN Y, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Silverado 2500 HD 2008

List of elements for 6.0L VIN Y, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Silverado 2500 HD 2008:

• 5v ref
• Computer data lines system
• Ecm- ign fuse 56 15a
• Fscm fuse 21 20a
• Fscm shield
• Fuel ctl
• Fuel line pressure sensor (under left side of vehicle)
• Fuel pres
• Fuel system control module (fscm) (under rear of vehicle)
• G300 (below driver's door, on body mount)
• Gmlan (+)
• Gmlan (-)
• Gnd
• Hot at all times
• Hot in run or start
• Ig1
• J300
• Lo ref
• Pnk
• Pump (+)
• Ser data en
• Tan
• Underhood fuse block (left side of engine compt)

6.0L VIN Y, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Silverado 2500 HD 2008

List of elements for 6.0L VIN Y, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Silverado 2500 HD 2008:

• (front of engine) (6.0l & 6.2l) camshaft actuator solenoid
• (not used)
• Accelerator pedal position (app) sensor (above accelerator pedal)
• Ecm- batt fuse 12 10a
• Ecm/throt cont fuse 5 15a
• Eng fuse 4 15a
• Fuel injectors (top of left cylinder bank)
• Fuel injectors (top of right cylinder bank)
• G103 (on front of right cylinder head)
• Hot at all times
• Iat
• Inj-a fuse 24 20a
• Inj-b fuse 13 20a
• J106
• Maf
• Mass air flow (maf)/intake air temperature (iat) sensor (right front of engine compt)
• O2-b snsr fuse 8 10a
• Pnk
• Pnk a
• Pnk b
• Pwr/ trn relay
• Tan
• Tan b
• Tan e
• Tcm- batt fuse 14 10a
• To o2-a snsr fuse (diagram 4 of 5)
• Underhood fuse block (left side of engine compt)

6.0L VIN Y, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Silverado 2500 HD 2008

List of elements for 6.0L VIN Y, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Silverado 2500 HD 2008:

• (lower left side of dash) left i/p junction block
• (on front of right cylinder head)
• (on right side of engine oil pan) engine oil level switch
• (upper left corner of dash)
• (w/ steering wheel heater) j220
• Aux hvac- ign fuse 48 1oa
• Brake fluid level switch (on master cylinder)
• Camshaft position sensor (front of engine, above crank pulley)
• Computer data lines system
• Crankshaft position sensor (right rear of engine)
• Engine coolant temperature (ect) sensor (on top of engine)
• Engine oil pressure (eop) sensor (top rear of engine)
• Engine oil pressure ind
• From inj-b fuse (diagram 3 of 5)
• G103
• G201
• Gnd
• Heated oxygen sensor (ho2s) bank 1 sensor 1 (upstream of left catalytic converter)
• Heated oxygen sensor (ho2s) bank 2 sensor 1 (upstream of right catalytic converter)
• Hot at all times
• Hot in run or start
• Ign
• Ign 1
• Instrument panel cluster (ipc)
• Ipc fuse 46 10a
• J106
• Knock sensor 1 (lower left side of engine)
• Knock sensor 2 (lower right side of engine)
• Lo bus
• Logic
• Malfunction indicator lamp
• Manifold absolute pressure (map) sensor (on top of intake manifold)
• Nca
• O2-a snsr fuse 18 10a
• Pnk
• Tan
• Underhood fuse block (left side of engine compt)

6.0L VIN Y, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Silverado 2500 HD 2008

List of elements for 6.0L VIN Y, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Silverado 2500 HD 2008:

• (below intake manifold) (except 4.8l) valve lifter oil manifold (vlom) assembly
• (in ignition coil jumper harness, 5 cm from x111 breakout)
• (on intake manifold) evaporative emission (evap) canister purge solenoid valve
• (upper left side of engine)
• (upper right side of engine)
• 5v ref1
• 5v ref2
• A pnk
• Cam sol ctl
• Chg ind sig
• Ckp sig
• Cmp sig
• Ctrl
• Cyl off ctl 1
• Cyl off ctl 2
• Cyl off ctl 3
• Cyl off ctl 4
• Cylinder shutoff solenoid 1, cyl 1
• Cylinder shutoff solenoid 2, cyl 4
• Cylinder shutoff solenoid 3, cyl 6
• Cylinder shutoff solenoid 4, cyl 7
• E pnk
• Ect sig
• Engine control module (ecm) (left front of engine compt, near fan shroud)
• Eop sig
• G102 (on lower left front of engine)
• Gen fdc sig
• Gnd
• Ho2s hi b1s1
• Ho2s hi b2s1
• Ho2s ht b1s1
• Ho2s ht b2s1
• Ho2s lo b1s1
• Ho2s lo b2s1
• Ic 1 ctl
• Ic 2 ctl
• Ic 3 ctl
• Ic 4 ctl
• Ic 5 ctl
• Ic 6 ctl
• Ic 7 ctl
• Ic 8 ctl
• Ign
• Ignition coils
• Inj 1 ctl
• Inj 2 ctl
• Inj 3 ctl
• Inj 4 ctl
• Inj 5 ctl
• Inj 6 ctl
• Inj 7 ctl
• Inj 8 ctl
• J107
• J108
• J109
• J110
• J111
• J112
• Ks1 sig
• Ks2 sig
• Lo ref
• Map sig
• Nca
• Nca nca
• Oil lvl sw sig
• Pnk
• Pnk d
• Red c
• Ref lo
• Sol ctrl
• Spark plug
• Spark spark plug plug
• Starting/ charging system
• Starting/charging system
• Tac mot ctl 1
• Tac mot ctl 2
• Tan
• Throttle body
• Tp sens1 sig
• Tp sens2 sig