Isuzu Ascender 2003–2006 — technical service bulletin
Bulletin 0601001 · NHTSA communication 10019957 · issued Apr 1, 2006
Technical service bulletin
communication type
Engine and Engine Cooling
component
2003–2006
model years
4
vehicle entries
Official summary
Operating characteristics of the electro-viscous (ev) fan clutch and diagnostic tips for cooling fan noise, delayed transmission shifts and/or engine revving too high. *tt
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.