Chevrolet Blazer 1998 — technical service bulletin
Bulletin 990842004 · NHTSA communication 606520 · issued Jun 1, 1999
Technical service bulletin
communication type
Exterior Lighting
component
1998
model years
2
vehicle entries
Official summary
Customers may comment on inoperative daytime runnng lamps (drl) on some models built between vin breakpoints wk247020 - wk258202. *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.