Engine bog question

[bigfeet]

I have a 98 Tahoe that has 187k on it. It runs like a top. Well, today at about 20mph, she bogged down for about 2 seconds then went right back to normal. This happened four times in ten minutes. Then ran fine for the twenty minute ride home. Any thoughts or ideas would be appreciated. The oil pressure was steady at around 38psi. Engine temp was at 180ish. It was 60 degrees outside. Thank you all in advance. I wouldn't normally worry about something small like this but I know this truck and something is up.

 

[SunlitComet]

Have your fuel pressure checked. Your pump may be on the verge of failure soon.

 

[Gzes]

Pump os most likely it or fuel filter is needing replacement