The sensors usually have an arrow indicating the flow direction... Check the mass airflow voltage, it should increase steadily when accelerated and the flow should increase too
05 Chevy LLY
-Extended cab short bed 4x4
-Sinister EGR delete kit
-S&B turbo mouth piece
-Sinister intake tube
-AEM CAI
-PVC reroute
-4inch straight pipe
-Edge CTS juice with attitude plus hot tuning
-PPE race plug and ported FR fitting
-33's
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