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The Chevy Express comes with a power steering pump that helps the wheels move smoothly by circulating lubricants around its gears. To avoid damaging the pump and steering hydraulics, it's important to maintain proper fluid levels. For lubrication, any synthetic PS fluid designed for American vehicles, like Prestone multi-vehicle PS fluid, can be used in the Express. You can find the PS reservoir under the hood on the passenger side of the engine bay near the coolant reservoir, typically marked with identifying symbols. If you hear whining or high-pitched noises while turning the wheel, it might indicate low lubricant levels or the need for maintenance on the Express' power steering system.
The preferred power steering fluid for the Chevrolet Express is ATF Type III-H.