* Tire size: The sticker on your driver's side doorjamb will list the recommended tire size(s) for your vehicle. The correct inflation pressure will vary depending on the tire size.
* Tire load rating: The sidewall of your tire will have a load rating (often expressed as a number followed by letters like "107S" or similar). Higher load ratings require higher pressures.
* Load: How much weight is in the van (passengers, cargo). Heavier loads require higher pressures (within the tire's maximum pressure rating).
Where to find the correct pressure:
1. Driver's side doorjamb sticker: This is the *most important* place to look. It will list the recommended tire pressure for your specific vehicle configuration. This pressure is usually for normal driving conditions with a normal load.
2. Tire sidewall: The maximum inflation pressure for your tires is printed on the sidewall. Never exceed this maximum pressure.
3. Owner's Manual: Your owner's manual may also have tire inflation information, but the doorjamb sticker is usually considered more accurate as it accounts for your vehicle's specific setup.
In short: You *must* check the sticker on your driver's side doorjamb. Use that pressure as your starting point. Adjust upward slightly if you're carrying a heavy load, but always stay within the maximum pressure listed on your tire's sidewall.
