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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1140 (HVAC System - Automatic) >> Description and Operation >> Automatic HVAC Description and Operation >> Auxiliary Air Speed

Auxiliary Air Speed

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

Auxiliary A/C has a blower motor that is independent to that system. Voltage is supplied to the auxiliary blower motor from the rear fuse block. The auxiliary blower motor switch applies ground to the auxiliary blower motor control circuit that corresponds to the selected blower speed. The resistors and the blower motor are in a series circuit. The following list represents the number of resistors in series with the auxiliary blower motor per particular speed request:

When the operator requests High speed, ground is applied directly to the auxiliary blower motor.

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