LML Duramax full delete kit with EFI Live AutoCal V3 (2011-2015)
The 2011, 2012, 2013, 2014, 2015 6.6 LML Duramax Delete Kit with EFI Live AutoCal V3 tuner combines custom tuning with DPF, DEF/SCR, and EGR removal hardware for off-road Pickup applications. The kit reduces factory exhaust restriction, stops regeneration after correct calibration, and offers selectable exhaust, muffler, and TCM tuning configurations.
What's included in delete kit
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EFI Live AutoCal V3 Tuner - Ships blank and receives vehicle-specific custom tunes after the required truck and device information is supplied. AutoCal V3 supports flashing, diagnostics, data logging, and SOTF on supported Pickup applications.
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DPF/CAT Delete Pipe - A 4-inch T-409 stainless steel pipe replaces the particulate filter and catalyst section while connecting to the factory downpipe through the V-band flange.
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4-Inch Exhaust System - Downpipe-back option with increased flow and a balanced sound.
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5-Inch Exhaust System - Larger option for maximum flow and a deeper tone.
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LML EGR delete kit - Removes the EGR valve and cooler and includes the required block-off plate, gaskets, clamps, and mounting hardware.
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SOTF Switch - Included for supported Pickup tuning and provides access to the available power levels without loading a separate calibration each time.
The current Duramax kit is configured for 2011-2014 and early-2015 V-band Pickup trucks.
Vehicle compatibility
The 6.6 Duramax kit fits the following Pickup applications:
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Years: 2011, 2012, 2013, 2014, early 2015
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Makes: Chevrolet, GMC
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Models: Silverado 2500HD, Silverado 3500HD, Sierra 2500HD, Sierra 3500HD
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Engine: 6.6L LML Duramax
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Transmission: Allison automatic
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Body: Pickup
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Exhaust Connection: V-band flange
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Cab & Chassis: Not supported by this full hardware kit
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Late 2015 / 2016: Requires the separate 3-bolt-flange configuration
No separate ECM unlock is required for this application. Late-production 2015 Duramax trucks should not use the early-2015 V-band exhaust hardware.
Performance & tuning
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No forced regeneration
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Stronger towing response
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Reduced backpressure
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Potential fuel economy gains
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Fewer emissions derates
The EFI Live Duramax LML tuner uses vehicle-specific tuning files. Available horsepower depends on whether optional TCM tuning is selected.
Without TCM tuning
|
Power Level |
+HP |
Best for |
|---|---|---|
|
Stock |
0 HP |
Factory-level output |
|
Level 2 |
+30 HP |
Daily driving |
|
Level 3 |
+65 HP |
Towing |
|
Level 4 |
+100 HP |
Street performance |
|
Level 5 |
+130 HP |
Maximum output |
With TCM tuning
|
Power Level |
+HP |
Best for |
|---|---|---|
|
Level 1 |
0 HP |
Factory-level output |
|
Level 2 |
+50 HP |
Daily driving / towing |
|
Level 3 |
+100 HP |
Street use |
|
Level 4 |
+150 HP |
Higher-output performance |
|
Level 5 |
+200 HP |
Maximum available output |
|
Metric |
Expected Change |
Notes |
|---|---|---|
|
DPF regeneration |
Eliminated |
With correct calibration |
|
DEF refills |
Eliminated |
After DEF/SCR removal |
|
Fuel economy |
About 3-6 MPG potential improvement |
Depends on tires, load, tuning, and driving style |
|
EGTs |
Potentially reduced |
Approximately 100-200°F lower under load, depending on tune, load, exhaust setup, and engine condition |
|
Backpressure |
Reduced |
Factory aftertreatment restriction removed |
|
Limp mode / derate |
Emissions-related triggers addressed |
Unrelated faults remain active |
Which configuration should you choose?
|
Option |
Choice |
Recommended for |
|---|---|---|
|
Transmission Tuning |
None |
Engine tuning without an added TCM calibration |
|
Add TCM Tune |
Higher power levels and matched transmission tuning |
|
|
Exhaust |
DPF Delete Pipe |
Retaining more of the factory exhaust |
|
4-Inch |
Balanced flow and sound |
|
|
5-Inch |
Maximum flow and deeper tone |
|
|
Muffler |
Straight Pipe |
Maximum sound |
|
With Muffler |
Reduced volume and drone |
How the delete kit works on your GMC Duramax
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Flashes EFI Live tuning before hardware removal.
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Removes DPF and catalyst restriction to stop regeneration.
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Completes the DEF delete and stops DEF refills.
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Eliminates EGR recirculation to reduce soot and clogging.
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Matches calibration to airflow for improved throttle response.
Installation information
The Duramax delete kit includes installation guidance and uses bolt-on exhaust and EGR hardware. Owners with solid mechanical skills can complete the hardware work, but the correct calibration must be installed before emissions equipment is removed.
Clear all diagnostic codes before tuning and do not change emissions hardware first. AutoCal V3 can be disconnected after programming is complete. The supplied setup workflow uses EFI Live V8 Scan & Tune to transfer the prepared file to AutoCal V3.
Technical specifications
|
Specification |
Detail |
|---|---|
|
Fitment Years |
2011-early 2015 |
|
Engine |
6.6L LML Duramax |
|
Tuner |
EFI Live AutoCal V3 |
|
Tuning Type |
Custom vehicle-specific files |
|
SOTF |
Supported on Pickup applications |
|
ECM Unlock |
Not required |
|
Exhaust Connection |
V-band flange |
|
Exhaust Option |
DPF Delete Pipe / 4-Inch / 5-Inch |
|
Muffler Option |
Straight Pipe / With Muffler |
|
Transmission Tuning |
None / Add TCM Tune |
|
Delete Pipe Material |
T-409 stainless steel |
|
Systems Removed |
DPF / DEF-SCR / EGR |
|
Application |
Off-road |
Not sure whether your LML uses the V-band connection or requires the later 3-bolt hardware? Send Dieselino the VIN and truck configuration before ordering.