Yukon/Denali 4WD V8-4.8L VIN V (2005)
Transmission Position Switch/Sensor: Adjustments
4L80-E/4L85-E
Park/Neutral Position Switch Adjustment
Important:
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The following procedure is for vehicles that have not had the park/neutral position (PNP) switch removed or replaced. If the switch has been
removed or replaced, refer to Park/Neutral Position Switch Replacement for the proper adjustment procedure.
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Apply the park brake.
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The engine must start in the park (P) or neutral (N) positions only.
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Check the PNP switch for proper operation. If adjustment is required, proceed as follows:
1. Place the shift lever in the neutral (N) position.
2. With an assistant in the drivers seat, raise and suitably support the vehicle. Refer to Vehicle Lifting.
3. Loosen the PNP switch bolts.
4. With the vehicle in neutral (N), rotate the PNP switch while the assistant attempts to start the engine.
5. Following a successful start, turn the engine off.
6. Notice: Refer to Fastener Notice in Service Precautions.
Tighten the PNP switch bolts.
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Tighten the bolts to 25 Nm (18 ft. lbs.).
7. Lower the vehicle.
8. Check the PNP switch for proper operation. The engine must start in the park (P) or neutral (N) positions only.
9. Replace the PNP switch if proper operation can not be achieved.
