Chevrolet C1 1999 — technical service bulletin
Bulletin 990850004 · NHTSA communication 606575 · issued Apr 1, 1999
Technical service bulletin
communication type
Seats
component
1999
model years
8
vehicle entries
Official summary
Subject regarding seat noise / vibration - creak in front seat cushion, rattle / vibration in 40% front seat, jingle in 20% folding center seat. *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.