Last post on Aug 24, 2013 at 7:44 PM
You are in the Chevrolet Suburban & Tahoe
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Chevrolet Tahoe, Chevrolet Tahoe Limited/Z71, Chevrolet Suburban, SUV
#9 of 120 Re: 4WD Indicator Light [fire305]
Feb 11, 2008 (7:48 pm)
I own a 2003 Chevy suburban and have the same problem with the 4wd and I found out that in times you need to get it working you can pull the fuse ("TREC" all wheel drive module) from under the hood and wait 15 seconds and install it again. This is the fuse for the all wheel drive module. Do this when the truck is running and it should activate the module to get everything working again. Living in Wis. you need 4wd to get around in the snow.
I was told that the module does not sense the power so it does not turn on. now it been working fine for 3 months now and it did not cost me anything. This not a fix all solution but it worked for me. right now
#10 of 120 Re: Fans Switch - Speed controls [peatro]
Mar 30, 2008 (6:48 pm)
I'm having the same problem. Any solutions? I also can not find on any parts websight how to buy a new switch.
#11 of 120 check 4wd indicater light problem
Apr 06, 2008 (6:25 am)
i have 2001 suburban the check 4wd light comes on sometimes and stays on until you turn car off. might not come for a week or two then does same thing again. there are no service codes in computer. any ideas.
#12 of 120 Re: check 4wd indicater light problem [hunterjo]
Apr 06, 2008 (6:51 am)
I had a problem where not only would my "SERVICE 4WD" indicator light come on, but it would actually shift itself into 4WD when I started it up. I replaced my dash 4WD switch w/ a new one. It cost about $55 w/ shipping. Since I have put it in, the "SERVICE 4WD" indicator light, has not come on. But, I have noticed as it starts to get warmer outside, I am still having the problem where I my Suburban will show the RED "N" light on my 4WD buttons. So I may have to actually get the Chevy dealership to look at it..... and then take out a loan to pay for it!!
#13 of 120 Re: check 4wd indicater light problem [hunterjo]
Jun 30, 2008 (6:30 am)
This is a fairly common problem. Chevrolet has determined the Transfer Case Control Module sometimes does not get the "wake up call" it expects upon start up.
There is a TSB issued, 02-04-21-006E. Available via subscription on All Data among other places. The TSB discusses removing the fuse as described in this forum. Failing that, the TCCM requires replacement. There is a reprogramming routine that must be performed on the new TCCM, have not done this myself but expect it is not all that difficult.
#14 of 120 Re: check 4wd indicater light problem [rodonnell]
Nov 13, 2008 (5:35 am)
I've got the same problem. What is the "TSB" and where might this fuse be located?
#15 of 120 2001 Suburban 2500 4x4 Issue
Sep 12, 2009 (5:57 pm)
One day while attempting to shift into 4wd high from 2wd, all lights went out on the 2wd-4wd-4wd low swith and the "Service 4wd" light came on. I had a '99 Tahoe that did this once and replcing the fuse worked. I did the same thing but it didn't help. I unhooked the battery to attempt to reset the 4wd and the "Service 4wd" light is no longer on but the problem still exists. It appears to be in 2wd now but the snow is coming! What's the deal?
#16 of 120 Tahoe "check 4WD" indicators
Oct 02, 2009 (6:25 pm)
To several of you on the forum, I noticed your concerns were over a year ago - so what happened? Did you have to replace the Transfer Case Control Module (TCCM)? I'm experiencing all of those systems you all have gone thru - the "check 4WD " message, no codes announcing anything's wrong, the off-on lite effect with the shift selection buttons etc. I went on Chevrolet Just Answer.com, and got a definitive response to change the TCCM. Even got the repair manual guidance and instructions on how to do it - but havent done it yet. No where in the simple bolt out bolt in , unplug replug process does it describe a "reprogramming". Hope this info is of some value. Welcome any responses. My Tahoe is a 03 Tahoe LT.
#17 of 120 Re: Tahoe "check 4WD" indicators [chek]
Oct 02, 2009 (6:51 pm)
I felt pretty dumb when I realized there was an additional fuse under the hood of my 2001 Suburban (ATC) for the automatic transfer case. I had only checked the fuse inside the cab when the 4WD went out and it wasn't until I read another post that I realized there was another one. The ATC fuse was blown when I checked it. Even though the car wasn't on I heard the transfer case shift when I replaced the fuse. It has been fine since. Time to buy a couple more fuses!
#18 of 120 Re: Tahoe "check 4WD" indicators [bryons]
Oct 08, 2009 (3:59 pm)
Don't feel too bad Bryons. I too am going through the same thing on our 1997 Tahoe. Replaced Universals earlier this week. Then 4WD would not work. Got it to go into 4WD. Now it is tuck there. Checked all the connections and the dash fuse. Was ready to take it to the dealer until I found this forum. Tomorrow will be checking for the ATC fuse! Now if someone could tell me were it is located under the hood it would be appreciated! Thank you.