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 MANUALSCHEVROLET1994K 2500 SUBURBAN 4WD V8-454 7.4LREPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULEDIAGRAMSPINOUT AND TERMINAL ID WITH PCM
1994 Chevrolet K 2500 Suburban 4WD V8-454 7.4L
Pinout and Terminal ID with PCM
1994 Chevrolet K 2500 Suburban 4WD V8-454 7.4LSECTION Pinout and Terminal ID with PCM
PCM Connector Terminal End View (Part 2 of 4):
A1 = SYSTEM GROUND.
A2 = SYSTEM 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 "2" CONTROL.
A10 = OXYGEN SENSOR SIGNAL.
A12 = OXYGEN SENSOR GROUND.
A14 = DIAGNOSTIC TEST TERMINAL.
A15 = TPS SIGNAL.
A16 = INJECTOR "1" CONTROL.
PCM Connector Terminal End View (Part 3 of 4):
B2 = IC BYPASS.
B3 = SENSOR GROUND.
B4 = SENSOR GROUND/ MAP, EGR, TRANSMISSION.
B5 = TFT SIGNAL.
B8 = ECT SIGNAL.
B12 = FUEL PUMP SIGNAL.
B13 = MAP SIGNAL.
B15 = KNOCK SIGNAL.
B16 = EGR PINTLE POSITION.
PCM Connector Terminal End View (Part 4 of 4):
E1 = EGR CONTROL.
E4 = RANGE SIGNAL "B".
E5 = RANGE SIGNAL "C".
E6 = MIL CONTROL.
E8 = 2-3 SHIFT SOLENOID CONTROL.
E9 = 1-2 SHIFT SOLENOID CONTROL.
E10 = IDLE SPEED ACTUATOR CONTROL.
E11 = TCC SOLENOID CONTROL.
E12 = A/C SIGNAL.
E13 = BRAKE SIGNAL.
E14 = MAP, LINEAR EGR REFERENCE.
E15 = IGNITION FEED.
E16 = BATTERY FEED.
On-Board Diagnostic System Check:
F1 = RANGE SIGNAL "A".
F2 = INPUT SPEED SIGNAL HIGH.
F3 = INPUT SPEED SIGNAL LOW.
F6 = FUEL PUMP RELAY CONTROL.
F7 = PCS "LOW".
F9 = SERIAL DATA.
F10 = PCS "HIGH".
F11 = IC SIGNAL.
F12 = TRANSMISSION OUTPUT SPEED.
F13 = VSS SIGNAL.
F14 = TPS REFERENCE.
F15 = IGNITION FEED.
F16 = CANISTER PURGE SIGNAL.
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.