water pump failure and dtc p2b85

 

Vehicles Affected:

2020 Cadillac CT4

2020-2021 Cadillac CT5

2020-2021 Chevrolet Silverado 1500

2020-2021 GMC Sierra 1500

Condition:

Certain 2020 model yr Cadillac CT4 or 2020-2021 mannequin year Cadillac CT5, Chevrolet Silverado, and GMC Sierra vehicles, geared up with a gas engine, may additionally hold a circumstance between which the printed tour board intimate on the lotus pump may also hold been built incorrectly potentially inflicting a pump failure. The automobile coolant regulation fervor is monitored or will display a couple of warnings to the consumer so coolant temperatures rise. At a set coolant temperature, the MIL will illuminate, DTC P2B85 will engage in the engine rule module (ECM), and the fat strain gauge will indicate excessive dark lantern pressure and decreased torque with notification to the operator of reduced monitoring intention occur. If the patron continues in accordance with force afterward it warns or the coolant temperature continues to rise, a chime wish occurs, the AC desire lies incapable then extra news instructing the driver to idle wish illuminate. If the patron continues in accordance with force the car since whole previous warnings yet the coolant fervor continues according to upward jostle news the bibcock pleasure stop below ought to occur, and the instrument choice keeps stopping down.

Correction:

The dealer's intention replaces the water pump.

Service Procedure:

Replace the electric pump assembly.