What is the purpose of the Manifold Absolute Pressure (MAP) sensor on Chevrolet Trailblazer?

The Manifold Absolute Pressure (MAP) sensor checks for any variations in the intake manifold pressure due to the change of engine load and speed and translates this information into voltage output. The PCM reads this as a changing voltage signal from closed throttle (high vacuum) to wide open throttle (low vacuum). The PCM uses the MAP sensor to regulate fuel injection and ignition timing. On six-cylinder models, unplug MAP electrical connector. Unplug the MAP sensor electrical connector then squeeze its retainer tabs, remove its retainer, then pull it straight out of the manifold. Squeeze the sensor retainer inward, pull straight up and remove it. On V8 models, detach MAP electrical connector. Remove retaining clips and withdraw MAP sensor from upper intake manifold. Detach clips, remove MAP sensor from upper intake manifold. Replace upper intake manifold MAP sensor seal. Installation is like removal but reversed.

Genuine Chevrolet Trailblazer MAP Sensor

Manifold Air Pressure Sensor

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4 MAP Sensors found

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Chevrolet Trailblazer Sensor Assembly, Map
Part Number: 12711681
$42.36 MSRP: $87.96
You Save: $45.60 (52%)
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Product Specifications
- Replaces: 12594942, 12701247, 12644228, 12694725
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2009 Chevrolet Trailblazer | 4 DOOR | 6 Cyl 4.2L, 8 Cyl 5.3L, 8 Cyl 6.0L
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Chevrolet Trailblazer Sensor Assembly, Map
Part Number: 12614973
$70.48 MSRP: $139.84
You Save: $69.36 (50%)
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Map Sensor
- Replaced by: 19418808
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2008 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 8 Cyl 5.3L, 8 Cyl 6.0L
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Chevrolet Trailblazer Sensor Assembly, Turbo Air Press
Part Number: 55493530
$9.24 MSRP: $15.30
You Save: $6.06 (40%)
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Product Specifications
- Replaced by: 12694431
- Warranty: This genuine part is guaranteed by GM's factory warranty.
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 ASM,MAP
Part Number: 19418807
$72.40 MSRP: $143.63
You Save: $71.23 (50%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Manifold Absolute Pressure Sensor, Map Sensor
- Replaces: 12614970, 16212460
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2007 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L

Chevrolet Trailblazer MAP Sensor Parts Questions & Experts Answers

Sensor Assembly, Map
12711681
Q: What is the purpose of the Manifold Absolute Pressure (MAP) sensor on Chevrolet Trailblazer?
A: The Manifold Absolute Pressure (MAP) sensor checks for any variations in the intake manifold pressure due to the change of engine load and speed and translates this information into voltage output. The PCM reads this as a changing voltage signal from closed throttle (high vacuum) to wide open throttle (low vacuum). The PCM uses the MAP sensor to regulate fuel injection and ignition timing. On six-cylinder models, unplug MAP electrical connector. Unplug the MAP sensor electrical connector then squeeze its retainer tabs, remove its retainer, then pull it straight out of the manifold. Squeeze the sensor retainer inward, pull straight up and remove it. On V8 models, detach MAP electrical connector. Remove retaining clips and withdraw MAP sensor from upper intake manifold. Detach clips, remove MAP sensor from upper intake manifold. Replace upper intake manifold MAP sensor seal. Installation is like removal but reversed.