toytech76 said:put your 4wd lever in 4WH to be in 4 wheel high. 4WL is low range which you wont need unless you are doing some serious crawling or stuck. 2WH is 2 wheel drive
If your 97 is like my 2000, you should be in 2h until you move the 4wd shifter down one gear. Just straight down towards you. No need to put in neutral, you can shift into 4hi anytime while driving. Wouldn't do it anywhere near highway speed though
Mine also has a green light that turns on the dash. You should feel the difference in the 'grab' too while driving
The 96-97 limited have a push button 4x4 hi button on the 4x4 lever. You just push the button while driving and your in 4x4 hi. You only use the 4x4 shifter for going into 4lo. I believe this is only a feature of 96-97 limiteds.