GM Service Manual Online
For 1990-2009 cars only

Name

Allison 1000 Series

1st Range Ratio

3.10:1

2nd Range Ratio

1.81:1

3rd Range Ratio

1.41:1

4th Range Ratio

1.00:1

5th Range Ratio

0.71:1

Reverse Range Ratio

4.49:1

Transmission Fluid Type

DEXRON® III

Maximum Gross Combined Weight (GCW)

11 800 kg (26,000 lb)*

Maximum Gross Vehicle Weight (GVW)

9 000 kg (19,850 lb)*

* Or Vehicle Manufacturers Chassis Rating, whichever is less