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Home >> GMC >> 2011 >> Yukon Base, 5.3 3 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Automatic Transmission - 2ML70 - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P1824, P182A-P182F, P1838, or P1839 >> Circuit/System Verification

Circuit/System Verification

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Transmission Internal Mode Switch Logic

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 (D) HI LOW LOW HI
Manual (M) HI HI LOW LOW

Test for the correct operation of the S2 transmission manual shift switch. Refer to Transmission Internal Mode Switch Logic .