* Floor-shifter: The most common setup for a 1998 Suburban would be a floor-mounted transfer case shifter. This lever would have positions for 2WD, 4HI (4-wheel high), and 4LO (4-wheel low). There's no button involved.
* Electronic Shift-on-the-Fly: Some 1998 Suburbans *might* have had an electronic system, but it's less likely than the floor shifter. Even with an electronic system, it would likely involve a rotary dial or switch, not a simple button. If you have this type, there would probably be a small indicator light showing the selected drive mode.
To know for sure what kind of 4WD system your Suburban has, you need to:
1. Check your owner's manual: This will definitively tell you how to engage 4WD.
2. Look at your center console: Look for a floor-mounted shifter or a rotary dial/switch near the gear shifter.
3. Examine the dashboard: There might be indicator lights showing the selected drive mode.
If you're having trouble engaging 4WD, the problem is likely *not* just the absence of a button but rather a mechanical or electrical issue within the transfer case or its control system. You'll need to consult a repair manual or a mechanic to diagnose the problem.
