Transmission Internal Mode Switch Logic
WARNING: This page is about a different car, the 2010 GMC Sierra and 2010 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
| Gear Selector Position |
Signal A |
Signal B |
Signal C |
Signal P |
| Park (P) |
LOW |
HI |
HI |
LOW |
| Reverse (R) |
LOW |
LOW |
HI |
HI |
| Neutral (N) |
HI |
LOW |
HI |
LOW |
| Drive 4 (D) |
HI |
LOW |
LOW |
HI |
| Drive 3 (3) |
LOW |
LOW |
LOW |
LOW |
| Drive 2 (2) |
LOW |
HI |
LOW |
HI |
| Drive 1 (1) |
HI |
HI |
LOW |
LOW |
HI = Ignition voltage
LOW = 0 volts |