2002 2500hd low coolant light3/13/2024 ![]() ![]() As always make sure your Tech 2 is updated with the latest software version. Refer to the Service Programming System procedures in SI. Technicians are to reprogram the Heating Ventilation and Air Conditioning (HVAC) control module with the latest software available on TIS2WEB. This condition may be caused by a false reading during off-road driving or in high slush conditions.ĭo This - Reprogram the HVAC control module.ĭon't Do This - Do not replace the coolant level sensor, HVAC control module or radiator surge tank.Ī revised calibration has been developed to address this condition. Some customers may comment that a " COOLANT LEVEL LOW ADD COOLANT" message is displayed in the Driver Information Center (DIC) even though the coolant level is normal. With 6.6L Diesel Engine (VIN 6 - RPO LMM) The cluster receives the class 2 message from the PCM indicating Low Coolant and displays the LOW COOLANT LEVEL message on the driver information center (DIC).Ġ8-08-49-002: False Triggering of Low Coolant Level Warning Message (Reprogram HVAC Control Module) - (Feb 13, 2008)įalse Triggering Of Low Coolant Level Warning Message (Reprogram HVAC Control Module)Ģ007-2008 Chevrolet Silverado 25 Heavy Duty Series OnlyĢ007-2008 GMC Sierra 25 Heavy Duty Series Only ![]() Ground is provided by the ground circuits via the body wiring harness junction block and the engine wiring harness junction block. The message center receives its power from engine wiring harness junction block on the battery positive voltage circuit. When the engine coolant level switch reads a low coolant level in the fill tank, the switch opens. The powertrain control module (PCM) sends out a coolant loss signal over the coolant level switch signal circuit. ![]() ![]() The engine cooling system contains an engine coolant level switch to alert the driver in the event of a coolant loss. The IPC receives a class 2 message from the PCM indicating the coolant level. The IPC illuminates the LOW COOLANT indicator in the message center when the IPC detects a low coolant level condition from the PCM. If you notice an oily surface in your coolant, immediately have your mechanic inspect your Sierra 2500 HD for head gasket leakage.Sensor in the fill tank is probably bad. Suburban low coolant sensor clean it dont replace it by froggyThanks for 1 million viewsAttempt all work at your own risk. Taking off the coolant reservoir cap on a warm engine could cause the cap to up explosively and fluid to spray out of the reservoir. See our video on how to add engine coolant for tips on adding coolant to your Sierra 2500 HD.Īlways wear safety goggles when working on your Sierra 2500 HD. If you need to add anti-freeze, be sure to check your owners manual to determine the correct type of coolant to add - in GMCs, it usually located in a section titled Fluid Capacities towards the end of your manual. The video above shows you where the coolant reservoir in your Sierra 2500 HD is located and how to check the coolant / antifreeze level. Engine coolant / antifreeze circulates through your engine to keep it cool in the summer but won't freeze in the winter. In order to get an accurate reading, your 6.0 liter engine should be cool to the touch when you check it. Checking the engine coolant (also known as antifreeze) level in your 2004 GMC Sierra 2500 HD is pretty easy. ![]()
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