TSB 663.11 — Chevrolet and GMC Software update
663.11 is a software update on file with NHTSA for 2 Chevrolet and GMC models, 2023 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. This update contains a required software change to help improve the overall software update and diagnostics process. Be sure to install this update to be able to receive future software updates.
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Worth checking your VIN against. 663.11 is filed as a software update, 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 663.11 names
| Vehicle | Model years |
|---|---|
| Chevrolet Colorado | 2023 |
| GMC Canyon | 2023 |
Every document filed under 663.11
| Document ID | Filed | Type |
|---|---|---|
| 663.11 | June 17, 2026 | Software update |
Questions buyers ask
What is TSB 663.11?
663.11 is a software update filed with NHTSA by Chevrolet and GMC, covering 2 Chevrolet and GMC models across the 2023 model years. NHTSA's summary reads: This update contains a required software change to help improve the overall software update and diagnostics process. Be sure to install this update to be able to receive future software updates.
Which vehicles does 663.11 cover?
NHTSA's file names Chevrolet Colorado (2023); GMC Canyon (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 663.11 a recall, and is the repair free?
663.11 is filed as a software update, 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 663.11?
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 663.11, 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 663.11. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.