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
$43.51 MSRP: $90.34
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Ships in 1-2 Business Days
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Product Specifications
- Replaces: 12694725, 12644228, 12594942, 12701247
- 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, Turbo Air Press
Part Number: 55493530
$9.50 MSRP: $15.72
You Save: $6.22 (40%)
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Product Specifications
- Other Name: Boost Sensor, Map Sensor, Pressure Sensor, Sensor
- Replaced by: 12694431
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021-2025 Chevrolet Trailblazer | 4 DOOR EXT, LEVEL II 4 DOOR EXTENDED, LEVEL III 4DOOR EXTENDED, LEVEL IV 4 DOOR EXTENDED, LEVEL V 4 DOOR EXTENDED | 3 Cyl 1.2L, 3 Cyl 1.3L
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Chevrolet Trailblazer SENSOR ASM,MAP
Part Number: 19418808
$72.39 MSRP: $143.62
You Save: $71.23 (50%)
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Product Specifications
- Other Name: M.A.P. Sensor, Map Sensor, Valve Assembly
- Replaces: 16249939, 09359409, 12614973, 16187556, 9359409
- 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 ASM,MAP
Part Number: 19418807
$74.35 MSRP: $147.51
You Save: $73.16 (50%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: M.A.P. 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

Positive pressure in the intake manifold is also measured the MAP Sensor which is a very important device used in Chevrolet Trailblazer to ensure efficient fuel calibration; the information is processed by the engine control unit or commonly abbreviated as ECU. Currently, in the fuel injected engines, the MAP Sensor assists for the computation of the air density and the suitable air and fuel ratio to be mixed in burning, which makes it cores for the so called speed density method. As for the MAP or the MAF sensor, while naturally aspirated engines could have either of these, the forced induction engines require both to give correct conversions. Further, the MAP Sensor also plays a part in the on-board diagnostics concerning the EGR valve; with accurate measurements required for fuel flow regulation for performance enhancement.

Each OEM Chevrolet Trailblazer MAP Sensor we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.

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.