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Service bulletin 26-03

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)
TypeService bulletin
NHTSA id10075445
Published by NHTSA2016-07-07
Manufacturer's number26-03
Manufacturer's date2015-11-01
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION

NHTSA's summary

SUMMARY TO BE PROVIDED ON A FUTURE DATE.

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Transmission and driveline, Automatic transmission

Vehicles listed
WESTERN STAR 47002009, 2010, 2011, 2012, 2013, 2014, 2015, 2016

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

Other bulletins for the same vehicles and component
0402-182018-10-01. Service bulletin. 0402-18 SPN 625 (CPC) (GHG14)
0405-182018-06-18. Service bulletin. 0405-18 Symptom Diagnostics - Range Up or Down Shift Issue
0402-182018-06-18. Service bulletin. 0402-18 SPN 625 (CPC) (GHG14)
0406-172018-06-11. Service bulletin. SPN 521221 (TCM)
0133-172018-04-16. Service bulletin. 0133-17 SPN 625 (CPC) (GHG17)
0132-172018-04-16. Service bulletin. 0132-17 SPN 521005 (CPC3) (GHG17)
0131-172018-04-16. Service bulletin. 0131-17 SPN 521054 (CPC3) (GHG17)
0125-172018-04-16. Service bulletin. 0125-17 SPN 4817 (MCM) (GHG17)
0124-172018-04-16. Service bulletin. 0124-17 SPN 3720 FMI 14 - (MCM) (GHG17)
0532-162018-03-13. Service bulletin. SPN 524286 (TCM)