The 2005 Chevrolet TrailBlazer may or may not have an mass airflow sensor; the 4.2L engine variant omitted it altogether. If You have the 5.3L engine instead, You'll find the sensor immediately outside of the air box on the flex hose. It should be relatively simple to find, if You know what You're looking for. I recommend looking up an image of the part so You have a decent starting point. If You're looking to replace, breathe a sigh of relief because it's a relatively inexpensive part. You'll find replacements available through most major automotive part stores for the $40 to $75 range, depending on brand quality. Combine that with a simple swap labor-wise, and this makes for a perfect DIY project.
Margaret R.
April 9, 2020
Mass airflow sensor is located near the throttle body on the 2005 chevy trailblazer.
Later model trailblazers Have a MAF sensor located on the air tube aft of the filter housing
José
November 5, 2023
En la trailblazer 2005 que tengo hay un conector muy pequeño entre el Vortec y el filtro del aire, cuando trato de quitarlo no puedo. No se si ese sea el sensor MAS, cuando busco reemplazo en los AutoZone me buscan un sensor enorme que no es acorde al auto aunque ellos me dicen que es ese.
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