Transmission Internal Mode Switch Logic
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Transmission Internal Mode Switch Logic
| Gear Selector Position | Signal A | Signal B | Signal C | Signal P |
|---|---|---|---|---|
| Park | LOW | HI | HI | LOW |
| Park/Reverse | LOW | LOW | HI | LOW |
| Reverse | LOW | LOW | HI | HI |
| Reverse/Neutral | HI | LOW | HI | HI |
| Neutral | HI | LOW | HI | LOW |
| Neutral/Drive 6 | HI | LOW | LOW | LOW |
| Drive 6 | HI | LOW | LOW | HI |
| Drive 6/Drive 4 | LOW | LOW | LOW | HI |
| Drive 4 | LOW | LOW | LOW | LOW |
| Drive 4/Drive 3 | LOW | HI | LOW | LOW |
| Drive 3 | LOW | HI | LOW | HI |
| Drive 3/Drive 2 | HI | HI | LOW | HI |
| Drive 2 | HI | HI | LOW | LOW |
| Open | HI | HI | HI | HI |
| Invalid | HI | HI | HI | LOW |
| Invalid | LOW | HI | HI | HI |
| HI = Ignition voltage LOW = 0 volts |
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