PIP5829

Bulletin No.: PIP5829
Published date: 11/22/2021
Preliminary Information
PIP5829 MIL Illuminated with DTC P0299
Models
Brand:
Model:
Model Years:
VIN:
from
Engine:
to
Transmissions:
BUICK
Encore GX
2019 - 2022
All
All
1.2L (LIH)
All
CHEVROLET
Trailblazer
2020 - 2022
All
All
1.2L (LIH)
All
Involved Region or Country North America
Condition
MIL illuminated with DTC P0299
Cause
Potential turbocharger wastegate linkage wear
Correction:
Some customers may comment that the MIL light is illuminated. A P0299 may be stored Current or in history.
First perform the following testing.
Disconnect the Turbocharger Wastegate Solenoid Vacuum Supply Hose (shown in g 1 below) from the
Turbocharger Wastegate Solenoid Valve.
Connect the EN-23738-A Vacuum Pump to the Turbocharger Wastegate Solenoid Vacuum Supply Hose.
Engine » Idling.
Verify the tool reading: EN-23738-A Vacuum Pump = −50 kPa (−0.5 bar, 15 in Hg).
If the desired pressure/vacuum cannot be achieved or does not hold steady.
Ignition/Vehicle » O .
Test or replace the component: Vacuum Pump Assembly / related hoses.
If the desired pressure/vacuum can be achieved and holds steady.
Engine » O .
Reconnect the Turbocharger Wastegate Vacuum Supply Hose to the Turbocharger Wastegate Solenoid Valve.
Disconnect the Turbocharger Wastegate Solenoid Actuator Supply Hose (shown in fig 2 below) from the
Turbocharger Wastegate Solenoid Valve.
Connect the EN-23738-A Vacuum Pump to the Turbocharger Wastegate Solenoid Valve Actuator supply port.
Engine » Idling.
Verify the tool reading: EN-23738-A Vacuum Pump = Less than −17 kPa(−0.17 bar, 5 in Hg).
If −17 kPa(−0.17 bar, 5 in Hg) or greater.
Test or replace the component: Q42 Turbocharger Wastegate Solenoid Valve.
If less than −17 kPa(−0.17 bar, 5 in Hg).
Engine Speed @ Wide Open Throttle — For 2 s.
Verify the tool reading: EN-23738-A Vacuum Pump = Greater than −50 kPa(−0.5 bar, 15 in Hg).
If less than−50 kPa(−0.5 bar, 15 in Hg).
Test or replace the component: Q42 Turbocharger Wastegate Solenoid Valve.
If Greater than −50 kPa(−0.5 bar, 15 in Hg).
Remove the Turbocharger from the vehicle and inspect the Turbocharger Wastegate linkage for excessive wear /
play. (Compare to replacement Turbocharger if necessary).
If found, replace the Turbocharger, and perform: Intake System Learned Values Reset.
Warranty Information
For vehicles repaired under the Emission coverage, use the following labor operation.
Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for
coverage information
Labor Operation
Description
Labor Time
4023250
4088328*
Turbocharger Wastegate Regulator Solenoid Valve
Replacement
Turbocharger Replacement
*This is a unique Labor Operation for Bulletin use only.
Version History
Version
Modi ed
1
11/22/2021 - Created on.
© 2021 General Motors. All Rights Reserved.
Use Published Labor Time
3.3 Hrs.