What's the difference between DPF delete and EGR delete?

DPF delete removes the diesel particulate filter and its regeneration cycles, improving fuel economy and eliminating soot buildup. EGR delete removes exhaust gas recirculation, which cools incoming air and reduces combustion temperatures. Both delete tunes typically remove both systems since they're tied to the same emissions strategy. You get cleaner intake, better cooling, and no more regen interruptions.

Will delete tune software trigger a check engine light?

A quality delete tune calibrates your Duramax's computer to run without DPF and EGR sensors reporting to the ECU. This means no fault codes. Lower-quality tunes or incomplete deletes can throw codes. Buy from reputable tuners with proven track records on your engine generation.

Can I switch between delete tunes and stock tuning?

Yes. Most tuning platforms like EZ LYNK and EFI Live let you store multiple tune files. You can flash between delete and stock tunes whenever you want, though permanently deleting hardware (pipes, filters) means you can't truly go back. Tune-only deletes are reversible.

Which delete tune software is best for my 2011-2016 LML Duramax?

Both EZ LYNK AUTO AGENT and EFI Live Autocal V3 are proven platforms with lifetime support. EZ LYNK is more user-friendly for beginners; EFI Live offers deeper tuning customization. Both remove DPF, EGR, and SCR (selective catalytic reduction) restrictions. Your choice depends on whether you want simplicity or advanced parameters.

Do I need to delete the DEF system if I delete the DPF?

Yes. DEF (diesel exhaust fluid) injection is part of the SCR system, which works downstream of the DPF. A complete delete removes DPF, EGR, and SCR together. Leaving DEF injectors in place without a working SCR system wastes DEF and causes complexity. Full system deletes are cleaner and more reliable.

Is delete tune software legal?

Delete tunes are not street-legal in most U.S. states and violate EPA emissions standards. They are intended for off-road, competition, and private property use only. Always check your local and federal regulations before purchasing. We cannot advise on legality in your jurisdiction.

What happens to fuel economy after a delete tune?

Expect 2-5 MPG gains depending on your truck, driving style, and tune aggressiveness. Removing DPF regeneration cycles (which consume extra fuel to heat the filter) accounts for most of the improvement. Over a year, these gains offset the tune software cost significantly.