P1887 GMC - Torque Converter Clutch Release Switch Circuit
- Faulty Torque Converter Clutch (TCC) Release Switch
- Torque Converter Clutch (TCC) Release Switch harness is open or shorted
- Torque Converter Clutch (TCC) Release Switch circuit poor electrical connection
- Engine Light ON (or Service Engine Soon Warning Light)
P1887 Gmc DescriptionWith the engine speed over 500 rpm, TR switch in D4, Torque Converter Clutch (TCC) commanded on, TCC slip speed is -20 to +40, the Powertrain Control Module (PCM) detects that TCC Release pressure was present (the switch is open).
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