Chevrolet Silverado 2001–2005 — technical service bulletin
Bulletin 3155 · NHTSA communication 10014863 · issued May 11, 2005
Technical service bulletin
communication type
Electrical System
component
2001–2005
model years
10
vehicle entries
Official summary
No shift, speedometer erratic/inoperative, p0721 c0237 p0500 c0055. *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.