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