NHTSA ID Number: 10205561
Manufacturer Communication Number: 21NA229
Summary
This service bulletin provides a procedure to install a winter grille cover to correct the customer concerns of Poor Engine Performance in Extremely Cold Weather Conditions, Charge Air Cooler Icing, Malfunction Indicator Lamp (MIL) Illuminated.
3 Affected Products
Vehicle
| MAKE | MODEL | YEAR |
CADILLAC | XT4 | 2019-2021 |
Condition
Some customers may comment on one or more of the following conditions when driving in extremely cold weather conditions (-18°C or less / 0°F or less):
- Loss of power
- Hesitation on acceleration
- Stalling condition
- MIL Illuminated
Cause
This condition may be caused by ice accumulation in the charge air cooler (CAC), restricting air flow.
Correction
A winter grille cover has been released to address this issue. Instructions for installation are included with the grille cover. The cover can be installed by the technician initially but the technician needs to educate the customer on the removal process after the winter season ends and how the customer will reinstall the cover the following winter season. One time installation of the winter grille cover is covered under warranty. This can be installed and charged to the unique labor operation code provided in this bulletin.
Important: The winter grille cover should be installed in extreme cold weather and removed when the winter season changes.
Additional covers and repeat installation are customer pay.
Important: Refer to #PIP5540J: Diagnostic Tip: Poor Engine Performance Or CEL On In Cold Ambient Temperatures On Vehicles Equipped With Turbocharged Gasoline Engines May Set One Or More Of The Following DTCs P0299 P2227 – (Oct 6, 2021) for additional service information on cleaning the CAC prior to winter grille cover installation.
Note: Clean the surface before installing the winter grille cover.
Parts Information
| Causal Part | Description | Part Number | Qty |
| N/A | COVER, FRT GRILLE | 85513002 | 1 |
SEOCONTENT-START
Service Bulletin Bulletin No.: 21-NA-229
Date: November, 2021
TECHNICAL
Subject: Poor Engine Performance in Extremely Cold Weather Conditions for LSY Engines,
Charge Air Cooler Icing, Malfunction Indicator Lamp (MIL) Illuminated
Brand: Model:
Model Year: VIN:
Engine: Transmission:
from to from to
Cadillac XT4 2019 2021 — —
2.0L
Turbo (LSY) —
Involved Region or Country North America
Condition
Some customers may comment on one or more of the following conditions when driving
in extremely cold weather conditions (-18°C or less / 0°F or less):
• Loss of power
• Hesitation on acceleration
• Stalling condition
• MIL Illuminated
Cause This condition may be caused by ice accumulation in the charge air cooler (CAC),
restricting air flow.
Page 2 November, 2021 Bulletin No.: 21-NA-229
Correction
5909887
A winter grille cover has been released to address this issue. Instructions for installation
are included with the grille cover. The cover can be installed by the technician initially but
the technician needs to educate the customer on the removal process after the winter
season ends and how the customer will reinstall the cover the following winter season.
One time installation of the winter grille cover is covered under warranty. This can be
installed and charged to the unique labor operation code provided in this bulletin.
Important: The winter grille cover should be installed in extreme cold weather and
removed when the winter season changes.
Additional covers and repeat installation are customer pay.
Important: Refer to #PIP5540J: Diagnostic Tip: Poor Engine Performance Or CEL On In
Cold Ambient Temperatures On Vehicles Equipped With Turbocharged Gasoline Engines
May Set One Or More Of The Following DTCs P0299 P2227 – (Oct 6, 2021) for additional
service information on cleaning the CAC prior to winter grille cover installation.
Note: Clean the surface before installing the winter grille cover.
Bulletin No.: 21-NA-229 November, 2021 Page 3
Parts Information
Causal
Part
Description Part
Number
Qty
N/A COVER, FRT
GRILLE
85513002 1
Warranty Information
Important: Emission Warranty coverage codes E
(Base Emission Warranty) and E1 (California Emission
Related Components 7 years/70,000 mile warranty)
apply for this Labor Operation.
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
2086368* Install grille Cover on XT4 0.2 hr
*This is a unique Labor Operation for bulletin use only.
Version 1
Modified Released November 12, 2021
Additional SI Keywords: P0299, P0236, P2227, P00C7
SEOCONTENT-END
1 Associated Document
Manufacturer Communications
Bulletin No.: 21-NA-229
Date: November, 2021
- GrilleAdz Brand: Made in the USA with US Sourced materials by a Veteran owned and operated manufacturing company!
- We have been manufacturing interior and exterior vehicle accessories since 1983 in Southern Missouri - We stand behind every product that ships out. If you have any questions or concerns with your order please do not hesitate to contact us- We are here to help!
- Adjustable Zippered WinterFront Allows You To Control The Air Flow!
- Includes Installation Hardware
- Made With Heavy Duty Marine Grade Vinyl
- Fits Freightliner Cascadia 2008–2026 – designed to match Cascadia grille shape Faster Engine Warm-Up – Helps maintain optimal temperature in cold weather. Reduces Fuel Waste – Improves efficiency during winter operation. Quick Installation – Installs in under one minute with strong straps and Velcro, no tools required Durable Winter Material – Blocks cold air, wind, snow, and ice.
- GrilleAdz Brand: Made in the USA with US Sourced materials by a Veteran owned and operated manufacturing company!
- We have been manufacturing interior and exterior vehicle accessories since 1983 in Southern Missouri - We stand behind every product that ships out. If you have any questions or concerns with your order please do not hesitate to contact us- We are here to help!
- Helps Maintain Optimum Engine Operating Temperatures Even in Sub-Zero Conditions
- Adjustable Zippered WinterFront Allows You To Control The Air Flow!
- Includes Installation Hardware
- Fits Volvo VNL 2008–2018 – Custom-sized winter grille cover. Faster Engine Warm-Up – Helps maintain optimal temperature in cold weather. Reduces Fuel Waste – Improves efficiency during winter operation. Quick Installation – Installs in under one minute with strong straps and Velcro. Durable Winter Material – Blocks cold air, wind, snow, and ice. For cold weather use only. Driver is responsible for monitoring engine temperature and removing the cover in warm conditions.
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