Table. The main parameters of the automatic transmission
| Parameter | Models up to 2007 release (GMT 800) | Models since 2007 release (GMT 900) |
| Pro Codes | M30, M32 | M30/M70 |
| Manufacturer | Toledo/Ohio, Romulus | Toledo/Ohio |
| Vehicle drive | Rear (longitudinal engine) | |
| Gear ratios: | ||
| 1 gear | 3,059 | |
| 2 gear | 1,625 | |
| 3rd gear | 1,000 | |
| 4th gear | 0,696 | |
| rear | 2,294 | |
| Type of working fluid | DEXRON® III | DEXRON® VI |
| Working fluid volume | 11.5 l (torque converter 300 mm) 9.2 l (torque converter 258 mm) | 11.5 l |
| Weight (dry box) | ~86 kg (torque converter 300 mm) ~68 kg (torque converter 258 mm) | ~86 kg |