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Chevrolet Colorado MAF Sensor Replacement Guide
How to clean or change the mass air flow sensor in a 2nd generation 2015 to 2022 GM Chevy Colorado truck.

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2019 Colorado 3.6L V6
Engine Air Filter Box
MAF Sensor Location
This automotive maintenance tutorial was specifically written to assist owners of the second generation (2015, 2016, 2017, 2018, 2019, 2020, 2021 and 2022) GM Chevrolet Colorado truck in checking, cleaning or changing the MAF (mass air flow) sensor for the LFX or LGZ 3.6 liter V6 engine. The procedure should be the same or very similar for the Ecotec 2.5L turbocharged I4 engine or the Duramax 2.8L turbodiesel I4 engine.

Owners of other General Motors vehicles from Chevrolet, GMC, Cadillac, Buick and Holden such as the Trax, Equinox, Traverse, Blazer, Tahoe, Suburban, Sonic, Cruze, Trailblazer, Spark, Malibu, Impala, Volt, Bolt, Corvette, Camaro, Silverado, Express, Regal, LaCrosse, Cascada, Encore, Enclave, Envision, Canyon, Sierra, Terrain, Acadia, Yukon, XT4, XT5, XT6, Escalade, CT5, CTS, XTS, CT6, ATS, Astra and Commodore may also find these DIY instructions to be helpful.

Some of the symptoms of a dirty, failing or faulty MAF sensor include hard starting, rough idling, hesitating, surging, poor acceleration, hiccups, low fuel economy (lowered MPG), stalling, loss of power and misfiring. You might also see a CEL / SES (check engine light / service engine soon warning) on the gauge cluster. If you have an OBDII scanner it may reveal a MAF sensor related DTC (diagnostic trouble code) such as P0100, P0101, P0102, P0103 or P0104.

The OEM (original equipment manufacturer) mass air flow sensor in this 2019 Colorado LT with the 3.6L V6 engine was marked as part number ACDelco 23262343 (AFH70M-121 8227).

A few compatible replacement aftermarket sensors that are compatible with the LFX or LGZ 3.6L V6 engine with their part numbers include the following: Delphi AF10412, ECCPP MAF 20787043 and Standard MAS0323.

The only tool needed to remove and replace the sensor is a Torx T20 star bit screwdriver.

The first two steps are to open the hood and then move to the left (passenger) side of the engine bay.

Locate the black plastic rectangular shaped engine air filter box in front of the coolant overflow reservoir.

The MAF sensor is situated on the top of the black plastic air intake tube attached to the black rubber air intake hose.


Slide Out Red Lock Tab
Push In Release Tab
Power Plug Detached
Slide the red plastic locking tab out away from the MAF sensor to unlock the electrical connector.

Push in the release tab on the top of the electrical connector before pulling the power plug straight off the old sensor.

Loosen Counterclockwise
Remove Second Screw
Two Screws Removed
Loosen the two screws by turning them in the counterclockwise direction with a Torx T-20 star bit screwdriver.

Spin out the screws the last few turns with your fingers to prevent from having them fall down into the engine bay and become lost.

Set the two screws aside in a safe place.

Pull Out Old Sensor
Old Sensor Removed
Inspect Old Sensor
Carefully pull the old sensor straight out of the air intake tube.

Inspect all sides of the old sensor for any debris, soot or damage.

Chevrolet-Colorado-MAF-Sensor-Replacement-Guide-013 Chevrolet-Colorado-MAF-Sensor-Replacement-Guide-014 Chevrolet-Colorado-MAF-Sensor-Replacement-Guide-015
If you would like to try cleaning the old sensor before purchasing a new sensor, use some cleaning spray specifically made for MAF sensors such as CRC Mass Air Flow Sensor Cleaner.

Gently spray the sensor wire with the cleaning spray and allow it to air dry.

Do not use compressed air or forcefully shake the sensor to avoid damaging the sensor wire.

The OEM sensor is marked as part number ACDelco 23262343 (two cross reference part numbers include 23118170 and 20787043).

OEM Part Number
MAF Housing - Air Intake
Slide In New Sensor
Orientate the new sensor with the black plastic side facing up towards you and the silver metal side facing down towards the floor.

Slide the new sensor straight into the slot.

New Sensor Installed
Replace Two Screws
Tighten Clockwise
Replace the two screws by turning them in the clockwise direction with the Torx T20 screwdriver until they are snug.

Try to avoid over tightening the screws to prevent from cracking the plastic sensor housing.

Push On Power Plug
Slide In Red Locking Tab
Connector Secured
Slide the electrical connector straight on to the MAF sensor.

You should feel or hear the power plug "click" securely into place.

Slide the red plastic lock tab in towards the sensor to secure the connector in place.

If you have an OBD2 scan tool, clear any MAF sensor related codes.

Start the engine and take the truck for a short test drive to see if it is running properly.

Be sure to write down the MAF sensor cleaning or replacement in your vehicle's service records.

Please check out all of my 2015-2019 GM Chevrolet Colorado DIY Repair & Maintenance Guides.

If you found this guide to be helpful, please consider making a small donation by clicking on the "Donate" button located to the right of this paragraph. Thank you!
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