ENGINE PERFORMANCE – Chevrolet Blazer 2005 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.3L VIN X

4.3L VIN X, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Blazer 2005

List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Blazer 2005:

• (not used)
• (rear of distributor) camshaft position sensor (cmp)
• 12v ref
• 3-2 sol
• 5 v ref
• 5v ref
• Abs fuse 22 10a
• Battery
• C red
• Ckp sig
• Class 2 data
• Clstr fuse 11 10a
• Clutch pedal position switch (on clutch pedal support bracket)
• Cmp sens
• Cpp sw
• Crankshaft position sensor (ckp) (on front of engine, near crankshaft pulley)
• Ect sens
• G103 (on rear of right cylinder head)
• G105 (on rear of left cylinder head)
• G105 (on rear of left cylinder head)
• Ground
• Heated oxygen sensor (bank 1 sensor 1) (in left exhaust pipe, in front of catalytic converter)
• Heated oxygen sensor (bank 1 sensor 2) (in exhaust system, after catalytic converter)
• Heated oxygen sensor (bank 2 sensor 1) (in right exhaust pipe, in front of catalytic converter)
• Ho2s high
• Ho2s low
• Hot in off, run or start
• Hot in run
• I/p fuse block
• Ign 1
• Inj 1
• Inj 2
• Inj 3
• Inj 4 ctrl
• Inj 5
• Inj 6
• Knock sensor (ks) (on top rear of engine)
• Ks sig
• Low ref
• Nca
• Off/crk/run
• P/n
• Park/neutral position switch (on left side of transmission)
• Pnk
• Powertrain control module (pcm) (on right side of engine compt)
• Red
• S100
• S106
• S116
• S138
• S152
• S203
• Stoplamp switch (on brake pedal support bracket)
• Tan
• Tcc sw
• Trans sig a
• Trans sw b
• Trans sw c
• Trans sw p

4.3L VIN X, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Blazer 2005

List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Blazer 2005:

• 1-2 shift sol
• 2-3 shift sol
• 3-2 shift sol
• A10
• Automatic transmission
• Automatic transmission fluid pressure manual valve position switch
• B10
• C10
• Central sequential fuel injection (top right center of engine, forward of distributor)
• D10
• D2 sw
• D3 sw
• D4 sw
• E10
• Ecm b fuse 20a
• Ecm i fuse 15a
• Eng i fuse 10a
• Evaporative emission canister purge solenoid (top right center of engine)
• Evaporative emission canister vent solenoid (rear of fuel tank)
• Fuel inj
• Hot at all times
• Hot in run or start
• Lo sw
• Oxygen fuse 20a
• Pnk
• Pressure control solenoid valve
• Red
• Rev sw
• S133
• Tan
• Tcc pwm sol
• Tcc sol
• Transmission fluid temperature sensor
• Underhood fuse block (on top of left front inner wheelwell)

4.3L VIN X, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Blazer 2005

List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Blazer 2005:

• (under left side of dash) data link connector
• 12v in
• A11
• A12
• Body control module (under dash, on heater case)
• Ecm b fuse 20a
• Eng spd
• Engine coolant temperature (ect) sensor (left cylinder head, between two rear spark plugs)
• Fuel pump & sender assembly (mounted in top of fuel tank assembly)
• Fuel pump prime connector
• Fuel pump relay
• Fuel tank pressure sensor (at top of fuel tank)
• G102 (on rear of right cylinder head)
• G105 (on rear of left cylinder head)
• G402 (on left rear frame rail)
• Gnd
• Hot at all times
• Instrument cluster
• Instrument cluster system
• Intake air temperature sensor (left front of engine compt, fresh air intake duct)
• Maf sig
• Manifold absolute pressure (maf) sensor (on top center of engine)
• Mass airflow sensor (maf) (on air intake assembly)
• Mil input
• Pnk
• Red
• S152
• S422 (in chassis harness, 8 cm from fuel pump & sender assembly breakout toward breakout for c104)
• S423
• Splice pack 201 (near body relay block)
• Tan
• Tan b
• Throttle position (tp) sensor (on throttle body assembly)
• Underhood fuse block (on top of left front inner wheelwell)

4.3L VIN X, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Blazer 2005

List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Blazer 2005:

• (not used)
• (on rear of right cylinder head) g103
• 1-2 shift
• 12 v ref
• 2-3 shift
• 2wd
• 4wd
• A/c clu
• A/c low
• A/c req
• Air conditioning system
• Anti-lock brakes system
• Axle sw
• C116 (m-m)
• Cruise control system
• Cruise eng
• Distributor
• Engine spd
• Evap purge
• Evap vent
• Fuel lev
• Fuel pmp rly
• G104 (on rear of left cylinder head)
• G105 (on rear of left cylinder head)
• G117 (on left rear of engine compt, near cruise control module)
• Gen f
• Gen t/o
• Ground
• H02s htr low
• High voltage coil wire
• Ho2s htr high
• Ho2s htr low
• Iac a hi
• Iac a lo
• Iac b hi
• Iac b lo
• Iat sens
• Ic timing
• Idle air control valve (on throttle body assembly)
• Ign timing sig.
• Ignition coil (top rear of engine)
• Ignition control module (on top right side of engine)
• Ignition feed
• Low ref
• Maf sig
• Map sig
• Mil
• Nca
• Pc sol
• Pnk
• Pnk a
• Powertrain control module (pcm) (on right side of engine compt)
• Red
• S106
• S134
• S140
• S152
• Spark plugs
• Starting/charging system
• Tach. sig.
• Tan
• Tank pres
• Tcc pwm sol
• Tcc sol
• Tft sensor
• Tp sens
• Trans sig a
• Trans sig c
• Transmissions system
• Vehicle speed sensor (on side of transfer case)
• Vss
• Vss hi
• Vss low