I have a 99 Yukon 4dr slt its just starting to show signs of hesitation on hard acceleration , this has been getting worse lately ,, I think its Time for a new Fuel filter?
drives normal other than that

Any check engine light or codes?
Does it only happen at certain times, ie. hot vs cold engine, only when it rains, etc.
Filter wouldn't hurt. Might be plugs and/or wires too.
Gary

Nope wires and plugs were fine 6 months ago no lights
I think its the filter or the electric pump, feels starved
on hard acceleration, if you back off the pedal it starts picking up again, ill throw it on a snap on computer saturaday and check the pressure, miles is about 55k

Dirty injectors?

That should have been:
Dirty injectors? How's idle?

idle is great runs fine , you would not know unless you punched it
to pass, worse in this colder weather, I know colder means more fuel,

Try the filter, it's cheap and easy.

My money's on the the filter.

Not easy in this cold its like 8 degrees and my buds garage is busy today so no lift

We just started a warming trend here in St Louis. It should be on it's way to you this weekend. You'll still need to wear your mittens though.