Chevrolet Silverado 2017–2018 — technical service bulletin
Bulletin 18NA085 · NHTSA communication 10137311 · issued Mar 16, 2018
Technical service bulletin
communication type
Engine and Engine Cooling
component
2017–2018
model years
4
vehicle entries
Official summary
This informational bulletin helps the technician on how to determine the difference in small, med, to large leaks in induction or exhaust systems when using a soapy solution or smoke.
Vehicles covered
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.