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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 986 (HVAC System - Automatic) >> Diagnostic Information and Procedures >> Blower Motor Malfunction >> Diagnostic Fault Information

Diagnostic Fault Information

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Blower Motor Control Module B+ 1 1 - -
Blower Motor B+ 1 1 - -
Blower Motor Speed Control 2 1 1 -
Blower Motor Control 2 1 1 -
Ground - 1 - -
1. Blower Motor Inoperative
2. Blower Motor Always On
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