Has your truck gone thru the regen process on a regular basis?
This information is published for my 2008 LMM truck - yours may be different:
- Inspect for the following conditions, which may cause a diesel oxidation converter (DOC) to degrade:
- Off Road Fuel or Red Dye Fuel
- Low quality B-20 fuel
- Fuel Containing high sulfur content
- Engine oil or coolant consumption
- Leaking fuel injectors
Non-ULSD fuel was a concern back in 2008, but it is not illegal to manufacture or sell it in US or Canada.
During the conversion of the N.A. fuel supply there was a period of time both were available, the as the conversion was 'phased', there was a period of time when non-taxed (and usually dyed to identify it) fuel was LSD while rod fuel was ULSD.
Today, all US/Can fuel is ULSD.
Non-taxed fuel is still typically dyed so the 'revenuers' can identify it if/when they are doing roadside checks.
(Diesel that is not ULSD can still a concern for those that might be travelling in some areas of Mexico)
2018 GMC 2500 L5P CCSB 4x4 Denali - Mineral Metallic; previous '11 LML, '10 LMM and 04.5 LLY