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 MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 66 (AUTOMATIC TRANSMISSION SERVICING)REMOVAL & INSTALLATIONPARK/NEUTRAL POSITION SWITCHINSTALLATION
1999 GMC Forward Control 5.7 R, Automatic
Park/Neutral Position Switch: Installation
1999 GMC Forward Control 5.7 R, AutomaticSECTION Installation
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet RV Cutaway, and 2002 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Position the alignment tool onto the PNP switch. See Fig 2 . Ensure the 2 slots on the switch where the manual shaft is inserted are lined up with the lower 2 tabs on the tool.
- Rotate the tool until the upper locator pin on the tool is lined up with the slot on the top of the switch. See Fig 2 . If the PNP switch did not slide off the manual shaft, file the outer edge of the manual shaft in order to remove any burrs.
- Install the switch to the transmission manual shaft by aligning the switch hub flats with the manual shaft flats. Slide the switch onto the transmission manual shaft until the switch mounting bracket contacts the mounting bosses on the transmission.
- Install the switch onto the transmission. Install the bolts and tighten to specification. See TORQUE SPECIFICATIONS .
- Remove the alignment tool. Install the wiring harness connector to the switch. Install the transmission control lever to the manual shaft with the nut and tighten to specification. See TORQUE SPECIFICATIONS .
- Lower the vehicle. Connect the negative battery cable. Check the switch for proper operation. The engine must start in the PARK and NEUTRAL positions only.
- If vehicle does not operate as specified, readjust the PNP switch.
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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.