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Service bulletin 990420002K

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10168212
Published by NHTSA2019-11-25
Manufacturer's number990420002K
Manufacturer's date2019-10-29
NHTSA componentPOWER TRAIN

NHTSA's summary

This informational bulletin provides information on Driveline Clunk Noise and what is acceptable and what is considered normal operations.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Transmission and driveline

Vehicles listed
BUICK CASCADA2016, 2017, 2018, 2019
BUICK ENCLAVE2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
BUICK ENCORE2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
BUICK ENVISION2016, 2017, 2018, 2019, 2020
BUICK LACROSSE2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
BUICK LUCERNE2010, 2011
BUICK LUCERNE2012
BUICK REGAL2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
BUICK VERANO2012, 2013, 2014, 2015, 2016, 2017
CADILLAC ATS2013, 2014, 2015, 2016, 2017, 2018, 2019
CADILLAC CT42020
CADILLAC CT52020
CADILLAC CT62016, 2017, 2018, 2019, 2020
CADILLAC CTS2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
CADILLAC DTS2010, 2011
CADILLAC ELR2014, 2015, 2016, 2017
CADILLAC ESCALADE2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
CADILLAC ESCALADE ESV2010, 2011, 2012, 2013, 2014, 2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
CADILLAC ESCALADE ESV2017, 2018, 2019, 2020
CADILLAC ESCALADE EXT2010, 2011, 2012, 2013 (the catalog's model; the bulletin names a series or trim of it)
CADILLAC SRX2010, 2011, 2012, 2013, 2014, 2015, 2016
CADILLAC STS2010, 2011
CADILLAC XT42019, 2020
CADILLAC XT52017, 2018, 2019, 2020
CADILLAC XT62020
CADILLAC XTS2013, 2014, 2015, 2016, 2017, 2018, 2019
CHEVROLET 35002016
CHEVROLET 35002018
CHEVROLET 4500HD2019, 2020
CHEVROLET 5500HD2019, 2020
CHEVROLET AVALANCHE2010, 2011, 2012, 2013
CHEVROLET AVEO2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
CHEVROLET BLAZER2019, 2020
CHEVROLET BOLT EV2017, 2018, 2019, 2020
CHEVROLET CAMARO2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
CHEVROLET CAPRICE2011 to 2017
CHEVROLET CAPTIVA2012 to 2018
CHEVROLET CAPTIVA SPORT2010, 2011, 2012
CHEVROLET CHEVEROLET SS2014 to 2017
CHEVROLET CHEYENNE2017
CHEVROLET CITY EXPRESS2015, 2016
CHEVROLET COBALT2010
CHEVROLET COLORADO2010, 2011, 2012
CHEVROLET COLORADO2014
CHEVROLET COLORADO2015, 2016, 2017, 2018, 2019, 2020
CHEVROLET CORVETTE2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
CHEVROLET CRUZE2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
CHEVROLET EQUINOX2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
CHEVROLET EXPRESS2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
CHEVROLET HHR2010, 2011
CHEVROLET IMPALA2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
CHEVROLET LOW CAB FORWARD 45002017 to 2018
CHEVROLET LOW CAB FORWARD 55002017 to 2018
CHEVROLET LOW CAB FORWARD 65002018
CHEVROLET MALIBU2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
CHEVROLET N3002014 to 2016
CHEVROLET N3002018
CHEVROLET N300 MAX2017
CHEVROLET ORLANDO2017
CHEVROLET S102016 to 2018
CHEVROLET SILVERADO2017
CHEVROLET SILVERADO 15002010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 25002010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 35002010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 45002019, 2020 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SONIC2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
CHEVROLET SPARK2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
CHEVROLET SPARK EV2014, 2015, 2016, 2017 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SUBURBAN2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
CHEVROLET T SERIES2010
CHEVROLET TAHOE2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
CHEVROLET TRAILBLAZER2017 to 2019
CHEVROLET TRAVERSE2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
CHEVROLET TRAX2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
CHEVROLET VOLT2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
CHEVROLET W-SERIES2010
GMC ACADIA2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
GMC CANYON2010, 2011, 2012
GMC CANYON2015, 2016, 2017, 2018, 2019, 2020
GMC G VAN BUS2010
GMC SAVANA2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
GMC SIERRA2017
GMC SIERRA 15002010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 25002010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 35002010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA DENALI2010, 2011, 2012, 2013 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA DENALI2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA DENALI2018, 2019 (the catalog's model; the bulletin names a series or trim of it)
GMC TERRAIN2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
GMC TOPKICK2010
GMC W-SERIES2010
GMC YUKON2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
GMC YUKON DENALI2010, 2011, 2012, 2013 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON DENALI XL2010, 2011, 2012, 2013 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON XL2010, 2011
GMC YUKON XL2012, 2013, 2014 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON XL2015, 2016, 2017, 2018, 2019, 2020
HUMMER H22010
HUMMER H32010
ISUZU T SERIES2010
PONTIAC G32010
PONTIAC G52010
PONTIAC G62010
PONTIAC G82010
PONTIAC SOLSTICE2010
PONTIAC VIBE2010
SAAB 9-52010
SATURN ASTRA2010
SATURN AURA2010
SATURN OUTLOOK2010
SATURN SKY2010
SATURN VUE2010

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
26V2890002026-05-07. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE)
20260602026-02-12. Powertrain
26V0830002026-02-12. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:VALVES/VALVE BODY
20251182025-03-06. Powertrain
25V1480002025-03-06. POWER TRAIN:AUTOMATIC TRANSMISSION
20246372024-10-24. Powertrain
24V7970002024-10-24. POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:VALVES/VALVE BODY; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE
20205202020-10-29. Powertrain
20V6680002020-10-29. POWER TRAIN:AUTOMATIC TRANSMISSION
20205052020-10-23. Powertrain

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
24-NA-2622025-12-03. Service bulletin. This bulletin helps aid the tech in possible 10L100 transmission noise that may be normal or abnormal depending on the concern noted.
23-NA-1192025-10-16. Service bulletin. This service bulletin provides service procedure information to correct a customer concern of Shift to Park Displayed on DIC When Vehicle is in- Park, No Start - DTC B000A Set.
N242454441 -032025-10-09. Service campaign. Certain vehicles listed above, may have a condition where the transmission control valve has worn, resulting in a gradual loss of pressure within the valve. The effects can cause harsh shifting, setting a service engine soon message, reduced engine performance or P0747 diagnostic trouble code. Dealers are to install a new control valve body. The repairs will be made at no charge to the customer.
21-NA-2382025-07-07. Service bulletin. This technical bulletin provides a procedure to inspect the front pump of the transmission for a possible leak.
PI0281L2025-06-12. Service bulletin. This preliminary informational (PI) bulletin provides information to dealership personnel that may be helpful when addressing underbody component corrosion with customers.
N242480631-022025-05-27. Service campaign. Certain vehicles listed above, may have a condition where the transmission control valve has worn, resulting in a gradual loss of pressure within the valve. The effects can cause harsh shifting, setting a service engine soon message, reduced engine performance or P0747 diagnostic trouble code. This special coverage covers vehicles that return after TCM Update Product Safety N242480630 and have P0747 condition described above for a period of 15 years or 150,000 miles (240,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after March 6, 2025, are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to March 6, 2025, must be submitted to the Service Contract provider. Vehicle owners or lessees who paid for repairs referenced in this Special Coverage (“Customers”) are eligible for reimbursement of their reasonable and customary expenses in accordance with the procedures specified below. The conditional right to reimbursement is provided by GM solely in the interest of customer satisfaction and is personal to Customers. Customers may not assign and GM does not consent to any assignment of any Customer’s right to submit reimbursement claims, or to receive reimbursement, or any other rights granted by this Special Coverage to any third party, including but not limited to service contract providers, and this Special Coverage is not intended to and does not confer any third party beneficiary, subrogation or contribution rights, or any other rights to reimbursement, against GM, whether in law, equity or otherwise, on any third parties. Dealers are to install a new control valve body. The repairs will be made at no charge to the customer.
N242480631-012025-05-22. Service campaign. Certain vehicles listed above, may have a condition where the transmission control valve has worn, resulting in a gradual loss of pressure within the valve. The effects can cause harsh shifting, setting a service engine soon message, reduced engine performance or P0747 diagnostic trouble code. This special coverage covers vehicles that return after TCM Update Product Safety N242480630 and have P0747 condition described above for a period of 15 years or 150,000 miles (240,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after March 6, 2025, are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to March 6, 2025, must be submitted to the Service Contract provider. Vehicle owners or lessees who paid for repairs referenced in this Special Coverage (“Customers”) are eligible for reimbursement of their reasonable and customary expenses in accordance with the procedures specified below. The conditional right to reimbursement is provided by GM solely in the interest of customer satisfaction and is personal to Customers. Customers may not assign and GM does not consent to any assignment of any Customer’s right to submit reimbursement claims, or to receive reimbursement, or any other rights granted by this Special Coverage to any third party, including but not limited to service contract providers, and this Special Coverage is not intended to and does not confer any third party beneficiary, subrogation or contribution rights, or any other rights to reimbursement, against GM, whether in law, equity or otherwise, on any third parties. Dealers are to install a new control valve body. The repairs will be made at no charge to the customer.
23-NA-1852025-04-28. Service bulletin. This service bulletin helps diagnose/reduce possible CCND issues on Transfer Cases - Service 4WD on DIC, Intermittent Failures, Noise Concerns, Driveline/Steering Vibration/Shudder, Intermittent DTCs/MIL Illuminated, Engagement/Disengagement/Ratcheting Concerns.
23-NA-1562025-04-28. Service bulletin. This service bulletin informs the technician on the running changes to the M1L, M1M and MLH automatic transmission.
19-NA-2002025-04-10. Service bulletin. This service bulletin provides a repair procedure to correct a customer concern of start/stop inoperative, MIL illuminated w/DTC P2797.