Standard Rear Axle Option Only
4x4 3.73 ratio (opt GT4)
4x4 10 bolt cover 3.73 ratio (opt GT4)
4x4 10 bolt cover 2.56 ratio (opt GM8)
4x4 14 bolt cover 4.10 ratio (opt GT5)
4x4 12 bolt cover 4.11 ratio (opt GT5)
4x2 2.56 ratio (opt GM8)
4x4 10 bolt cover 3.08 ratio (opt GU4)
4x4 14 bolt cover 3.73 ratio (opt GT4)
4x2 10 bolt cover 2.73 ratio (opt GU2)
4x2 14 bolt cover 3.73 ratio (opt GT4)
4x4 3.21 ratio (opt HC8)
4x4 4.10 ratio (opt GT5)
4x2 full-floating 3.73 ratio (opt GT4)
4x2 crew cab 3.21 ratio (opt HC8)
4x2 model VIN R 4.56 ratio (opt HC4)
4x2 full-floating 4.10 ratio (opt GT5)
4x4 6 lug wheel 3.73 ratio (opt GT4)
4x2 crew cab 3.73 ratio (opt GT4)
4x4 8 lug wheel 3.73 ratio (opt GT4)
4x2 crew cab 4.10 ratio (opt GT5)
4x2 SRW 3.23 ratio (opt GU5)
4x2 SRW 4.10 ratio (opt GT5)
4x2 SRW 3.42 axle ratio (opt GU6)
4x2 SRW 3.73 ratio (opt GT4)
4x2 SRW 4.56 ratio (opt HC4)
(AWD)
Standard Rear Axle Option Only
4x2 off road suspension (opt Z71)
4x4 3.73 ratio (opt GT4)
4x4 4.10 ratio (opt GT5)
4x4 3.42 axle ratio (opt GU6)
4x2 sport suspension (opt ZQ8)
new style (smooth door skin) 4x2
classic style (creased door skin)
new style (smooth door skin) AWD
4.10 ratio (opt GT5)
4.2L 18" wheel 3.73 ratio
4.2L 20" wheel 3.42 ratio
5.3L 3.73 ratio
5.3L 18" wheel 3.42 ratio
5.3L 4.10 ratio
4.2L 17" wheel 3.42 ratio
4.2L 18" wheel 3.42 ratio
5.3L 18" wheel 3.73 ratio
5.3L 20" wheel 3.73 ratio
4.10 ratio (opt GT5)
3.42 axle ratio (opt GU6)
3.73 ratio (opt GT4)
3.42 ratio GU6
3.73 ratio GT4
4.10 ratio GT5
3500 Series DRW removable carrier late
2500 Series 3.21 ratio (opt HC8)
2500 Series 3.42 axle ratio (opt GU6)
3500 Series drum rear brakes SRW
3500 Series DRW removable carrier
3500 Series SRW 3.23 ratio (opt GU5)
3500 Series DRW removable carrier early
3500 Series DRW removable carrrier
3500 Series SRW 4.10 ratio (opt GT5)
2500 Series 3.73 ratio (opt GT4)
(4x4) 3.08 ratio (opt GU4)
4x4 3.42 axle ratio (opt GU6)
3.73 ratio (opt GT4)
(4x4) 3.73 ratio (opt GT4)
4x2 3.42 axle ratio (opt GU6)
4x2 2.73 ratio (opt GU2)
(4x4) 2.73 ratio (opt GU2)
3.42 axle ratio (opt GU6)
4x4 3.73 ratio (opt GT4)
4x4 2.73 ratio (opt GU2)
4x2 2 Dr 3.42 axle ratio (opt GU6)
4x2 4.11 ratio (opt H04)
4x2 2 Dr 3.08 ratio (opt GU4)
4x4 4.11 ratio (opt H04)
4x4 AWD 3.42 axle ratio (opt GU6)
4x2 3.73 ratio (opt GT4)
4x2 8-1/2" ring gear w/o ZR2
4x4 4 Dr 3.42 axle ratio (opt GU6)
4x2 7-5/8" ring gear (3.42 ratio, GU6)
4x2 7-5/8" ring gear
3.08 ratio (opt GU4)
2.56 ratio (opt GM8)
3.23 ratio (opt GU5)
3.73 ratio (opt GT4)
4.11 ratio (opt HO4)
4.10 ratio (opt GT5)
3.42 axle ratio (opt GU6)
2.73 ratio (opt GU2)
3.42 axle ratio (opt GU6)
active brake control (opt JL4)
3.73 ratio (opt GT4)
8500 GVW (opt C5F) 3.73 ratio (opt GT4)
8600 GVW (opt C6P) 4.10 ratio (opt GT5)
8500 GVW (opt C5F) 4.10 ratio (opt GT5)
10-1/2" ring gear
9-3/4" ring gear 3.73 ratio (opt GT4)
10-1/2" ring gear (3.54 ratio, opt GH0)
8600 GVW (opt C6P) 3.73 ratio (opt GT4)
full floating axle (13 x 3.5" brakes)
9-1/2" ring gear (3.42 ratio, opt GU6)
7300 GVW (opt C6A)
Cutaway Van DRW 3.73 ratio (opt GT4)
cutaway SRW 10-1/2" ring gear
exc. cutaway
cutaway SRW 9-1/2" ring gear
exc. cutaway 4.10 ratio (opt GT5)
Cutaway Van SRW 10-1/2" ring gear
cutaway DRW 10-1/2" ring gear
cutaway DRW 3.73 ratio (opt GT4)
cutaway DRW 4.10 ratio (opt GT5)
cutaway DRW
9.5" ring gear (14 bolt) brake opt JF3
Regular Cab 4x2 3.08 ratio (opt GU4)
exc. Crew Cab 4x2 3.08 ratio (opt GU4)
4x2 3.08 ratio (opt GU4)
exc. Crew Cab 4x4 4.10 ratio (opt GT5)
8.6" ring gear (10 bolt) brake opt JD9
4x2 3.42 axle ratio (opt GU6)
Regular Cab 4x2 3.73 ratio (opt GT4)
exc. Crew Cab 4x2 3.73 ratio (opt GT4)
4x4 3.73 ratio (opt GT4)
semi-floating axle 4.10 ratio (opt GT5)
full-floating axle 4.10 ratio (opt GT5)
11.5" ring gear (3.73 ratio, opt GT4)
full-floating axle 3.73 ratio (opt GT4)
10.50" ring gear 3.73 ratio (opt GT4)
10.5" ring gear 4.10 ratio (opt GT5)
semi-floating axle 3.73 ratio (opt GT4)
10.50" ring gear 4.10 ratio (opt GT5)
11.50" ring gear (3.73 ratio, opt GT4)
10.5" ring gear 3.73 ratio (opt GT4)
SRW 3.73 ratio (opt GT4)
SRW 4.10 ratio (opt GT5)
9.75" ring gear (6.2L)
8.6" ring gear (10 bolt)
9.5" ring gear (14 bolt)
9.5" ring gear (5.3L)
Standard Rear Axle Option Only
Standard Rear Axle Option Only
4x2 3.42 axle ratio (opt GU6)
2.73 ratio (opt GU2)
4x2 2.73 ratio (opt GU2)
4x2 3rd shock 3.08 ratio (opt GU4)
4x4 3.73 ratio (opt GT4)
4x2 3rd shock 3.73 ratio (opt GT4)
4x2 w/o 3rd shock 3.08 ratio (opt GU4)
4x2 w/o 3rd shock 4.10 ratio (opt GT5)
4x2 4.11 ratio (opt H04)
4x2 3rd shock 3.42 axle ratio (opt GU6)
(3.42 ratio, opt GU6)
(AWD)
(3.42 ratio, opt GU6)
4x4 3.42 axle ratio (opt GU6)
2 Dr 4x2 3.42 axle ratio (opt GU6)
8-1/2" ring gear 3.08 ratio (opt GU4)
4 Dr 4x4 3.73 ratio (opt GT4)
4 Dr 4x2 3.42 axle ratio (opt GU6)
2 Dr 4x4 3.73 ratio (opt GT4)
4 Dr 4x2 3.73 ratio (opt GT4)
Denali (5.7L, 3.73 ratio, opt GT4)
4x2 3.42 axle ratio (opt GU6)
4 Dr 4x4 3.42 axle ratio (opt GU6)
4x4 3.42 axle ratio (opt GU6)
4x2 4.10 ratio (opt GT5)
4x4 4.10 ratio (opt GT5)
3.73 ratio (opt GT4)
4x2 3.73 ratio (opt GT4)
4x2 3.42 axle ratio (opt GU6)
4x4 3.73 ratio (opt GT4)
4.10 ratio (opt GT5)
4.10 ratio (opt GT5)
3.73 ratio (opt GT4)
(3.73 ratio, opt GT4)