Chevrolet Silverado 1500 2020 — technical service bulletin
Bulletin 20-NA-066 · NHTSA communication 10247191 · issued Dec 6, 2023
Technical service bulletin
communication type
Engine and Engine Cooling
component
2020
model years
2
vehicle entries
Official summary
This service bulletin provides a procedure to program the glow plug control module to correct a customer concern of a Malfunction Indicator Lamp Illuminated with One or More Glow Plug Control DTCs Set.
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.