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.
2006 Hummer H2 V8-6.0LFACTORY OEM SERVICE PROCEDURE
Transmission Position Sensor/Switch: Service and Repair
Park/Neutral Position Switch Replacement
^ Tools Required
- J 41364-A Park/Neutral Switch Aligner
Removal Procedure
1. Apply the parking brake.
2. Shift the transmission into neutral.
3. Raise the vehicle. Refer to Vehicle Lifting.
4. Remove the nut securing the transmission control lever to the manual shaft.
5. Remove the transmission control lever from the manual shaft.
6. Disconnect the electrical connectors from the switch.
7. Remove the bolts securing the park/neutral position switch to the transmission.
8. Remove the park/neutral position switch from the manual shaft. If the park/neutral position switch did not slide off the manual shaft, file the outer edge of the manual shaft in order to remove any burrs.
Installation Procedure
1. Install the switch to the transmission manual shaft by aligning the switch hub flats with the manual shaft flats.
2. Slide the switch onto the transmission manual shaft until the switch mounting bracket contacts the mounting bosses on the transmission.
3. Important: If a new switch is being installed, the switch will come with a positive assurance bracket. The positive assurance bracket aligns the new switch in it proper position for installation and the use of neutral position adjustment tool will not be necessary.
Install the switch to the transmission with two bolts finger tight.
4. Position the tool J 41364-A onto the park/neutral position switch. Ensure that the two slots on the switch where the manual shaft is inserted are lined up with the lower two tabs on the tool.
5. Notice: Refer to Fastener Notice in Service Precautions.
Rotate the tool until the upper locator pin on the tool is lined up with the slot on the top of the switch.
^ Tighten the bolts securing the switch to 25 Nm (18 ft. lbs.).
6. Remove the J 41364-A from the switch. If installing a new switch, remove the positive assurance bracket at this time.
7. Connect the electrical connectors to the switch.
8. Install the transmission control lever to the manual shaft with the nut.
^ Tighten the control lever nut to 25 Nm (18 ft. lbs.).
9. Lower the vehicle.
10. Check the switch for proper operation. The engine must start in the P (Park) or N (Neutral) positions only. If proper operation of the switch can not be obtained, replace the switch.
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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