Chevrolet Silverado 2007–2008 — technical service bulletin
Bulletin 07-06-04-033A · NHTSA communication 10025681 · issued May 1, 2008
Technical service bulletin
communication type
Engine and Engine Cooling
component
2007–2008
model years
4
vehicle entries
Official summary
Lmm, clean exhaust filter light illuminated, mil/ses light illuminated with dtc(s) p244b and/or p2463 set (perform all si diagnostics for dtc(s) set, if ntf, replace air filter). Vehicles with 6.6l duramax diesel engine. *pe
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.