NHTSA ID Number: 10205590
Manufacturer Communication Number: 21NA271
Summary
This bulletin advises the technician of a possible coolant hose that might be kinked causing the customers concern.
18 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
CADILLAC | ESCALADE | 2021-2022 |
| CADILLAC | ESCALADE ESV | 2021-2022 |
| CHEVROLET | SILVERADO 1500 | 2020-2022 |
| CHEVROLET | SUBURBAN | 2021-2022 |
| CHEVROLET | TAHOE | 2021-2022 |
| GMC | SIERRA 1500 | 2020-2022 |
| GMC | YUKON | 2021-2022 |
| GMC | YUKON XL | 2021-2022 |
Condition
Some customers may comment that the MIL is illuminated.
Some technicians may find DTC P026A set in the Engine Control Module (ECM).
Cause
This may be due to a kinked hose at or near the low temperature auxiliary coolant pump.
Correction
If this condition is encountered, loosen the hose clamp and rotate the hose to allow for proper coolant flow.
SEOCONTENT-START
Service Bulletin Bulletin No.: 21-NA-271
Date: November, 2021
INFORMATION
Subject: Information on Malfunction Indicator Lamp (MIL) Illuminated – DTC P026A Set
This bulletin replaces PIP5745A. Please discard PIP5745A.
Brand: Model:
Model Year: VIN: Engine: Transmission:
from to from to
Cadillac Escalade models 2021
2022
LM2
Chevrolet
Silverado 1500 2020 LM2
Suburban 2021 LM2
Tahoe 2021 LM2
GMC
Sierra 1500 2020 LM2
Yukon models 2021 LM2
Involved Region or Country North America, Uzbekistan, Russia, Middle East, Chile, Columbia, Ecuador, Paraguay,
Peru, Uruguay, Japan, S. Korea, Thailand, Australia, New Zealand.
Condition
Some customers may comment that the MIL is illuminated.
Some technicians may find DTC P026A set in the Engine Control Module (ECM).
Cause This may be due to a kinked hose at or near the low temperature auxiliary coolant pump.
Page 2 November, 2021 Bulletin No.: 21-NA-271
Correction
5635568
If this condition is encountered, loosen the hose clamp and rotate the hose to allow for
proper coolant flow.
5635679
Version 1
Modified Released November 19, 2021
SEOCONTENT-END
1 Associated Document
Manufacturer Communications
Bulletin No.: 21-NA-271
Date: November, 2021
NHTSA ID Number: 10178395
Manufacturer Communication Number: PIP5745
Summary
This Preliminary information communicates to technicians a possible cause and correction for a P026A
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP5745
Published date: 07/29/2020
MC-10178395-9999.pdf 363.903KB
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