How do I replace door hinge pins and bushings on a 97' gmc 1500?

1994 to 2003 Chevy 10 GMC 15 Blazer and Jimmy Door Hinge Pin Replacement this should help you

The only door bushings I am aware of are the ones on the hinge pins. Correct? If not, please clarify what you mean.
New pins come with new bushings, and the hinges are welded on so the pins are pretty much the only items replaceable. Not a fun job - because of the door stop springs you will need a spring compressor, and you will also need a special tool to drive out the old pins. However, both are available from a parts store or Amazon.
Just open the door and support it from the bottom, and then go for it, one pin at a time - for the upper pin, compress and remove the small spring, drive out the old pin, drive in the new pin and put the spring back. No spring on the bottom hinge - just replace the pin.

I have done a 100 of these.

The hardest part is going to be to reinstall the spring on the lower hinge arm. this is not a screw but rather a pin.
There are two hinges that hold the door to body.
when the upper and lower pins are removed the door will come away from body, it is important that before you remove the pins you take a look at the hinges.
Pay close att. to the way the hinges sit inside each other and the way the pins go in. see if they go from top to bottom or from bottom to top. also note where the copper bushings sit in hinges. each hinge has one pin and two copper bushings top go into hinge.
Over time the pins and bushings wear out ,making door hard to open and close. When the pins and bushings get so bad that the bushing is worn out and then the pins are now wearing into the hinge hole itself then this get tricky. if hinge hole is egg shaped the new bushings will not last. the door will hang again in a few weeks. this is where is get costly, the hinges now need replacing. i have gotten good at welding the holes and filing them back to shape but this takes skill or hole will be wrong and bushing will not fit or line up.

Here is a youtube video to help you.
Take note. put jack stands under door with cloth to avoid scratching door.this is to hold door when pins are removed. have somone help you, they will hold door on stands. the wires will still run through door, pull door away from body a little to allow room to work.remove the spring, it will fall out as you remove pins, remove old bushings, clean hinge area and holes,next install new bushings, apply lube to holes for pins and on bushings, slide door back on frame hinges and install pins, next slide lock washers on pins to hold pins. last is the spring. you will need a spring tool, you may rent one at auto parts store. hope this helps good day.

1. Place masking tape on the inside edges of the door, on both the inside and outside of the door. 2. Remove the door spring by using a door spring removal tool. Insert the tool into the door spring, turn the knob with a screwdriver to compress the spring, then pull out the tool. 3. Set a 5-gallon bucket under the door. This will help support the weight of the door. 4.Place a nail punch under the hinge pin, and strike it with a hammer. Repeat this until the hinge pin begins to come out of the hinge. 5.Place the end of a flat-head screwdriver under the top of the hinge pin, then strike the screwdriver with the hammer to force the hinge pin out of the hinge. 6. Place the bushing on top of the new door hinge pin, and tap it into place with the hammer. 7. Insert the new hinge pin into the hinge. Tap on the hinge pin with the hammer and nail punch to force the pin into the hinge. 8. Insert the hinge spring back into the door, and release the tension on the spring removal tool. 9. Spray the door hinge with a lubricating spray or apply grease.

I know there are a few directions but it is fairly easy to do. If you have access to an air hammer and a compressor you can use this in place of a manual hammer to make the process a bit easier.

Hope this helps.

put a jack under door to hold up take a big screw driver pull spring out the use screw driver to drive both pins out thenpull door away from truck replace bushings then put door back put pins back in hinges

may need new hinges on door and body of vehicle, if so it is about 600 -700 to replace , may be able to get new bushing and pins , without replacing hinges

The spring is likely "broken" because the pins in the bushings are worn. It's a common failure point on many GM vehicles. The hinge pins, bushings door check roller and spring can be replaced at most body shops for about $150-200.

if the hinges are loose making the door difficult to close the brass bushings in the hinge pins are worn
replace the parts to regain a perfect closure to your door
if not replaced the latch will go bad very soon

try using engine oil.put oil in a little can oiler.oil the door hinges pins and bushings.if it still sqeek.door hinge need adjustment.or the door hinge pin and bushing need replacing.

Likely nothing to adjust.
With the door open, see if the door can be lifted up and down while looking at the hinges. If there is play, the door hinge pins/bushings are worn out, and on some vehicles, the hinges are not serviceable, and replacement will be needed. G/L