You are watching: 2004 gmc envoy service 4wd light

*
*

*

*
Random "Service 4WD Light"


See more: Which Vessel Carries Waste-Laden Blood To The Kidney? Excretory System Review

Hi Guys,I obtained a difficulty with mine 2004 Chevy Blazer. The "Service 4WD irradiate randomly come up when driving in either Auto4WD or 4Hi. Initial situation:I bought my Blazer 3 months ago and unfortunately ns didn"t an alert that the Auto4WD irradiate was not working. It would switch despite (the 2Hi light would certainly go out and also stay out). After a while (sometimes ~ a few minutes, occasionally not in ~ all), the "service 4WD light" would come on and I wouldn"t be able to switch earlier to 2Hi or any type of other mode. After transforming the truck off and earlier on the light would certainly be gone and also and ns would have the ability to switch settings again. 4Hi would engage and work. Because of the irradiate in the move not functioning I believed my dash switch would certainly be defective.Situation now:A few days ago, the Auto4WD light suddenly operated again, however would simply go the end after a couple of minutes, complied with by the "service 4WD light" lighting up. Every lights would certainly illuminate at start as lock should and also the various other ones would certainly not go out. Now the "service 4wd light" would also sometimes which while 4hi is engaged. I took it to my chevy dealer and they ran some tests. In the finish they told me that they might just uncover a general tccm error code, yet the as soon as engaging the 4wd alternatives from underneath the automobile (with a scanner or something) everything would work fine. They recommend me to change the dashswitch and come earlier for further investigation if that wouldn"t carry out the trick. So I replaced the switch yesterday and it seemed like it assisted (Auto4WD light to be steady, felt favor it switched quicker to Auto4WD), yet then the business light would still come up while gift in Auto4WD and in 4Hi sometimes. I can feel both modes working together it"s fairly slippery in Winnipeg right now
*
.Does somebody have actually experienced something comparable or knows something come do? ns heard around the possibility of hooking increase an OBD2 scanner and send particular commands via computer to acquire a more exact fault password than simply by grounding pin 13, but I don"t recognize if that will occupational with my version of the truck / tccm.Best regardsVinceP.S. Really nice board!