* Tire Puncture or Damage: This is the most likely scenario. Look carefully for embedded objects (nails, screws, glass), cuts, or bulges in the tire sidewall or tread. A slow leak might not be immediately obvious.
* Wheel Bearing Failure (Less Likely but Serious): While less common, a severely damaged wheel bearing could leak grease, which might be mistaken for another fluid. This would usually be accompanied by unusual noises (humming, grinding) from the wheel.
* Brake Fluid Leak (Very Serious): This is a *serious* safety issue. Brake fluid leaks are usually darker colored and have a distinctive odor. If you suspect brake fluid, do not drive the vehicle until it's inspected by a mechanic. Loss of braking power is extremely dangerous.
* Other Fluid (Extremely Unlikely): It's unlikely to be any other type of fluid, but theoretically, a power steering fluid leak *could* potentially reach the wheel area in severe circumstances. However, power steering fluid is usually very obvious.
What to do:
1. Safety First: If you suspect a brake fluid leak, do not drive the car. Call a tow truck or roadside assistance.
2. Visual Inspection: Carefully examine the tire and wheel area for any visible damage, punctures, or leaking fluids. Note the color and consistency of any fluid.
3. Check Tire Pressure: Check the tire pressure to see if it's significantly lower than it should be.
4. Professional Inspection: If you cannot identify the source of the leak or suspect a brake fluid leak, take your Grand Caravan to a trusted mechanic or tire shop for a thorough inspection.
Important Note: Ignoring a fluid leak, especially a suspected brake fluid leak, can lead to serious safety risks. It's always best to err on the side of caution and get it checked out promptly.
