NHTSA ID Number: 10198847
Manufacturer Communication Number: 19NA044
Summary
This service bulletin provides information on the cold start control system in DI engines to reduce cold start emissions and improve fuel economy.
593 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
BUICK | CASCADA | 2016-2019 |
| BUICK | ENCLAVE | 2008-2021 |
| BUICK | ENCORE | 2013-2021 |
| BUICK | ENCORE GX | 2020-2021 |
| BUICK | ENVISION | 2016-2021 |
| BUICK | LACROSSE | 2008-2019 |
| BUICK | LUCERNE | 2008-2012 |
| BUICK | REGAL | 2011-2020 |
| BUICK | TERRAZA | 2008 |
| BUICK | VERANO | 2012-2017 |
| CADILLAC | ATS | 2013-2019 |
| CADILLAC | CT4 | 2020-2021 |
| CADILLAC | CT5 | 2020-2021 |
| CADILLAC | CT6 | 2016-2020 |
| CADILLAC | CTS | 2008-2019 |
| CADILLAC | CTS-V | 2014 |
| CADILLAC | DTS | 2008-2011 |
| CADILLAC | ELR | 2014-2017 |
| CADILLAC | ESCALADE | 2008-2021 |
| CADILLAC | ESCALADE ESV | 2008-2021 |
| CADILLAC | ESCALADE EXT | 2008-2013 |
| CADILLAC | SRX | 2008-2016 |
| CADILLAC | STS | 2008-2011 |
| CADILLAC | XLR | 2008-2009 |
| CADILLAC | XT4 | 2019-2021 |
| CADILLAC | XT5 | 2017-2021 |
| CADILLAC | XT6 | 2020-2021 |
| CADILLAC | XTS | 2013-2019 |
| CHEVROLET | AVALANCHE | 2008-2013 |
| CHEVROLET | AVEO | 2009-2018 |
| CHEVROLET | BLAZER | 2019-2021 |
| CHEVROLET | BOLT EV | 2020-2021 |
| CHEVROLET | C SERIES | 2008-2009 |
| CHEVROLET | CAMARO | 2010-2021 |
| CHEVROLET | CAPRICE | 2011-2017 |
| CHEVROLET | CAPTIVA | 2008, 2012-2018 |
| CHEVROLET | CAPTIVA SPORT | 2009-2012 |
| CHEVROLET | CHEYENNE | 2017 |
| CHEVROLET | CITY EXPRESS | 2015-2017 |
| CHEVROLET | COBALT | 2008-2010 |
| CHEVROLET | COLORADO | 2008-2012, 2014-2021 |
| CHEVROLET | CORVETTE | 2008-2021 |
| CHEVROLET | CRUZE | 2011-2019 |
| CHEVROLET | EQUINOX | 2008-2021 |
| CHEVROLET | EXPRESS | 2008-2021 |
| CHEVROLET | HHR | 2008-2011 |
| CHEVROLET | IMPALA | 2008-2020 |
| CHEVROLET | MALIBU | 2008-2021 |
| CHEVROLET | N300 | 2014-2016, 2018 |
| CHEVROLET | N300 MAX | 2017 |
| CHEVROLET | ORLANDO | 2017 |
| CHEVROLET | S10 | 2016-2018 |
| CHEVROLET | SILVERADO 1500 | 2008-2014, 2017-2021 |
| CHEVROLET | SILVERADO 2500 | 2008-2021 |
| CHEVROLET | SILVERADO 4500HD | 2019-2021 |
| CHEVROLET | SONIC | 2012-2020 |
| CHEVROLET | SPARK | 2013-2021 |
| CHEVROLET | SPARK EV | 2014-2017 |
| CHEVROLET | SS | 2014-2017 |
| CHEVROLET | SUBURBAN | 2008-2021 |
| CHEVROLET | T SERIES | 2008-2010 |
| CHEVROLET | TAHOE | 2008-2021 |
| CHEVROLET | TRAILBLAZER | 2008-2009, 2017-2019, 2021 |
| CHEVROLET | TRAVERSE | 2009-2021 |
| CHEVROLET | TRAX | 2013-2021 |
| CHEVROLET | UPLANDER | 2008-2009 |
| CHEVROLET | VOLT | 2011-2014, 2016-2019 |
| GMC | ACADIA | 2008-2021 |
| GMC | CANYON | 2008-2009, 2015-2021 |
| GMC | ENVOY | 2008-2009 |
| GMC | SAVANA | 2008-2009, 2014-2021 |
| GMC | SIERRA 1500 | 2014, 2019-2021 |
| GMC | SIERRA 2500 | 2008-2009, 2014-2021 |
| GMC | SIERRA DENALI | 2008-2009, 2015-2019 |
| GMC | TERRAIN | 2010-2021 |
| GMC | YUKON | 2008-2021 |
| GMC | YUKON DENALI | 2008-2009 |
| GMC | YUKON DENALI XL | 2008-2009 |
| GMC | YUKON XL | 2008-2009, 2014-2021 |
| HUMMER | H2 | 2008-2009 |
| HUMMER | H3 | 2008-2009 |
| PONTIAC | G3 | 2008-2009 |
| PONTIAC | G5 | 2008-2009 |
| PONTIAC | G6 | 2008-2009 |
| PONTIAC | G8 | 2008-2009 |
| PONTIAC | GRAND PRIX | 2008 |
| PONTIAC | MONTANA | 2008-2009 |
| PONTIAC | PURSUIT | 2008-2009 |
| PONTIAC | SOLSTICE | 2008-2009 |
| PONTIAC | TORRENT | 2008-2009 |
| PONTIAC | VIBE | 2008-2009 |
| SAAB | 9-7X | 2008-2009 |
| SATURN | ASTRA | 2008-2009 |
| SATURN | AURA | 2008-2009 |
| SATURN | OUTLOOK | 2008-2009 |
| SATURN | RELAY | 2008 |
| SATURN | SKY | 2008-2009 |
| SATURN | VUE | 2008-2009 |
Condition
Some customers may comment on black smoke, rough idle, and minimal misfires on cold start.
Some customers may also state that the malfunction indicator lamp (MIL) is not illuminated.
Information
With the introduction of direct fuel injection systems, GM has revised the cold start control system to reduce cold start emissions. Quicker catalytic converter heating helps meet the ever-changing emission requirements and improve fuel economy.
SEOCONTENT-START
Service Bulletin Bulletin No.: 19-NA-044
Date: May, 2021
INFORMATION
Subject: Information on Black Smoke, Rough Idle and Minimal Misfires on Cold Start
This bulletin replaces PIP4919E, PIP5189C and PI1223B. Please discard PIP4919E, PIP5189C
and PI1223B.
Attention:This bulletin applies to all vehicle
models equipped Direct Injected (DI) gasoline
engines only.
Brand: Model:
Model Year: VIN:
Engine: Transmission:
from to from to
Buick GM
Passenger
Cars and
Light Duty
Trucks
2008 2021 — —
Direct
Injected (DI)
Gasoline
Only
—
Cadillac
Chevrolet
GMC
Involved Region or Country
North America, Europe, Russia, Middle East, Iraq, Israel, Palestine, Argentina, Brazil,
Bolivia, Chile, Colombia, Ecuador, Paraguay, Peru, Uruguay, Venezuela, Japan, Cadillac
Korea (South Korea), GM Korea Company, China, Taiwan, Thailand, Singapore,
Philippines, Australia/New Zealand, Egypt, Other Africa, South Africa
Condition
Some customers may comment on black smoke, rough idle, and minimal misfires on cold
start.
Some customers may also state that the malfunction indicator lamp (MIL) is not
illuminated.
Information
With the introduction of direct fuel injection systems, GM has revised the cold start control
system to reduce cold start emissions. Quicker catalytic converter heating helps meet the
ever-changing emission requirements and improve fuel economy.
Additional Information
A dual-pulse injection strategy is utilized during engine
cold start to reduce the time required to bring the
catalytic converter up to operating temperature. This
dual-pulse injection strategy lasts for about 60 seconds
on cold start.
This process will cause the customer to see increased
black smoke, soot, rough idle, or minimal misfires
during cold start and should be considered normal.
To verify that the dual-pulse injection is causing the
roughness or misfires with no codes set, you should
watch injector pulse width with the scan tool during the
concern. Dual pulse injector pulse width will be nearly
double that of normal idle. After 20 seconds the pulse
width will drop by about 50% and the engine idle will
smooth out. This is considered normal operation and no
repairs should be attempted.
This cold start strategy is enabled upon start up after
the engine has soaked for sufficient time such that the
catalytic converter requires rapid reactivation.
The high-pressure fuel pump test will run either as soon
as the dual pulse injection is completed, or during the
first stop after the engine is warmed up above about
155°F (68°C). This can feel like a slight idle roughness
as the high-pressure fuel pump is commanded to max
pressure and then shut off to measure pressure decay.
Note: The use of TOP TIER fuels lessens the rough
idle condition effects during dual pulse injection and the
fuel pump test by reducing the amount of carbon on
valve train components and a more complete
combustion leading to cleaner burn. Refer to the latest
version of Service Bulletin #05-06-04-022 — TOP TIER
Detergent Gasoline and TOP TIER Diesel Fuel
Information and Licensed Brands.
Page 2 May, 2021 Bulletin No.: 19-NA-044
All of these concerns are considered normal and no
repair attempts should be made.
Parts Information
No parts are required for this repair.
Version 2
Modified Released March 01, 2019
May 03, 2021 – Updated PI reference in Supersede statement, added the 2020–2021
Model Years and updated the Involved Region or Country section.
SEOCONTENT-END
1 Associated Document
Manufacturer Communications
Bulletin No.: 19-NA-044
Date: May, 2021
NHTSA ID Number: 10114113
Manufacturer Communication Number: PI1223B
Summary
This informational bulletin provides information on black smoke and rough idle on cold start.
1 Associated Document
Manufacturer Communications
Bulletin No.: PI1223B
Date: 05-May-2016
NHTSA ID Number: 10137933
Manufacturer Communication Number: PI1223A
Summary
This preliminary bulletin explains a normal condition of a customers concern of a rough idle and black smoke on cold starts.
1 Associated Document
Manufacturer Communications
Bulletin No.: PI1223A
Date: June, 2014
MC-10137933-9999.pdf 219.199KB
NHTSA ID Number: 10135220
Manufacturer Communication Number: PI1223
Summary
This preliminary bulletin explains a normal condition of a customers concern of a rough idle and black smoke on cold starts.
1 Associated Document
Manufacturer Communications
Bulletin No.: PI1223
Date: April, 2014
MC-10135220-9999.pdf 218.241KB
NHTSA ID Number: 10083782
Manufacturer Communication Number: PIP5189B
Summary
THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN ON THE STEPS TO DIAGNOSE AND REPAIR THE CONCERN OF BLACK SMOKE WHEN STARTING THE VEHICLE AFTER SITTING.
1 Associated Document
Service Bulletin Document
Bulletin No.: PIP5189B
Date: Apr-2016
NHTSA ID Number: 10078744
Manufacturer Communication Number: PIP-5189-B
Summary
THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN ON THE STEPS TO DIAGNOSE AND REPAIR THE CONCERN OF BLACK SMOKE WHEN STARTING THE VEHICLE AFTER SITTING.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP5189B
Date: 27-Apr-2016
NHTSA ID Number: 10095974
Manufacturer Communication Number: PIP5189A
Summary
THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ABOUT VEHICLE THAT MAY HAVE BLACK SMOKE ON A COLD START. A DUAL-PULSE INJECTION STRATEGY IS UTILIZED DURING ENGINE COLD START TO REDUCE THE TIME REQUIRED TO BRING THE CATALYTIC CONVERTER UP TO OPERATING TEMPERATURE. THIS SPLIT INJECTION STRATEGY LASTS FOR ABOUT 60 SECONDS ON COLD START. THIS PROCESS MAY CAUSE THE CUSTOMER TO SEE INCREASED BLACK SMOKE DURING COLD START AND SHOULD BE CONSIDERED NORMAL.
2 Associated Documents
Service Bulletin Document
Bulletin No.: PIP5189A
Date: Feb-2016
Manufacturer Communications
Bulletin No.: PIP5189A
Date: Feb-2016
NHTSA ID Number: 10111785
Manufacturer Communication Number: PIP5189
Summary
This Preliminary Information communication provides information to the technician about vehicle that may have black smoke on a cold start. A dual-pulse injection strategy is utilized during engine cold start to reduce the time required to bring the catalytic converter up to operating temperature. This split injection strategy lasts for about 60 seconds on cold start. This process may cause the customer to see increased black smoke during cold start and should be considered normal.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP5189
Date: Apr-2014
NHTSA ID Number: 10070036
Manufacturer Communication Number: PIP5189
Summary
SUMMARY TO BE PROVIDED ON A FUTURE DATE.
1 Associated Document
Service Bulletin Document
Bulletin No.: PIP5189
Date: April, 2014
NHTSA ID Number: 10114908
Manufacturer Communication Number: PIP4919E
Summary
This Preliminary Information communication provides information to the technician about vehicle that may have black smoke on a cold start. A dual-pulse injection strategy is utilized during engine cold start to reduce the time required to bring the catalytic converter up to operating temperature. This split injection strategy lasts for about 60 seconds on cold start. This process may cause the customer to see increased black smoke during cold start and should be considered normal.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP4919E
Date: Oct-2015
NHTSA ID Number: 10139389
Manufacturer Communication Number: PIP4919D
Summary
This Preliminary Information communication provides information to the technician about vehicle that may have black smoke on a cold start. A dual-pulse injection strategy is utilized during engine cold start to reduce the time required to bring the catalytic converter up to operating temperature. This split injection strategy lasts for about 60 seconds on cold start. This process may cause the customer to see increased black smoke during cold start and should be considered normal.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP4919D
Date: Mar-2015
NHTSA ID Number: 10111829
Manufacturer Communication Number: PIP4919C
Summary
This Preliminary Information communication provides information to the technician about vehicles that may have black smoke on a cold start. A dual-pulse injection strategy is utilized during engine cold start to reduce the time required to bring the catalytic converter up to operating temperature. This split injection strategy lasts for about 60 seconds on cold start. This process may cause the customer to see increased black smoke during cold start and should be considered normal.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP4919C
Date: Apr-2014
NHTSA ID Number: 10112019
Manufacturer Communication Number: PIP4919B
Summary
This Preliminary Information communication provides information to the technician about vehicles that may have black smoke on a cold start. A dual-pulse injection strategy is utilized during engine cold start to reduce the time required to bring the catalytic converter up to operating temperature. This split injection strategy lasts for about 60 seconds on cold start. This process may cause the customer to see increased black smoke during cold start and should be considered normal.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP4919B
Date: Jan-2014
NHTSA ID Number: 10111980
Manufacturer Communication Number: PIP4919A
Summary
This Preliminary Information communication provides information to the technician about vehicles that may have black smoke on a cold start. A dual-pulse injection strategy is utilized during engine cold start to reduce the time required to bring the catalytic converter up to operating temperature. This split injection strategy lasts for about 60 seconds on cold start. This process may cause the customer to see increased black smoke during cold start and should be considered normal.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP4919A
Date: Jan-2014
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