A new light on your dashboard? You don’t find out why it doesn’t shut off… It’s typical, a car is elaborate and there are various motives why a light could come on. In cases where your glow plug light comes on while driving your GMC Yukon, it may signify some problems. In this article, we will do everything we can to help you see things more clearly. First, we will find out how the preheating light on your GMC Yukon functions, and then the different explanations it lights up when you are driving

glow-plug-light-gmc-yukon

What is the purpose of my GMC Yukon glow plug light?

The main purpose of the engine glow plug light, which is most of the time represented by a yellow coil, is to guarantee that your glow plugs are working properly. Indeed, it must light up when you switch on your GMC Yukon to tell you that they are heating the intake air in your cylinders and must go out after a few minutes when the engine is running. This preheat light is therefore not supposed to stay or come on while driving with your car. Nevertheless, if it comes on while driving, it may suggest different failures, we will try to describe the main ones.

What to do if the glow plug light comes on while driving on my GMC Yukon?

A glow light that comes on while driving on your GMC Yukon or at any other time other than when the engine is started is intended to notify you to a fault other than your spark plugs, we will check out this now. No matter the reason, connecting your vehicle to the diagnostic tool will allow you to precisely understand the motive for the light up of your glow light.

My GMC Yukon glow light comes on and I’m suffering from a loss of power

The first possibility is that you notice that your glow plug light comes on while driving your GMC Yukon and that you also encounter a loss of power. In this case, some complications can describe its lightning. Here is a list of the main motives:

  • Issue of EGR valve, indeed, if you are affected a loss of power, it is possible that your EGR valve is clogged, in this instance, it is expected that your preheat light comes on while driving on GMC Yukon because it is one of the issue of which it is expected to notify you. Have the status of your valve inspected
  • Problem associated with the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can lead to turbo boost and a perturbation in the operation of the turbo.
  • Problem relevant to the injection, either an injector that has seized up or the injection pump that is broken by filings or other possible foreign bodies that disrupt its proper performance.
  • Finally, the last problem that could lead to a glow indicator light on your GMC Yukon coupled with a loss of power, is that your fuel filter is too dirty, you should come to feel jerks because of a bad fuel flow in the engine.

My glow plug light comes on or is flashing but no difference on the performance of my GMC Yukon

Finally, we’ll give you the explanations for a glow plug light that comes on on your GMC Yukon without you feeling any difference in power or car behaviour. Ordinarily, this is an electronic fault:

  • Glow plug relays or fuses to be changed, test and replace if necessary.
  • A contactor/potentiometer on one of your pedals (brake, accelerator or clutch) has failed, often a simple de-seizure will be enough to fix the problem.
  • You have a false contact somewhere in your electrical circuit, test the other options first because it is not easy to find it alone, we encourage you to go to your repair shop.
  • Faulty injection pressure sensor, ECU error

    • If you have any additional questions about the GMC Yukon, do not hesitate to consult our GMC Yukon category.