Service bulletin 18-057-17

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10138907
Published by NHTSA	2018-06-04
Manufacturer's number	18-057-17
Manufacturer's date	2017-06-09
NHTSA component	POWER TRAIN

NHTSA's summary

Flash: Powertrain Diagnostic and System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. The following software enhancements are available:Allow the throttle body to be cycled while the engine is off, for diagnostic purposes. Improved vehicle acceleration at low speed while towing. Allows transmission gear shifting while in limp-in mode, rather than a fixed gear.

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.

Components

Transmission and driveline

Vehicles listed
JEEP GRAND CHEROKEE	2017

Listing a model year does not mean every vehicle of it is concerned: the document says which.

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