Chevrolet C4500 2006 — technical service bulletin
Bulletin 3721 · NHTSA communication 10019444 · issued Mar 15, 2006
Technical service bulletin
communication type
Electrical System
component
2006
model years
8
vehicle entries
Official summary
Service vme - glow plug control module calibrations on tis data 2.5. *tt
Vehicles covered
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.