2007 Hummer H2 V8-6.0LFACTORY OEM SERVICE PROCEDURE

Transmission Position Sensor/Switch: Adjustments



Park/Neutral Position Switch Adjustment

Important:
* The following procedure is for vehicles that have not had the switch removed or replaced. If the switch has been removed or replaced, refer to Park/Neutral Position Switch Replacement

* Apply the parking brake.

* The engine must start in the P (Park) or N (Neutral) positions only.

* Check the switch for proper operation. If adjustment is required, proceed as follows:

1. Place the transmission range selector in the N (Neutral) position.
2. With an assistant in the drivers seat, raise the vehicle. Refer to Vehicle Lifting.
3. Loosen the park/neutral position switch mounting bolts.
4. With the vehicle in the N (Neutral) position, rotate the switch while the assistant attempts to start the engine.
5. Following a successful start, turn the engine off.

Notice: Refer to Fastener Notice.

6. Tighten the bolts securing the switch to the transmission.

Tighten the bolts to 25 N.m (18 lb ft).

7. Lower the vehicle.
8. Check the switch for proper operation. The engine must start in the P (Park) or N (Neutral) positions only.
9. Replace the park/neutral position switch if proper operation can not be achieved.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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