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 MANUALSCADILLAC1999SEVILLE SLS V8-4.6L VIN YREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTHROTTLE POSITION SENSORSERVICE AND REPAIR
1999 Cadillac Seville SLS V8-4.6L VIN Y
Throttle Position Sensor: Service and Repair
1999 Cadillac Seville SLS V8-4.6L VIN YSECTION Service and Repair
REMOVAL PROCEDURE
1. Remove the rear seat cushion.
CAUTION: Refer to SIR Handling Caution in Cautions and Notices.
2. Disconnect the negative battery cable to avoid accidental starting of the engine.
3. Remove the Throttle Body Assembly.
4. Remove the TP sensor (1) mounting bolts (4) from the TP sensor.
5. Remove the TP sensor (1) from the throttle body.
INSTALLATION PROCEDURE
1. Install the TP sensor (1) on to the throttle body.
NOTE: Refer to Fastener Notice in Cautions and Notices.
Tighten
Tighten the TP sensor screws (4) to 2.3 N.m (20 lb in).
2. Reinstall the Throttle Body Assembly.
3. Connect the negative battery cable.
4. Reinstall the rear seat cushion.
Throttle Body And Coolant Pipes:
1. Remove the rear seat cushion.
CAUTION: Refer to SIR Handling Caution in Cautions and Notices.
2. Disconnect the negative battery cable to avoid accidental starting of the engine.
3. Remove the Throttle Body Assembly.
Description:
4. Remove the TP sensor (1) mounting bolts (4) from the TP sensor.
5. Remove the TP sensor (1) from the throttle body.
INSTALLATION PROCEDURE
Description:
1. Install the TP sensor (1) on to the throttle body.
NOTE: Refer to Fastener Notice in Cautions and Notices.
Tighten
Tighten the TP sensor screws (4) to 2.3 N.m (20 lb in).
2. Reinstall the Throttle Body Assembly.
3. Connect the negative battery cable.
4. Reinstall the rear seat cushion.
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.