Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1993BLAZER FULL SIZE V8-350 5.7LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULEDIAGRAMSWITH 4L60-E TRANSMISSIONHARNESS CONNECTOR
1993 Chevrolet Blazer Full Size V8-350 5.7L
Harness Connector
1993 Chevrolet Blazer Full Size V8-350 5.7LSECTION Harness Connector
PCM Connector Terminal End View (Part 1 of 4):
A1 = PCM GROUND.
A2 = PCM GROUND.
A3 = IAC "A" HIGH.
A4 = IC REFERENCE HIGH.
A5 = IC REFERENCE LOW.
A6 = IAC "A" LOW.
A7 = IAC "B" LOW.
A8 = IAC "B" HIGH.
A9 = INJECTOR "B" CONTROL.
A10 = OXYGEN SENSOR SIGNAL.
A12 = OXYGEN SENSOR GROUND.
A14 = DIAGNOSTIC TEST TERMINAL.
A15 = TPS SIGNAL.
A16 = INJECTOR "A".
PCM Connector Terminal End View (Part 2 of 4):
B2 = IC BYPASS.
B3 = SENSOR GROUND.
B4 = SENSOR GROUND.
B5 = TRANSMISSION FLUID TEMPERATURE.
B8 = ECT SIGNAL.
B10 = CRUISE.
B12 = FUEL PUMP SIGNAL.
B13 = MAP SIGNAL.
B15 = KNOCK SENSOR SIGNAL.
B16 = EGR PINTLE.
PCM Connector Terminal End View (Part 3 of 4):
E1 = EGR SOLENOID.
E2 = 3-2 CONTROL SOLENOID.
E4 = RANGE SIGNAL "B".
E5 = RANGE SIGNAL "C"
E6 = MALFUNCTION INDICATOR LAMP.
E7 = AIR BYPASS VALVE.
E8 = 2-3 SHIFT SOLENOID ENABLE.
E9 = 1-2 SHIFT SOLENOID ENABLE.
E10 = TCC SOLENOID.
E12 = A/C REQUEST.
E13 = BRAKE SWITCH.
E14 = MAP, LINEAR EGR.
E15 = IGNITION FUSED.
E16 = BATTERY FEED.
PCM Connector Terminal End View (Part 4 of 4):
F1 = RANGE SIGNAL "A".
F6 = FUEL PUMP RELAY CONTROL.
F7 = PRESSURE CONTROL SOLENOID LOW.
F8 = 4WD LOW INDICATOR.
F9 = SERIAL DATA.
F10 = PRESSURE CONTROL SOLENOID HIGH.
F11 = IC SIGNAL.
F12 = TRANSMISSION OUTPUT SPEED.
F13 = VSS SIGNAL.
F14 = TPS 5 VOLT REFERENCE.
F15 = IGNITION FEED.
F16 = PURGE.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.