Where to find the correct pressure:
1. Your driver's side doorjamb: This sticker lists the recommended tire pressure for your specific vehicle and tire size. This is the most reliable source. It will likely show different pressures for normal driving and maximum load.
2. Your owner's manual: The owner's manual also contains this information.
3. The tire sidewall: The tire sidewall will show the maximum pressure your tire can handle. Never exceed this number. The recommended pressure from the sticker will almost always be lower than the maximum.
In short: You *must* check the sticker on your driver's side doorjamb or your owner's manual for the correct tire pressure for your 2004 Chevy Suburban. Don't rely on a generic answer online.