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 69 (AUTOMATIC TRANSMISSION SERVICING)ADJUSTMENTSPARK/NEUTRAL POSITION SWITCH
1999 GMC Forward Control 5.7 R, Automatic
Park/Neutral Position Switch
1999 GMC Forward Control 5.7 R, AutomaticSECTION Park/Neutral Position Switch
WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
- If a new Park/Neutral Position (PNP) switch has been rotated and the pin is broken or if using an old PNP switch, adjust the PNP switch. Place the shift shaft in the Neutral position. Install the PNP switch to the mounting boss. See Fig 1 .
- Assemble the PNP switch mounting bolts loosely. Use the Park/Neutral Position Switch Alignment Tool (J-41545) to align the slots of the PNP switch to the Neutral position. See Fig 2 . Tighten the PNP switch mounting bolts to specification. See TORQUE SPECIFICATIONS .
NOTE:
If the PNP switch bolt holes do not align with the mounting boss on the transaxle, verify that the shaft is in the Neutral position.
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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.