Automatic Transmission - 4L60-E/4L65-E (Service & Replacement): Adjustments Chevrolet Suburban X

Park/Neutral Position Switch Adjustment

Important

1. The following procedure is for vehicles that have not had the park/neutral position (PNP) switch removed or replaced. If the PNP switch has been removed or replaced, refer to «PARK/NEUTRAL POSITION SWITCH REPLACEMENT»(ref-180351-S42798647322005072700000) for the proper adjustment procedure.
2. Apply the park brake.
3. The engine must start in the park (P) or neutral (N) positions only.
4. Check the PNP switch for proper operation. If adjustment is required, proceed as follows

1. Place the transmission range selector in the neutral (N) position.
2. With an assistant in the drivers seat, raise and suitably support the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(ref-180627-S40085739202005072800000) in General Information.
3. Loosen the park/neutral position (PNP) switch bolts.
4. With the vehicle in the neutral (N) position, rotate the switch while the assistant attempts to start the engine.
5. Following a successful start, turn the engine off. NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices.
6. Tighten the PNP switch bolts. Tighten Tighten the bolts to 25 N.m (18 lb ft).
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. Refer to «PARK/NEUTRAL POSITION SWITCH REPLACEMENT»(ref-180351-S42798647322005072700000) .