Why does my pontiac grand am buck?

[Mas]

I have a 2002 pontiac grand am and when i press on the gas or have to pick up gas while heading up a hill my car bucks. It acts as if it might conk out several times and then i push on the gas and ride through it and it goes away. Nothing registers on my dash board, all the lights work, but nothing comes up as to what the problem is. Ne help would be so greatly appreciated! This car has beenso good for me, i dnt know why this has been happening (for past two years)

 

[melsg5]

When is the last time the car had a tuneup, air filter, fuel filter etc?

 

[J Wikoff]

Get the fuel pressure checked. I don't know what the specs are, but low pressure could do this.