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Home >> GMC >> 2020 >> Terrain Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Controls And Fuel - 1.5L (LYX) - Diagnostic Information And Procedures (2 Of 2)) >> Diagnostic Information and Procedures >> DTC P129D >> Circuit/System Description

Circuit/System Description

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The fuel pump driver control module monitors the ignition voltage circuit in order to determine if the voltage is within the normal operating range.

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