Service 4WD

[gbleezy]

I have a 2008 Tahoe LTZ and when switching from 2WD to Auto, I the light blinks longer than usual but eventually stays lit on Auto. I can also switch it to 4WD High and it stays lit there. However, the Service 4WD message appears on the DIC. Since the light stays solid on Auto and High, does this mean my 4WD is still working?

 

[wjburken]

I have a 2008 Tahoe LTZ and when switching from 2WD to Auto, I the light blinks longer than usual but eventually stays lit on Auto. I can also switch it to 4WD High and it stays lit there. However, the Service 4WD message appears on the DIC. Since the light stays solid on Auto and High, does this mean my 4WD is still working?

If you are getting the Service 4WD message, get it checked out. Have checked to see what codes are present? Might get under it and make sure you at least have oil in your transfer case.

 

[gbleezy]

If you are getting the Service 4WD message, get it checked out. Have checked to see what codes are present? Might get under it and make sure you at least have oil in your transfer case.

Thanks for the reply. I'm planning to get it checked out, was just curious so figured I'd ask on the forums.

 

[wjburken]

Thanks for the reply. I'm planning to get it checked out, was just curious so figured I'd ask on the forums.

No matter what, make sure you have fluid in the transfer case. My 2004 gave me the same symptoms and I before I could get to a place that I could check anything, it turned into a box of gravel because the case developed a leak and the fluid had drained out without me noticing.

 

[gbleezy]

No matter what, make sure you have fluid in the transfer case. My 2004 gave me the same symptoms and I before I could get to a place that I could check anything, it turned into a box of gravel because the case developed a leak and the fluid had drained out without me noticing.

What's the easiest way to confirm there's fluid in there?

 

[wjburken]

What's the easiest way to confirm there's fluid in there?

Jack it up, crawl under it, remove the fill plug and stick you finger in the hole. Fluid level should be just below the fill inlet. If it is not, put some fluid in.
I believe your transfer case takes DEXRON -VI ATF fluid, but double check your manual.

 

[Kenneth L Nielsen]

I have a 2008 Tahoe LTZ and when switching from 2WD to Auto, I the light blinks longer than usual but eventually stays lit on Auto. I can also switch it to 4WD High and it stays lit there. However, the Service 4WD message appears on the DIC. Since the light stays solid on Auto and High, does this mean my 4WD is still working?

Probably not working. If you are mechanically inclined we can give you some more tips, otherwise time to take it in...