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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 325 (HVAC System - Automatic) >> Diagnostic Information and Procedures >> DTC B1020: Auxiliary Electronic Control Unit (ECU) Performance >> DTC Descriptor

DTC Descriptor

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
DTC B1020

Auxiliary Electronic Control Unit (ECU) Performance

For symptom byte information, refer to Symptom Byte List .

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