LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Hummer >> 2009 >> H3T Alpha >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Controls And Fuel - 3.7L - Introduction) >> Description and Operation >> Engine Control Module Description >> Malfunction Indicator Lamp (MIL)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Malfunction Indicator Lamp (MIL)

WARNING: This page is about a different variant/trim than selected.

The malfunction indicator lamp (MIL) is inside of the instrument panel cluster (IPC). The MIL is controlled by the engine control module (ECM) and illuminates when the ECM detects a condition that affects the vehicle emissions.