I have major squeaking under my truck while driving, could it be that my sway bar bushings need to be greased to stop the squeaking

If your technician said that it is not a safety issue, then I'm going to assume that he is talking about the sway bar bushings. This is the bar that runs across the back of the car and connects to each side of the suspension. You can removed those bushings by undoing the two metal cages that hold them in (one on each side in the center of the sway bar), and apply grease to where the bar rides against the bushings. This will take care of your annoying squeak. It isn't a safety issue but can be really annoying.

Hi
Squeak could be the low brake material waring tabs on the brake pads, or exhaust pipe rubbing or rusty in the exhaust hanger.....Mike

Front end squeaks are usually caused by rubber suspension parts. The most common source are the sway bar bushings. Nest would be the control arm bushings. You can spray the bushings with penetrating oil to see if the squeak stops. This would only be a temporary fix. Do the sway bar bushings first. Spray them down really good, and drive the car for a couple of days. If the squeak goes away, you will know you need to replace the bushings. Do the same thing to the control arm bushings. If you replace any of the bushings, use a high performance neoprene bushing, and use the special lube available before installation. The sway bar bushings will be an easy fix. The control arm bushings will require special equipment, and will need to be done in a shop.

check your rear sway bar mounted rubber bushes it's can make same noise first spray some silicon spray on it and get it for drive if problem solved replace mounting rubber..

be sur eif noise ics brake related ot not. if you are sitting still and turningck the brakes, cheap or incorrectly lubed pads may cause noises. the backs and any contact points and/or caliper slide pins should be lubed with a silicone based grease

needs to be greased. get a grease gun and crawl underneath and add grease to all grease zerks. your sway bar bushings could be dry too. spray them with some silicone lubricant. there is a bar that runs the width of the vehicle underneath usually between radiator and engine. This is your sway bar. There will be two metal horseshoe shaped brackets with rubber surrounding the bar. The rubber is your sway bar bushings.

THIS BAR IS CALLED THE SWAY BAR IT STOPS THE CAR FROM SWAYING LEFT TO RIGHT WHILE DRIVING THEY MAKE A BUSHING KIT FOR THESE , THE BAR SHOULD BE OK ALL YOU SHOULD NEED IS THE KIT

Get someone to help you with this: Reach behind the front wheel just rearward of the strut and you'll find a vertical rod that bolts to the strut just below the spring perch and the other end goes to the sway bar. Hold it and get someone to rock the van as hard as they can. There's and astronomically good chance you'll feel a popping in this rod. If you do, you need to replace it. It's called a sway bar link. You'll need 2 of them and the sway bar bushings as well. Spray the nuts on the links down real good with wd40. Hold the back side with a pair of channel locks to keep the ball joints in them from turning. I take the top nuts off first, then the sway bar bushings so I can move that thing around to gain access to the bottom nuts. Then put them back in reverse order. Remember this, if you do it, no matter what anyone tells you, DO NOT lubricate the sway bar bushings. After the first rain, they'll start squeaking and they'll NEVER stop. They are supposed to go on dry.

The sway bar bushings are under the large clamps that hold the bar to the frame. The ends of the sway bar are connected to the struts by the sway bar links. When the links wear out, they clunk--not squeak. The bushings are under the retainer in the pic below.

Actually, there are not a places to lubricate, other than the Rzeppa joints (those at the big ball & socket looking things right behind the front wheels). That being said, here is what I would look for if it was in my shop:
Examine the front sway bar bushings. They may be bad or worn. Rocking side to side will move the swat bar. Look at the bar, there are 4 bushings; 2 at each end, and 2 under the center of the vehicle, held in by a "half-moon" looking clamp. Spray WD-40 or something like that on it real good & drive it.
Get back to me if this does not help.