Check the size of the wiper blades. Measure them and round up if you have a partial inch. Then Google 'lookup wiper size' and verify that you have the correct size.
If you have the right size, then its most likely a wiper arm alignment issue which is outside of my expertise.
I have a 1999 Chevy blazer 4.3 v6 we just replaced them there is three two up stream and one down stream. If you get under there and look you will find them with no problem. I'm a woman and I found them with no problem. two on passanger side one on drivers side. unless you have two catalitic converters then there is 4
The 4x4 actuator is screewed into the front differential housing towards the passanger side, It has electric wires going to it,
Under dash, drivers side.
gerflerbergab
Under the Dashboard on the Drivers side, has a Plastic Cover.
under the drivers side on the frame
Should be along the frame under drivers seat.
On the drivers side of the throttle body.
It is on the drivers side of the transmission
look at the info sticker inside drivers door. My 89 blazer came with 31x10.5x15 from the factory.
it is located behind the ciggeratte lighter. But you have to have the star drivers to be able to get to it
The fuse box is located under the dash on the drivers side.