Chevrolet Silverado 1500 2023 — technical service bulletin
Bulletin 662.20 · NHTSA communication 11037763 · issued Sep 8, 2026
Technical service bulletin
communication type
Unknown / Other
component
2023
model years
2
vehicle entries
Official summary
• Improvements to accuracy for Diesel Exhaust Fluid level shown in driver display • Improvements to the performance of Super Cruise
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.