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Home >> Chevrolet >> 2007 >> HHR LS, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Entertainment Systems >> Cellular System, Entertainment System, And Navigation System >> Diagnostic Information and Procedures >> OnStar Button LED Inoperative >> Circuit/System Description

Circuit/System Description

The vehicle communication interface module (VCIM) commands on the red or green LED by supplying ground to either the keypad red signal circuit or keypad green signal circuit.

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