Chevrolet Silverado 2500 2026 — technical service bulletin
Bulletin 662.21 · NHTSA communication 11035451 · issued Jul 30, 2026
Technical service bulletin
communication type
Unknown OR Other
component
2026
model years
2
vehicle entries
Official summary
Improvements to accuracy for Diesel Exhaust Fluid level shown in driver display.
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.