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