TSB N252508341 — Cadillac, Chevrolet and GMC Service campaign
N252508341 is a service campaign on file with NHTSA for 6 Cadillac, Chevrolet and GMC models, 2021–2023 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. Certain vehicles listed above, may have a condition that could cause the engine coolant control valve to fail an onboard vehicle diagnostic test. If this condition were to occur, the Malfunction Indicator Lamp (Check Engine Light) will illuminate, and a diagnostic trouble code…
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Worth checking your VIN against. N252508341 is filed as a service campaign, which unlike an ordinary bulletin can mean free or reimbursed work when a vehicle qualifies. Ask a dealer using the document ID below, and check open recalls separately at nhtsa.gov/recalls.
Vehicles and model years N252508341 names
| Vehicle | Model years |
|---|---|
| Cadillac Escalade | 2021, 2022, 2023 |
| Chevrolet Silverado 1500 | 2021, 2022 |
| Chevrolet Suburban | 2021, 2022, 2023 |
| Chevrolet Tahoe | 2021, 2022, 2023 |
| GMC Sierra 1500 | 2021, 2022 |
| GMC Yukon | 2021, 2022, 2023 |
Every document filed under N252508341
| Document ID | Filed | Type |
|---|---|---|
| N252508341 | September 16, 2025 | Service campaign |
What N252508341 covers
Engine — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB N252508341?
N252508341 is a service campaign filed with NHTSA by Cadillac, Chevrolet and GMC, covering 6 Cadillac, Chevrolet and GMC models across the 2021–2023 model years. NHTSA's summary reads: Certain vehicles listed above, may have a condition that could cause the engine coolant control valve to fail an onboard vehicle diagnostic test. If this condition were to occur, the Malfunction Indicator Lamp (Check Engine Light) will illuminate, and a diagnostic trouble code…
Which vehicles does N252508341 cover?
NHTSA's file names Cadillac Escalade (2021–2023); Chevrolet Silverado 1500 (2021–2022); Chevrolet Suburban (2021–2023); Chevrolet Tahoe (2021–2023); GMC Sierra 1500 (2021–2022); GMC Yukon (2021–2023). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.
Is TSB N252508341 a recall, and is the repair free?
N252508341 is filed as a service campaign, not a recall — but this is the kind of communication that can mean free or reimbursed work if your VIN qualifies. Take the number to a dealer and ask. Recalls are separate and always free; check yours by VIN at nhtsa.gov/recalls.
How do I get the full text of N252508341?
Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under N252508341, its date, and NHTSA's own summary from the public file.
Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under N252508341. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.