TSB 25-NA-052 — Cadillac, Chevrolet and GMC Service bulletin
25-NA-052 is a service bulletin on file with NHTSA for 12 Cadillac, Chevrolet and GMC models, 2012–2014 model years, filed and re-filed as 2 documents. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. This bulletin advises the technician to flush the cooling system multiple times if oil has been found in the cooling system and replace the parts that may be contaminated due to oil in system.
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years 25-NA-052 names
Every document filed under 25-NA-052
Manufacturers re-issue a bulletin as the repair changes, and file separate copies for technicians and for owners. All of them carry the same number.
| Document ID | Filed | Type |
|---|---|---|
| 25-NA-052 | March 25, 2025 | Service bulletin |
| 25-NA-052 | March 4, 2025 | Service bulletin |
What 25-NA-052 covers
Engine — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB 25-NA-052?
25-NA-052 is a service bulletin filed with NHTSA by Cadillac, Chevrolet and GMC, covering 12 Cadillac, Chevrolet and GMC models across the 2012–2014 model years. NHTSA's summary reads: This bulletin advises the technician to flush the cooling system multiple times if oil has been found in the cooling system and replace the parts that may be contaminated due to oil in system.
Which vehicles does 25-NA-052 cover?
NHTSA's file names Cadillac CTS (2012); Chevrolet Camaro (2012); Chevrolet Colorado (2012–2014); Chevrolet Corvette (2012); Chevrolet Cruze (2012); Chevrolet Malibu (2012); Chevrolet Sonic (2012–2013); Chevrolet Trailblazer (2014); Chevrolet Traverse (2012); Chevrolet Volt (2013–2014), and 2 more vehicles listed on this page. 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 25-NA-052 a recall, and is the repair free?
No. 25-NA-052 is repair guidance the manufacturer sent its dealers, not a safety defect finding. You pay for the work unless the vehicle is still under warranty. Recall repairs, by contrast, are always free.
How do I get the full text of 25-NA-052?
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 25-NA-052, 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 25-NA-052. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.