Common questions

When to replace position indicator switch on 2002 envoy?

When to replace position indicator switch on 2002 envoy?

I dropped it off at my local independent shop. They advised that their is a service bulletin that states when the position indicator switch is replaced on a 2002 and only on a 2002 model envoy it has to be reprogramed, which they did. It worked fine and all was back to normal for two days , now it’s not working again and acting the same way.

When do I replace the encoder on my 2002 envoy?

Good Deal. I dropped it off at my local independent shop. They advised that their is a service bulletin that states when the position indicator switch is replaced on a 2002 and only on a 2002 model envoy it has to be reprogramed, which they did.

Is there a 4 wheel drive selector switch?

The selector switch lights do work when first started then go out also the service 4 wheel drive light stays on. Scan test needed on the transfer case module. Anything else is wasting time and money!

Where is the encoder on a GM 4×4?

That is not the 4×4 encoder. The encoder is on the transfer case and controls the shifting movement. The GM tech might have given you good information, but you replaced a part that has nothing to do with the encoder. That part will not fix the 4wd.

I dropped it off at my local independent shop. They advised that their is a service bulletin that states when the position indicator switch is replaced on a 2002 and only on a 2002 model envoy it has to be reprogramed, which they did. It worked fine and all was back to normal for two days , now it’s not working again and acting the same way.

The selector switch lights do work when first started then go out also the service 4 wheel drive light stays on. Scan test needed on the transfer case module. Anything else is wasting time and money!

Good Deal. I dropped it off at my local independent shop. They advised that their is a service bulletin that states when the position indicator switch is replaced on a 2002 and only on a 2002 model envoy it has to be reprogramed, which they did.

Why does my 4 wheel drive not engage?

The transfer case could pose another reason why your 4 wheel drive fails to engage. This could be due to the vehicle not coming to a complete stop to allow it to engage. This is because the splined pin and gears of the actuator need to align 100% with the gears inside the transfer case.

Is the GMC Envoy 4 wheel drive or transfer case?

2002 envoy.wont engage to 4wd light says it in 4wd and you can heard it click but won’t go in 4wd would that be the transfer case motor? 21 people found this helpful.

What does the blinking 4 wheel drive indicator mean?

So what is that 4 wheel drive indicator blinking on your dashboard means? The purpose of the 4 wheel drive light is to indicate when you have engaged 4WD mode by selecting 4H. When the light flashes continuously for more than 30 seconds it signifies there is a problem somewhere on your drivetrain system and that 4WD has not engaged properly.

What causes no 4 wheel drive or lights on?

In a lot of cases the power control to the actuator has been compromised, causing no actuator function. So that being said then you would have to be able to diagnose and trace circuits pertaining to the operation and function of the 4wd system.

That is not the 4×4 encoder. The encoder is on the transfer case and controls the shifting movement. The GM tech might have given you good information, but you replaced a part that has nothing to do with the encoder. That part will not fix the 4wd.

In a lot of cases the power control to the actuator has been compromised, causing no actuator function. So that being said then you would have to be able to diagnose and trace circuits pertaining to the operation and function of the 4wd system.

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Ruth Doyle