Service bulletin PIC6638
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 | Service bulletin |
|---|---|
| NHTSA id | 11027946 |
| Published by NHTSA | 2026-02-01 |
| Manufacturer's number | PIC6638 |
| Manufacturer's date | 2026-01-28 |
| NHTSA component | UNKNOWN OR OTHER |
NHTSA's summary
This Preliminary information communicates to the technician the repair direction needed to address an inaccurate speed limit sign displayed on instrument cluster.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
| CADILLAC CELESTIQ | 2026 |
|---|---|
| CADILLAC ESCALADE | 2026 |
| CADILLAC ESCALADE ESV | 2026 |
| CADILLAC ESCALADE IQ | 2026 |
| CADILLAC LYRIQ | 2026 |
| CADILLAC OPTIQ | 2026 |
| CADILLAC VISTIQ | 2026 |
| CHEVROLET EQUINOX EV | 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO EV | 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET TRAVERSE | 2026 |
| GMC ACADIA | 2026 |
| GMC HUMMER EV PICKUP | 2026 |
| GMC HUMMER EV SUV | 2026 |
| GMC SIERRA EV | 2026 (the catalog's model; the bulletin names a series or trim of it) |
| GMC YUKON | 2026 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.