A new light on your dashboard? You don’t understand why it doesn’t shut off… It’s normal, an auto is complex and there are various motives why a light might come on. In the event that your glow plug light comes on while driving your GMC Savana, it may possibly show some problems. In this article, we will do everything we can to help you see things more clearly. First, we will discover how the preheating light on your GMC Savana functions, and then the different reasons it lights up when you are driving

glow-plug-light-gmc-savana

What is the role of my GMC Savana glow plug light?

The primary role of the engine glow plug light, which is in most cases symbolized by a yellow coil, is to ensure that your glow plugs are working correctly. In reality, it must light up when you switch on your GMC Savana to tell you that they are heating the intake air in your cylinders and must go out after a few moments when the engine is running. This preheat light is therefore not expected to stay or come on while driving with your motor vehicle. However, if it turns on while driving, it may show multiple issues, we will try to explain the most important ones.

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

A glow light that comes on while driving on your GMC Savana or at any other time other than when the engine is started is meant to warn you to a problem other than your spark plugs, we will take a look at this now. In any case, plug in your car to the diagnostic tool will allow you to accurately understand the motive for the light up of your glow light.

My GMC Savana glow light comes on and I’m encountering a loss of power

The first situation is that you notice that your glow plug light comes on while driving your GMC Savana and that you also experience a loss of power. In this instance, some trouble can demonstrate its lightning. Here is a list of the most important motives:

  • Problem of EGR valve, indeed, if you suffer a loss of power, it is possible that your EGR valve is blocked, in such a case, it is rational that your preheat light comes on while driving on GMC Savana because it is one of the issue of which it is expected to alert you. Have the status of your valve checked out
  • 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 performance of the turbo.
  • Problem relevant to the injection, either an injector that has seized up or the injection pump that is malfunctioned by filings or other possible foreign bodies that disturb its proper performance.
  • Finally, the last problem that could lead to a glow indicator light on your GMC Savana coupled with a loss of power, is that your fuel filter is too dirty, you should get 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 Savana

To finish , we’ll give you the reasons for a glow plug light that comes on on your GMC Savana without you feeling any difference in power or motor vehicle behaviour. In general, this is an electronic problem:

  • Glow plug relays or fuses to be changed, test and change 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, check the other alternatives first because it is not easy to find it alone, we recommend you to go to your repair shop.
  • Faulty injection pressure sensor, ECU error

    • If you wish more guides on the GMC Savana, go to our GMC Savana category.