Service bulletins for the 2018 Cadillac CT6
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.
1096 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Hybrid and electric drive are shown. Show all
| N202206490 | 2020-07-20. Service bulletin. ENGINE; HYBRID PROPULSION SYSTEM: INVERTER. Certain vehicles equipped with the hybrid propulsion ? plug-in identifier (RPO HP9) may experience certain circumstances where the engine may not start as planned and the vehicle will run only on battery power. DTC P0AB9 may also set. Dealers are to reprogram the drive motor power inverter module. |
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| PIC6231A | 2017-11-14. Service bulletin. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY. This Preliminary Information communication provides information to the technician about vehicles EV range is less than expected, or the estimated EV range on the display is greater than the actual range achieved. Dealer should walk the customer though using the energy screen. The energy screen will help the customer understand were there battery energy is being used. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.