With some fabrication, you could make it fit; but completely stock it won't. Even if it did, the body styles are different. Keep in mind that the body style of the suburbans were the same from 82' all the way to 1991, then they switched to the GMT400 that lasted to 2000. The GMT400's front clip is slightly angled for a more 'aerodynamic' look, while a 1990 Suburban's front clip is completely straight.
75W-90 in the rear differential. 80W-90 in the front differential (4x4 models). This is according to the 2007 Chevrolet Suburban owner's manual.
yes 90 trough 99 are the same base models
80-90 PL-5 gear oil
It should fit because they had the same front end from 82 - 90
Yes it will but your lights will be different.
Should be a little black rubber hose with a 90 degree bend coming out of the firewall just above the right frame rail.
8x11 = 88 < 90
$50-$90
Small plug on the front side of center part, on passenger side half way up, Use a 3/8 drive handle square socket, Crawl under in front right rear wheel.
Yes it will fit and probably will work but it is not the correct size.
36.5 gallons if you have the large gas tank and most did
Not to my knowledge there is not. I have a 90' suburban with the barn doors. The hinge mounts are a part of the actual body. I do not believe the mounts are manufactured into the body of a suburban with a tailgate.