July 21, 2026 Service bulletin

This PI provides diagnostic tips for diagnosing electric trailer brakes issues.

Chevrolet technical service bulletin PIT5509N for 2014-2026 Chevrolet Silverado 1500, 2015-2026 Chevrolet Tahoe and 2014-2026 GMC Sierra 1500 and others.

Bulletin number: PIT5509N
Component: Unknown or other
Summary: This PI provides diagnostic tips for diagnosing electric trailer brakes issues.

Vehicles covered

Chevrolet Silverado 1500 2014-2026 2019 2020 2021 2022 2023 2024 2025 2026
Chevrolet Tahoe 2015-2026 2019 2020 2021 2022 2023 2024 2025 2026
GMC Sierra 1500 2014-2026 2019 2020 2021 2022 2023 2024 2025 2026
Chevrolet Suburban 2015-2024 2017 2018 2019 2020 2021 2022 2023 2024
GMC Yukon 2015-2026 2019 2020 2021 2022 2023 2024 2025 2026
Chevrolet Silverado 2500 2015-2026 2019 2020 2021 2022 2023 2024 2025 2026
Chevrolet Colorado 2015-2026 2019 2020 2021 2022 2023 2024 2025 2026
GMC Yukon XL 2015-2026 2019 2020 2021 2022 2023 2024 2025 2026
GMC Sierra 2500 2015-2026 2019 2020 2021 2022 2023 2024 2025 2026
Cadillac Escalade 2021-2026 2021 2022 2023 2024 2025 2026
GMC Canyon 2015-2026 2019 2020 2021 2022 2023 2024 2025 2026
Chevrolet Suburban 1500 2025-2026 2025 2026
Chevrolet Silverado 3500 2015-2026 2019 2020 2021 2022 2023 2024 2025 2026
GMC Sierra 3500 2015-2026 2019 2020 2021 2022 2023 2024 2025 2026
Cadillac Escalade ESV 2021-2026 2021 2022 2023 2024 2025 2026

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