1997 chevy 1500 going around curves steering wheel with tension seems to slip a little making it swerve a little

Check the automatic belt tension and the condition of the belt. This sounds more likely belt slipping than a power steering issue.
Diagnose belt tensioner

Try spraying a little WD40 into the ignition . Make sure tension is off the steering wheel. Turn steering wheel back and forth while trying to remove key.
Good Luck!
Bob

possible wheel bearing at fault. if it heard/felt more when turning or swerving and is a growling type noise, more than likley is. possible bad tire shouldnt be over looked. is abs light on? most often when wheel bearing is bad a speed sensor ( within wheel bearing ) will go open, setting abs light. vehicle needs to be ran on a hoist to try and duplicate noise/vibration.

sounds like its the passenger side hub assembaly/wheel bering

If it is trying to drive you into the kerb it is called oversteer. If it seems as if it doesn't feel like going round the corner at all it is called understeer. It has to do with the angles of your wheels or that your shock absorbers are worn. You need to have the wheel alignment, camber and castor and shock absorbers checked. If there is a bigger problem they will pick it up when they do the checks.

Something is bent... have a front end shop check it out, replace any bent parts and re align the front end.

Check ball joints and tie rod ends for play. Jack the truck up on the frame and try to move the wheel up and down for ball joints and side ti side for tie rod ends. Also make sure you check the idler arm on passenger side and pitman arm on steering box. None of the parts should any play whatsoever. If there is any play in them when you try to move them then replace them.
There could also be excessive play in the steering box but that shouldn't make it swerve back and forth. That would just let it wander to one side or the other until you corrected it by turning the wheel. Hope this helps.

Chevy is having problems with the steering columns on these models. Feels like a jiggle in the steering wheel when you hit a bump of any kind. Cost about $75 at the dealer for a new part.

need to replace the sensor at base of colum steering wheel sensor

Hi

The Power Steering Belt tension requires adjustment, to give it more tension, to cure the slipping, resulting in the squealing, or perhaps renewal, due to cracking or excessive wear.

Your Power steering Belt, belt is your primary problem.

Good Luck !

A FixYa Would Be Nice, Thank´s......John.