Service bulletin 20NA166
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.
| Type | Service bulletin |
|---|---|
| NHTSA id | 10212560 |
| Published by NHTSA | 2022-05-31 |
| Manufacturer's number | 20NA166 |
| Manufacturer's date | 2021-12-09 |
| NHTSA component | ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS |
NHTSA's summary
This informational bulletin advises the technician of possible coolant entering the areas of the engine, either through failed parts or defects in the castings, that may be the cause of the concerns related to the MIL or the engine running rough.
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
Engine, Cooling system
| CADILLAC CTS | 2016, 2017, 2018, 2019 |
|---|---|
| CADILLAC ESCALADE | 2015, 2016, 2017, 2018, 2019, 2020 |
| CADILLAC ESCALADE | 2022 |
| CADILLAC ESCALADE ESV | 2015, 2016 (the catalog's model; the bulletin names a series or trim of it) |
| CADILLAC ESCALADE ESV | 2017, 2018, 2019, 2020, 2021, 2022 |
| CADILLAC ESCALADE NA | 2021 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET CAMARO | 2016, 2017, 2018, 2019, 2020, 2021, 2022 |
| CHEVROLET CORVETTE | 2016, 2017, 2018, 2019 |
| CHEVROLET SILVERADO 1500 | 2014 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 1500 | 2017, 2018, 2019, 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 2500 | 2015, 2016, 2017, 2018, 2019 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 4500 | 2019 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SUBURBAN | 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 |
| CHEVROLET TAHOE | 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 |
| GMC SIERRA 1500 | 2014 (the catalog's model; the bulletin names a series or trim of it) |
| GMC SIERRA 1500 | 2019, 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it) |
| GMC SIERRA 2500 | 2015, 2016, 2017, 2018 (the catalog's model; the bulletin names a series or trim of it) |
| GMC SIERRA DENALI | 2015, 2016, 2017, 2018, 2019 (the catalog's model; the bulletin names a series or trim of it) |
| GMC YUKON | 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 |
| GMC YUKON XL | 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| PIE0283 | 2024-04-08. Service bulletin. Engineering Information. |
|---|---|
| 16NA006 | 2023-12-11. Service bulletin. Coolant Leak Originating from Radiator Hose Clamp or Lower Water Pump Inlet Pipe |
| 22NA013 | 2022-05-31. Service bulletin. This technical bulletin provides a procedure for the technician to check and tighten the CAC plumbing if found loose. |
| 21NA237 | 2022-02-14. Service bulletin. THis technical bulletin provides a procedure to perform a cooling system flush to remove possible debris from the cooling system pipes. |
| 21NA257 | 2021-12-27. Service bulletin. This service bulletin provides a service procedure to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P3075 Set. |
| 21NA237 | 2021-12-27. Service bulletin. THis technical bulletin provides a procedure to perform a cooling system flush to remove possible debris from the cooling system pipes. |
| N202302720 | 2021-02-01. Service bulletin. Special Coverage. Certain vehicles may have a condition where the vehicle may overheat and enter a reduced power mode when driven on a track at sustained high speeds in high ambient temperatures. Dealers are to install an updated radiator package and, for automatic transmission vehicles, updated shift-point calibration software. The repairs will be made at no charge to the customer. The customer must provide evidence of an overheating condition in the form of one of the following: Diagnostic Trouble Code, photos, or videos. The dealer should make a copy of any customer evidence provided and file with the warranty claim. |
| 18NA103 | 2020-11-30. Service bulletin. This service bulletin provides information to correct a customer concern of an in-tank fuel pump whining noise, engine hard to start and/or stalls and Malfunction Indicator Lamp (MIL) is illuminated. |
| PIT5789 | 2020-11-16. Service bulletin. This Preliminary information communicates an issues with an SES MIL and DTC P2B87 setting. Engineering is working on releasing updated BCM cals to correct the concern. |
| PIP5684B | 2020-08-10. Service bulletin. This Preliminary information communicates the use of air leak diagnostic test tool CH-52250 in addition to the information found in the service manual. |