Chevrolet Silverado 1500 2024–2025 — technical service bulletin
Bulletin 25-NA-170 · NHTSA communication 11024380 · issued Sep 3, 2025
Technical service bulletin
communication type
Engine
component
2024–2025
model years
4
vehicle entries
Official summary
This service bulletin provides a repair procedure to correct a customer concern of Loss of Air Conditioning, Weak Cooling, and/or Warm Air Coming from Vents.
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.