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 MANUALSGMC1999PICKUP C2500, 2D PICKUP, 7.4 J, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESPECIFICATIONSENGINE CONTROLS - SERVICE & ADJUSTMENT SPECIFICATIONSFUEL SYSTEMTHROTTLE POSITION (TP) SENSOR
1999 GMC Pickup C2500, 2D Pickup, 7.4 J, Standard
Throttle Position (TP) Sensor
1999 GMC Pickup C2500, 2D Pickup, 7.4 J, StandardSECTION Throttle Position (TP) Sensor
NOTE:
On 6.5L diesel engines, throttle control is electronic with NO mechanical link from engine to accelerator pedal. The PCM monitors the position of accelerator pedal based on signals from a nonadjustable Accelerator Pedal Position (APP) module. The APP module is mounted above the accelerator pedal.
THROTTLE POSITION (TP) SENSOR VOLTAGE (1)
| Application | Voltage | ||||
|---|---|---|---|---|---|
| 1.6L | .50-.80 | ||||
| 2.0L | (2) | ||||
| 2.2L | .20-.90 | ||||
| 3.4L | .20-.74 | ||||
| 4.3L | .47 | ||||
| 4.8L, 5.3L & 6.0L | .40-.90 | ||||
| 5.0L & 5.7L | .51 | ||||
| 7.4L | .47 | ||||
|
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RENDER: 1.0x
NO RELATED
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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.