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Home >> Chevrolet >> 2023 >> Tahoe SSV >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Controls And Fuel - 3.0L (Lm2) Diesel - Diagnostic Information And Procedures (5 Of 5)) >> Diagnostic Information and Procedures >> DTC P261F, P2B86, P2B87, P3077, P3078, U0623, or U137E >> DTC Descriptor

DTC Descriptor

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DTC P261F

Auxiliary Coolant Pump Stuck On

DTC P2B86

Auxiliary Coolant Pump Overspeed

DTC P2B87

Auxiliary Coolant Pump Underspeed

DTC P3077

Auxiliary Coolant Pump Low Speed

DTC P3078

Auxiliary Coolant Pump High Speed

DTC U0623

Lost Communication with Auxiliary Coolant Pump

DTC U137E

Invalid Data Received from Heater Coolant Pump

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