1999 LT Pushbutton 4X4 Question

[rsteiger]

Let me start out by saying I have never owned a 4X4 before nor a Chevy truck so I am learning a lot as I resurrect my 1999 Tahoe with 187,000 miles.

Right now it drives really well and I have taken it out quite a bit. I have not messed with the pushbutton 4WD system.. yet.

What I have noticed is that sometime there is an LED on the 2WD button that is lit at times and other times it is not lit. Normally when I start it the light is off and there are no lights on any of the 4WD buttons. Once I am driving for a bit I will notice the LED is lit on the 2WD button which I assume is right since I am pretty sure it is in 2WD. I have not seen a light come on any other the other buttons.

Is it normal for this light to come on and off? If so what is it telling me?

 

[ocampo75]

my tahoe has th same issue budy; when i remove the dash i noted that the wires on the 4x4 buttons seems to have bad contact and let the led turno off and on when theres some movement on the tahoe..

 

[rsteiger]

my tahoe has th same issue budy; when i remove the dash i noted that the wires on the 4x4 buttons seems to have bad contact and let the led turno off and on when theres some movement on the tahoe..

OK.. thanks I will take a look at the connections and maybe some WD40 is in order. Other that that I won't worry about it.

 

[JIvey13]

So, I had the same problem with my 2000Old Body Style Z71. I contatcted my dad wh sells autoparts and he contacted a buddy of his at the dealer. He said i had to change the 4wd actuator motor on th transfer case. I looed up the problem agan and found that over time the actuator accumulates water and corrodes. Finally after a year and a half of not having a working transfer case, I put in the new actuator and low and behold it worked. So, I would try that if I were you.

 

[lesterl]

I was having an iffy 2wd light, also my backlight was burnt out, I pulled the switch apart, replaced the 2 bulbs, resoldered everything and cleaned the contacts and it works beautifully, no replacement parts but 2 cheap radio shackbulbs required....

 

[rsteiger]

Thanks guys!

Got my shop manuals the other day and they give a set of tests to determine the issue. Based on what I do know it sounds like an electrical connectivity issue on the light portion.

Once I get the truck back (my friends have been borrowing it since I got it running) I will start with the electrical side first.

 

[2000tahoez71]

If it's cold outside, my light on the 2wd side will come one. If it's warm, it goes out. 4x4 works fine, haven't investigated it any further.