What is the purpose and function of the Vehicle Speed Sensor (VSS) on Chevrolet Trailblazer?

The Vehicle Speed Sensor (VSS) is a permanent magnet generator mounted on the transmission. It is triggered by a toothed rotor on the transmission output shaft. As the output shaft rotates, the sensor produces an AC voltage, the frequency of which is proportional to vehicle speed. The PCM uses the sensor input signal for several different engine, transmission and radio control functions. The VSS signal also drives the speedometer on the instrument panel. A defective VSS can cause various driveability and transmission problems. To replace it, raise the vehicle and support it securely on jackstands. Disconnect the electrical connector from the VSS. Remove the mounting bolt and withdraw the VSS from the transmission case. Replace the sensor O-ring and lubricate it with clean transmission fluid. Installation is the reverse of removal.

Genuine Chevrolet Trailblazer Vehicle Speed Sensor

VSS

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8 Vehicle Speed Sensors found

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Chevrolet Trailblazer Sensor Asm,Vehicle Speed
Part Number: 19302667
- Other Name: SENSOR, Speedometer Drive; Vehicle Speed Sensor
- Replaces: 12376520, 88984527
$41.32 MSRP: $81.97
You Save: $40.65 (50%)

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Fits the following Vehicles:
2002-2009 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L, 8 Cyl 5.3L, 8 Cyl 6.0L
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Chevrolet Trailblazer Sensor Assembly, Automatic Transmission Input Speed
Part Number: 24244544
- Other Name: SENSOR, Computer Control Sensors
- Replaces: 24235714, 24230675, 24237866, 24240149
$54.39 MSRP: $107.88
You Save: $53.49 (50%)

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Fits the following Vehicles:
2006-2009 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L, 8 Cyl 5.3L, 8 Cyl 6.0L
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Chevrolet Trailblazer Sensor Assembly, Vehicle Speed
Part Number: 24225896
- Other Name: SENSOR, Speedometer Drive; Speed Sensor, Vehicle Speed Sensor
- Replaces: 10456194, 10456520
$23.81 MSRP: $39.40
You Save: $15.59 (40%)

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Fits the following Vehicles:
2002-2009 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L, 8 Cyl 5.3L, 8 Cyl 6.0L
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Chevrolet Trailblazer Sensor Assembly, A/Trns Output Spd
Part Number: 24295280
- Other Name: Output Sensor
- Replaces: 24289782, 24284725
$6.86 MSRP: $11.35
You Save: $4.49 (40%)

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Fits the following Vehicles:
2021 Chevrolet Trailblazer | 4 DOOR EXT | 3 Cyl 1.2L, 3 Cyl 1.3L
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Chevrolet Trailblazer Sensor Assembly, Automatic Transmission Input Speed
Part Number: 24279771
- Other Name: Sensor Assembly, A/Trns Input Spd; Input Sensor
- Replaced by: 24298199
$9.52 MSRP: $15.75
You Save: $6.23 (40%)

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Fits the following Vehicles:
2021 Chevrolet Trailblazer | 4 DOOR EXT | 3 Cyl 1.2L, 3 Cyl 1.3L
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Chevrolet Trailblazer Sensor Assembly, A/Trns Output Spd
Part Number: 24290536
- Other Name: Output Sensor
$18.22 MSRP: $29.05
You Save: $10.83 (38%)

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Fits the following Vehicles:
2021 Chevrolet Trailblazer | 4 DOOR EXT | 3 Cyl 1.2L, 3 Cyl 1.3L
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Chevrolet Trailblazer Sensor Assembly, A/Trns Inter Spd
Part Number: 24291277
$7.40 MSRP: $11.64
You Save: $4.24 (37%)

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Fits the following Vehicles:
2021 Chevrolet Trailblazer | 4 DOOR EXT | 3 Cyl 1.2L, 3 Cyl 1.3L
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Chevrolet Trailblazer Sensor Assembly, A/Trns Input Spd
Part Number: 24273916
- Other Name: Input Sensor
- Replaced by: 24287098
$12.41 MSRP: $19.54
You Save: $7.13 (37%)

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Fits the following Vehicles:
2021 Chevrolet Trailblazer | 4 DOOR EXT | 3 Cyl 1.2L, 3 Cyl 1.3L
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Chevrolet Trailblazer Vehicle Speed Sensor Parts Questions & Answers

Sensor Assembly, Vehicle Speed
24225896
Q: What is the purpose and function of the Vehicle Speed Sensor (VSS) on Chevrolet Trailblazer?
A: The Vehicle Speed Sensor (VSS) is a permanent magnet generator mounted on the transmission. It is triggered by a toothed rotor on the transmission output shaft. As the output shaft rotates, the sensor produces an AC voltage, the frequency of which is proportional to vehicle speed. The PCM uses the sensor input signal for several different engine, transmission and radio control functions. The VSS signal also drives the speedometer on the instrument panel. A defective VSS can cause various driveability and transmission problems. To replace it, raise the vehicle and support it securely on jackstands. Disconnect the electrical connector from the VSS. Remove the mounting bolt and withdraw the VSS from the transmission case. Replace the sensor O-ring and lubricate it with clean transmission fluid. Installation is the reverse of removal.