Chevrolet Silverado 1500 2014–2018 — technical service bulletin
Bulletin 20NA185 · NHTSA communication 10181711 · issued Sep 10, 2020
Technical service bulletin
communication type
Equipment
component
2014–2018
model years
20
vehicle entries
Official summary
This technical procedure provides a procedure to replace the front oil crank seal on remanufactured engines only, if found the cause of the customers concern.
Vehicles covered
- 2014 Chevrolet Silverado 1500
- 2017 Chevrolet Silverado 1500
- 2018 Chevrolet Silverado 1500
- 2014 Chevrolet Silverado 2500
- 2015 Chevrolet Silverado 2500
- 2016 Chevrolet Silverado 2500
- 2017 Chevrolet Silverado 2500
- 2018 Chevrolet Silverado 2500
- 2015 Chevrolet Tahoe
- 2014 GMC Sierra 1500
- 2015 GMC Sierra 2500
- 2016 GMC Sierra 2500
- 2017 GMC Sierra 2500
- 2018 GMC Sierra 2500
- 2015 GMC Sierra Denali
- 2016 GMC Sierra Denali
- 2017 GMC Sierra Denali
- 2018 GMC Sierra Denali
- 2015 GMC Yukon
- 2015 GMC Yukon XL
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.