For 1990-2009 cars
Makes 🢒 Chevrolet 🢒 2004 🢒 C-Series Medium Duty Truck C6/7/8 - Mexico 🢒 Transmission/Transaxle 🢒 Automatic Transmission - Allison 🢒 Pressure Switch and Solenoid Logic States

#### Pressure Switch and Solenoid Logic States

Range | C | D | E | REV
--- | --- | --- | --- | ---
N | On | On | On | OFF
R | On | On | On | On
R* | OFF | On | On | On
4 | OFF | OFF | On | OFF
3 | On | OFF | On | OFF
2 | On | OFF | OFF | OFF
1 | OFF | OFF | OFF | OFF
| OFF | On | OFF | OFF
*N04 and later at closed throttle