• Improves Check Engine Light accuracy
Chevrolet technical service bulletin N25-250403 for 2025 Chevrolet Silverado 1500 and 2025 GMC Sierra 2500.
- Bulletin number
- N25-250403 (N25-250403)
- Component
- Unknown or other
- Summary
- • Improves Check Engine Light accuracy. • Improves behavior of aero shutter system in freezing temperatures. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.
Vehicles covered
- Chevrolet Silverado 1500 2025 2025
- GMC Sierra 2500 2025 2025
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