P2B87 · 厂商技术资料

CADILLAC, CHEVROLET, GMC · 2026-04-16

This preliminary information communicates an issue with an SES MIL DTC P2B87 and/or P2B86 cause by the Aux heater coolant pump have an unwanted oring stuck in the pump. Dealers are to remove oring and reinstall pump.

BUICK, CADILLAC, CHEVROLET, GMC · 2022-01-18

This technical bulletin provides repair information to correct a customer concern of Service Engine Soon MIL Illuminated with DTC P2B87 Set.

CHEVROLET, GMC · 2021-03-05

This Preliminary information communicates an issues with an SES MIL and DTC P2B87 setting. Engineering has releasing updated cals to correct the concern.

CADILLAC, CHEVROLET, GMC · 2021-03-05

This Preliminary information communicates an issues with an SES MIL and DTC P2B87 setting. Engineering has releasing updated cals to correct the concern.

BUICK, CADILLAC, CHEVROLET, GMC · 2020-12-27

This Preliminary information communicates that a customer may bring a vehicle in with an SES light on. If the technician finds a code P2B87 (auxiliary coolant pump underspeed) set in the ECM they are directed to not replace the G17 heater coolant pump because this will not fix the concern. The techician is instructed to clear the code and release the vehicle to the customer with the explanation that an updated calibration will be released in the future to address the code setting.

CADILLAC, CHEVROLET, GMC · 2020-12-03

This Preliminary information communicates an issues with an SES MIL and DTC P2B87 setting. Engineering is working on releasing updated BCM cals to correct the concern.

CADILLAC, CHEVROLET, GMC · 2020-10-29

This Preliminary information communicates an issues with an SES MIL and DTC P2B87 setting. Engineering is working on releasing updated BCM cals to correct the concern.