4x4 quit working

The links lead me to believe there are interchangeable. In fact this page confirms the compatible models

https://shiftritetransmissions.com/shop/4l60e_98-05_4x4/

1998-1999 Chevrolet Silverado K1500 4.3L 4X4
1998-1999 Chevrolet Silverado K1500 5.0L 4X4
1998-1999 Chevrolet Silverado K1500 5.7L 4X4
1998-1999 GMC Sierra K1500 4.3L 4X4
1998-1999 GMC Sierra K1500 5.0L 4X4
1998-1999 GMC Sierra K1500 5.7L 4X4
1998-2000 Chevrolet Tahoe 1500 5.7L 4X4
1998-2000 GMC Yukon K1500 5.7L 4X4
1998-1999 Chevrolet Suburban K1500 5.7L 4X4
1998-1999 GMC Suburban K1500 5.7L 4X4
1999-2000 Cadillac Escalade 5.7L 4X4
1999-2000 GMC Yukon Denali 5.7L 4X4
1998-2005 GMC Safari 4.3L 4X4
1996-2005 Chevrolet Astro 4.3L 4X4
1996-2005 Chevrolet Blazer 4.3L 4X4
1996-2001 GMC Jimmy 4.3L 4X4
1996-2001 Oldsmobile Bravada 4.3L 4X4
1998-2001 GMC Envoy 4.3L 4X4
1996-2004 Chevrolet S10 4.3L 4X4
1996-2005 GMC Sonoma 4.3L 4X4

https://www.google.com/search?q=1999+K1500+push+button+transmission+4WD

https://www.google.com/search?q=1999+Chevy+Tahoe+push+button+4WD+transmission+4L60E



1999 - 2006

4wd switch mounts to tranny around 70 bucks,takes about 5 minutes to change

vacuum switch needs to be replaced.

try selecting from nutreul or less then 3km

I would say that it is probably the buttons themselves. I had problems with my 99 doing this too.

check the solenoid on the front chunk these vehicles have had a lot of problems with these solenoids. have personally replaced about 10 of these on 98-02 models.

This is common in GM trucks since they started adding 'Autotrak' push button 4WD. I would drain and purge the transfer case fluid and replace with new. There should be drain and fill plugs. But it sounds like you might have a stripped gear. Might be a trip to the shop just to be safe.

Make sure that all 4 tires have the same tread on them, if one or more of them are different, then the 4wd may not engage. I had the same problem with my blazer, I changed only 2 tires at a time. The front tires would rotate faster than the rear ones, the gears in the transfer case won't line up right.

a little tip a friend gave me in unlocking the 4wd drive on ramps or hill and then put in neutral let roll back a foot put in park and then let off the 4wd
when in 4wd the hubs get a little heated cause they need greased so they stick into position making it hard to come out of 4wd this which i spoke of i got stuck in the senerio where i almost drove home in 4wd from 300 miles away but i called my friend he told me bought this and so i thought it could help you

your hubs just locked up on you your bearings are going to need to be packed again this is normal for this

hub