Sierra 3500 4WD V8-6.6L DSL Turbo (2007)
4. Once this occurs, self cleaning of the DPF is no longer possible and dealer service will be necessary.
5. Possible irreversible damage to the DPF may occur, requiring repair or replacement.
6. Advise the customer that if following the diagnostic procedure for DTC P2463 in SI results in a DPF system malfunction NOT BEING found,
the Diesel Particulate Filter (DPF) Service Regeneration SHOULD NOT BE CHARGED TO GM WARRANTY.
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