Chevrolet Express 2004 — technical service bulletin

Bulletin 040601020 · NHTSA communication 10012146 · issued Jun 1, 2004

Technical service bulletin

communication type

Engine and Engine Cooling

component

2004

model years

vehicle entries

Official summary

Engine oil leak near oil filter. *tt

Vehicles covered

2004 Chevrolet Express
2004 Chevrolet Silverado
2004 GMC Savana
2004 GMC Sierra

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.