# Over\-the\-air update 663.80

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Over\-the\-air update
- NHTSA id: 11036490
- Published by NHTSA: 2026\-08\-31
- Manufacturer's number: 663.80
- Manufacturer's date: 2026\-08\-12
- Campaign id or software version: 663.80
- NHTSA component: UNKNOWN OR OTHER
- Manufacturer's system: SAM, TPIM, WCM: SAM \(Side Access Module\), TPIM \(Traction Power Inverter Module\), WCM \(Wireless Charger Module\)

## NHTSA's summary

• Improvements to power door opening and closing performance • Improved vehicle performance when driving in Reverse on slippery surfaces • Better One\-Pedal Driving performance • Additional protection for battery health and prevention for battery drain • Improved accuracy for driver display messages • Better performance and reliability of wireless phone charging

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11036490-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11036490-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Vehicles listed

- 2026 CADILLAC CELESTIQ

JSON: [/v1/bulletins/11036490](/v1/bulletins/11036490)

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