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 MANUALSCHEVROLET1991BLAZER FULL SIZE V8-350 5.7LREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINDIFFERENTIAL ASSEMBLYDIFFERENTIAL LOCKPOSITION SENSOR/SWITCHSERVICE AND REPAIR
1991 Chevrolet Blazer Full Size V8-350 5.7L
Position Sensor/Switch: Service and Repair
1991 Chevrolet Blazer Full Size V8-350 5.7LSECTION Service and Repair
Remove or Disconnect
1. Skid plate (if equipped).
2. Electrical connector from the indicator switch located on the upper right side of the differential.
3. Indicator switch (11).
Install or Connect
1. Indicator switch (11).
^ Coat the switch thread with sealer (GM P/N 1052942) or equivalent.
2. Electrical connector.
3. Skid plate (if equipped).
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.