Fits these vehicles with these options:
SIERRA 2500 PICKUP 11-14 10.50″ ring gear, 3.73 ratio (opt GT4)
SIERRA 2500 PICKUP 15-16 w/o fill plug in cover; (10.50″ ring gear), 3.73 ratio (opt GT4)
SIERRA 2500 PICKUP 17-18 w/o fill plug in cover; (10.50″ ring gear), 3.73 ratio ( opt GT4 )
SIERRA DENALI 2500 11-14 6.0L (10.50″ ring gear), 3.73 ratio (opt GT4)
SIERRA DENALI 2500 15 w/model year break point (opt AVF), w/o fill plug in cover; (10.50″ ring gear), 3.73 ratio (opt GT4)
SIERRA DENALI 2500 15 w/o model year break point; w/o fill plug in cover; (10.50″ ring gear), 3.73 ratio (opt GT4)
SIERRA DENALI 2500 16 w/o fill plug in cover; (10.50″ ring gear), 3.73 ratio (opt GT4)
SIERRA DENALI 2500 17 w/o fill plug in cover; (10.50″ ring gear), 3.73 ratio ( opt GT4 )
SILVERADO 2500 PICKUP 11-14 10.50″ ring gear, 3.73 ratio (opt GT4)
SILVERADO 2500 PICKUP 15-16 w/o fill plug in cover; (10.50″ ring gear), 3.73 ratio (opt GT4)
SILVERADO 2500 PICKUP 17-18 w/o fill plug in cover; (10.50″ ring gear), 3.73 ratio ( opt GT4 )
7090 7091 AA10 AA1Z AA35 AA36 AASL AASM AAY9 AAZA AB23 AB48 ABFW ABFX ABPR ABPS ACA6 ACG3 ACG5 ACGY BK5 BK6 JADA JADB JADS JADT
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