Bogging at WOT

[sherfield2002]

I've got a 97 Yukon (5.7,4l60e) that's bogging at WOT. Doesn't matter if it's from a stop or roll. It's particularly bad when using cruise and going up a hill. The cruise wants to increase the throttle to maintain speed, but it just bogs down until I hit the brake to disable cruise. The truck seems to be running fine unless I go WOT. The RPM climb to about 2500 and stall until I let of the gas. Below are a couple of short videos showing the problem, one from a stop and one from a roll.
What could be causing this? TPS?

http://youtu.be/Hwc5HWXeC3U
http://youtu.be/DOKtm6uSgm0

 

[sherfield2002]

Not the TPS. Replaced it and still no luck.

 

[ezdaar]

whens last time you replaced fuel filter?

 

[sherfield2002]

I've only had it a few weeks, so I'm not sure when it was replaced. I could try change it out pretty easily though.

 

[livingez_123]

I would start with the fuel filter and check your fuel pressure at the rail.

 

[retorq]

TPS will throw codes.

 

[sherfield2002]

Update: Changed fuel filter and all is good. Not sure how old the filter was, but it was an AC Delco and judging from the amount of black gunk I poured out of it, it may have been the original...