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September 8, 2026 Over-the-air update

• Improvements to accuracy for Diesel Exhaust Fluid level shown in driver display • Improvements to the...

Chevrolet technical service bulletin 662.20 for 2023 Chevrolet Silverado 1500 and 2023 GMC Sierra 1500.

Bulletin number
662.20 (662.20)
Component
Unknown or other
Summary
• Improvements to accuracy for Diesel Exhaust Fluid level shown in driver display • Improvements to the performance of Super Cruise

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