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 MANUALSCHEVROLET1994C 2500 SUBURBAN 2WD V8-454 7.4LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSCOOLANT TEMPERATURE SENSOR/SWITCH (FOR COMPUTER)SERVICE AND REPAIR
1994 Chevrolet C 2500 Suburban 2WD V8-454 7.4L
Coolant Temperature Sensor/Switch (For Computer): Service and Repair
1994 Chevrolet C 2500 Suburban 2WD V8-454 7.4LSECTION Service and Repair
Engine Coolant Temperature (ECT) Sensor:
NOTICE: Care must be taken when handling engine coolant temperature sensor. Damage to the Engine Coolant Temperature (ECT) sensor will affect proper operation of the fuel injection system.
Removal
1. Disconnect negative battery cable.
2. Drain cooling system below level of sensor.
3. Disconnect electrical connector.
4. Remove Engine Coolant Temperature (ECT) sensor.
Installation
1. Install sensor in engine.
2. Connect electrical connector.
3. Refill cooling system.
4. Connect negative battery cable.
RENDER: 1.0x
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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.