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