Chevrolet Express 2003–2007 — technical service bulletin
Bulletin 060522006 · NHTSA communication 10020954 · issued Oct 1, 2006
Technical service bulletin
communication type
Service Brakes, Air
component
2003–2007
model years
10
vehicle entries
Official summary
Hydro-boost unit/power brake booster appears to be leaking. *kb
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.