Chevrolet Sierra 2000 — technical service bulletin
Bulletin 000603009A · NHTSA communication 619183 · issued Mar 1, 2001
Technical service bulletin
communication type
Engine and Engine Cooling
component
2000
model years
12
vehicle entries
Official summary
Some vehicles may exhibit lean hesitation, sag or stumble when coolant temperature is between -6 and +20 degrees celsius. *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.