2011 2500, express van, 4.8, hydro boost brakes, Power steering fluid ok, 190k, intermittently when turning the wheel at parking lot or no speed will get a honk from the power steering. Any ideas, would Lucas power steering additive help? Thanks

 

Check for leaks along system, if none found, can try lucas fluid (not stop leak) w/conditioners. Use a siphon to empty res first to prevent overfill. Only other ideas are bleed system if there might still be air. If it hasn't seen service recently, might be an indicator for rebuild/replacement.