what type of axle

? Do you mean ratio or weather locking or not?

Manufacturer is AAM (American Axle & Manuf.)
Locking rear differential is made by Eaton Corp exclusively for GM

If you look inside the glove compartment you will find a list of option codes built on your vehicle. All the code that start in the G's refer to axle options.

List of common axle codes on pickups, could be anyone of these..

G80 : Differential, heavy-duty automatic locking, rear
GT4 : Rear axle, 3.73 ratio
GU4 : Rear axle, 3.08 ratio
GU5 : Rear axle, 3.23 ratio
GU6 : Rear axle, 3.42 ratio
 
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? Do you mean ratio or weather locking or not?

Manufacturer is AAM (American Axle & Manuf.)
Locking rear differential is made by Eaton Corp exclusively for GM

If you look inside the glove compartment you will find a list of option codes built on your vehicle. All the code that start in the G's refer to axle options.

List of common axle codes on pickups, could be anyone of these..

G80 : Differential, heavy-duty automatic locking, rear
GT4 : Rear axle, 3.73 ratio
GU4 : Rear axle, 3.08 ratio
GU5 : Rear axle, 3.23 ratio
GU6 : Rear axle, 3.42 ratio

i got lucky i have the G80
 


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