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.

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

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.

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

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).

Slide the new sensor straight into the slot.

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

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.