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.
1992 GMC Safari Van Cargo, 4.3 Z, AWDFACTORY OEM SERVICE PROCEDURE
Throttle Position Sensor
NOTE:
Throttle Position Sensor (TPS) is adjustable only on 2.8L (VIN R) and 6.2L Diesel engines. For further testing, see TESTS W/CODES
article in the ENGINE PERFORMANCE Section.
TPS ADJUSTMENT VOLTAGE
| Application | (1) Voltage | ||||
|---|---|---|---|---|---|
| 2.8L (VIN R) | .42-.45 | ||||
| 6.2L Diesel (VIN C & J) | (2) .63 | ||||
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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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