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Home >> Chevrolet >> 2023 >> Tahoe SSV >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Controls And Fuel - 3.0L (Lm2) Diesel - Diagnostic Information And Procedures (4 Of 5)) >> Diagnostic Information and Procedures >> DTC P21CB >> Repair Instructions

Repair Instructions

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Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification

Reductant Control Module Replacement (Long Wheelbase) , or Reductant Control Module Replacement (Short Wheelbase) - K115 Reductant Control Module

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