Chevrolet Sierra 2001 — technical service bulletin

Bulletin 020201 · NHTSA communication 618278 · issued Feb 2, 2001

Technical service bulletin

communication type

Engine and Engine Cooling

component

2001

model years

vehicle entries

Official summary

This service message is in regards to excessive vibration / surging of the 6600 duramax engine. *tt

Vehicles covered

2001 Chevrolet Sierra
2001 Chevrolet Silverado
2001 GMC Sierra
2001 GMC Silverado

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.