Chevrolet Silverado 1500 2018 — technical service bulletin
Bulletin 20NA139 · NHTSA communication 10178289 · issued Jun 22, 2020
Technical service bulletin
communication type
Electrical System
component
2018
model years
8
vehicle entries
Official summary
This technical bulletin provides a procedure to check and tighten the B+ at the starter for proper torque.
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.