A new light on your dashboard? You don’t understand why it doesn’t switch off… It’s typical, a vehicle is complicated and there are various motives why a light might occur. In cases where your glow plug light comes on while driving your Chevrolet Avalanche, it may possibly point out different issues. In the following paragraphs, we will do anything we can to help you see things more clearly. First, we will see how the preheating light on your Chevrolet Avalanche operates, and then the different causes it lights up when you are driving


What is the goal of my Chevrolet Avalanche glow plug light?

The primary intent of the engine glow plug light, which is most of the time symbolized by a yellow coil, is to guarantee that your glow plugs are working properly. Indeed, it must light up when you switch on your Chevrolet Avalanche 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 meant to stay or come on while driving with your vehicle. However, if it turns on while driving, it may indicate several troubles, we will try to point out the most important ones.

What to do if the glow plug light comes on while driving on my Chevrolet Avalanche?

A glow light that comes on while driving on your Chevrolet Avalanche or at any other time other than when the engine is started is designed to notify you to a problem other than your spark plugs, we will look at this right now. No matter the reason, plug in your car to the diagnostic tool will allow you to carefully translate the reason for the light up of your glow light.

My Chevrolet Avalanche glow light comes on and I’m suffering from a loss of power

The first probability is that you perceive that your glow plug light comes on while driving your Chevrolet Avalanche and that you also encounter a loss of power. In this instance, different trouble can describe its presence. Here is a list of the most important motives:

  • Problem of EGR valve, in fact, if you suffer a loss of power, it is possible that your EGR valve is clogged, in such a case, it is obvious that your preheat light comes on while driving on Chevrolet Avalanche 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 result in turbo boost and a disturbance in the performance of the turbo.
  • Problem linked to the injection, either an injector that has seized up or the injection pump that is damaged by filings or other possible foreign bodies that affect its proper function.
  • Finally, the last issue that could lead to a glow indicator light on your Chevrolet Avalanche coupled with a loss of power, is that your fuel filter is too dirty, you should experience 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 Chevrolet Avalanche

To finish , we’ll give you the causes for a glow plug light that comes on on your Chevrolet Avalanche without you feeling any difference in power or vehicle behaviour. Ordinarily, this is an electronic problem:

  • Glow plug relays or fuses to be swapped out, 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 get rid of the issue.
  • 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 Chevrolet Avalanche, go to our Chevrolet Avalanche category.