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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 258 (Hybrid Engine Cooling System) >> Diagnostic Information and Procedures >> Hybrid Cooling System Overheating (Electrical) >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, command the DMCM Coolant Pump ON and OFF with a scan tool.
  2. Observe the operation of DMCM coolant pumps.
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