LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1539 (Engine Cooling System - Non-Hybrid) >> Diagnostic Information and Procedures >> Coolant Heater Inoperative (with Diesel) >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Test the engine coolant heater for an open or short to ground.
    • If open or shorted, replace the heater.
  2. If the heater tests normal, replace the coolant heater power cord.
scientia non olet · About LEMON Manuals