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