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Color coding is used to identify the different levels – blue for intermediate voltage cables and orange for high voltage
cables.
The GMC Yukon and Sierra, Chevrolet Tahoe and Silverado, and Cadillac Escalade Two-mode Hybrid vehicles fall
within both the Intermediate and the high voltage range.
Two-mode Hybrids utilize 300v (both AC and DC) for Hybrid System operation. A 120v AC Accessory Power Outlet
(APO) is provided at the left, rear corner of the cargo area. Also, a 42v system supplies the Electric Power Steering
(EPS) System.
DC/ACVoltageClassifications
GM has categorized voltage levels as either
low, intermediate, or high voltage.
• Low voltage – from 0 to 30 volts
DC / 0 to 15 volts AC
• Intermediate voltage – from 30
volts or greater to 60 volts DC / 15
volts or greater to 30 volts AC
• High voltage – any voltage
greater than 60 volts DC / 30 volts AC
Note: Presently there are no industry standards to identify intermediate voltage. GM has
chosen the color BLUE for this cable color.
