WenmarOpen by Wenmar Pro

Service bulletin 000503

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 id613941
Published by NHTSA2000-09-21
Manufacturer's number000503
Manufacturer's date2000-06-01
NHTSA componentPOWER TRAIN:MANUAL TRANSMISSION

NHTSA's summary

SOME VEHICLE OWNERS MAY REPORT A LOSS OF TRANSMISSION FLUID WITH NO VISIBLE SIGNS OF LEAKAGE. ALSO THERE MAY BE TRANSMISSION FLUID IN THE GEARED HUBS OR AIR CLEANER HOUSING, A TRANSMISSION FLUID LEAK IN THE AREA OF THE TRANSFER CASE SEALS WITH NO APPARENT DAMAGE TO THE SEAL, OR THE TRANSFER CASE FLUID LEVEL SIGNIFICANTLY OVER FULL WHEN CHECKED ON MODELS WITH VIN 188385 AND BELOW AND WITH TRANSFER CASES BUILT PRIOR TO FEBRUARY 4, 2000. *TT

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, Manual transmission

Vehicles listed
AM GENERAL HUMMER

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