My truck went in for the operation today, dealer said steering box was bad so they ordered me a CH52113500AF. It is indeed a DELPHI box and the lettering is clearly visable by looking down at the overcenter adjustment area. The difference was immediatly noticable, the steering is VERY tight but not sticky and its much more responsive. Before my steering seemed sluggish to responded and had a dead feeling to it. This often caused me to overcorrect while cornering plus I had the dreaded wandering. It now takes a little more effort to turn the wheel, even at parking lot speed, but I was starting to get used to it on the drive home. I'm hoping this cured my problem, only time will tell but it looks good so far and difference is night and day from before. Good luck guys, hope this helps
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2001 black dually,4x4, 6 speed H. O. ,loaded up and then some!

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2001 black dually,4x4, 6 speed H. O. ,loaded up and then some!