Replaced driveshaft u joints, now leaking output seal

[clandr1]

Is your truck 4WD? I’m looking for the same seal but in the reviews all I see is this is for 2wd. On the gm parts online it has 3 different seals to pick from but none say 4WD only 2wd. Just don’t wanna grab the wrong part when removing/installing . I only have 1 vehicle lol.

My truck is 2WD.