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