EZ LYNK Auto Agent 3: Check Coverage Before You Check the Price

We get it: three versions with near-identical names look like one tuner wearing three price tags. Pick the wrong one and you end up with a slick little box on the workbench and a truck that hasn't moved an inch. Let's break it down in the sequence a real build runs: which version fits which truck, what lands in the box, how much each tune adds, how the app runs the show, what the install looks like, and which one we'd hand you across the counter.

Which EZ Lynk Auto Agent 3 Listing Fits Your Truck?

The Ez Lynk Auto Agent 3 for Dodge Ram 6.7L Cummins 2007.5-2021 fits the Cummins 6.7L. It fits 2500, 3500, 4500, and 5500 models, though Cab & Chassis trucks won't include Shift on the Fly.^[1] The Ez Lynk Auto Agent 3 for Ford Powerstroke 2008-2022 fits the 2008–2010 6.4L and the 2011–2022 6.7L Powerstroke. The Ez Lynk Auto Agent 3 for GM/Chevy Duramax 2011-2016 fits the 6.6L LML Duramax.

Three trucks, three versions, one right answer for yours. Find your row in the table, then read the notes for your engine underneath it, because the details that trip guys up live down there.

Truck not in any of those rows? Stop right there and talk to us before you spend a dime. A tuner built around somebody else's engine is just an expensive paperweight.

Ram 6.7 Cummins, 2007.5 to 2021

Ram owners, this one's short. If your Ram carries the 6.7 Cummins and rolled off the line anywhere from 2007.5 through 2021, the Ez Lynk Auto Agent 3 for Dodge Ram 6.7L Cummins 2007.5-2021 is your version. Check your chassis against the list in the answer above, and if it's a Cab & Chassis, read the note at the end of this section before you go any further.

Ford 6.4L and 6.7L Powerstroke, 2008 to 2022

The Ford version covers two engines, not one. It covers the 2008–2010 6.4L and the 2011–2022 6.7L Powerstroke, fitting F250, F350, F450, and F550 including Cab and Chassis, though Cab and Chassis trucks don't get shift on the fly.^[2]

Pop the hood and confirm which engine you've got before anything else. Keep that year split handy, too, because it comes right back when we get to power levels.

GM/Chevy 6.6L LML Duramax, 2011 to 2016

Duramax owners, here's your version in one line. It fits the 2011 through 2016 Sierra and Silverado 6.6L LML Duramax in 2500, 3500, and 4500 models, though Cab & Chassis trucks won't include Shift on the Fly.^[3]

Check your engine code before anything else. Get that right and you'll never second-guess this one.

Cab and Chassis trucks

Running a Cab & Chassis build? Go back and reread the second half of your truck's fitment sentence above. It matters more to you than to anybody else reading this page, and it's the one detail worth confirming before anything ships.

We'd rather spend a few minutes on the phone with you now than have you find out with the truck half apart. A good build starts with the boring questions.

What Comes in the Box With the Auto Agent 3?

The kit includes the Ez Lynk Auto Agent 3.0 with all required cables and accessories, delete tunes customized to your truck, the Lifetime Support Pack with Multi-Tune and Shift on the Fly, the switch for shifting power levels, transmission tuning on 68RFE models, and step-by-step instructions emailed to you.^[1]

"Lifetime" here means the tunes stay on the customer's profile for life; that's tune retention, not a support entitlement. Support itself comes through the EZ Lynk app, regardless of tier.

Ram 6.7 Cummins owners, that first box is yours. Ford owners, this one is yours. Everything you need is in the box: the Auto Agent 3.0 with all required cables and accessories, delete tunes customized to your truck, the Lifetime Support Pack with multi-tune and shift on the fly, the switch for changing levels, transmission tuning, and step-by-step instructions emailed to you.^[2]

Duramax owners, here's yours. The kit includes the Ez Lynk Auto Agent 3.0 with all required cables and accessories, delete tunes customized to your truck, the Lifetime Support Pack with Multi-Tune and Shift on the Fly, the switch for shifting power levels, an optional TCM tuning add-on, and step-by-step instructions emailed to you.^[3]

Put the three side by side and the pattern jumps out fast.

The device, cables and custom tunes

Here's the thing — the device is the delivery truck, and the tune files are the cargo. The cables get it plugged in, but the custom tunes are what actually change how your truck runs. Treat that little box like the key to the shop, not a gadget that rattles around the glovebox.

Give it a home in the truck where it won't walk off. Same goes for the instructions that land in your inbox: read them once before install day, not halfway through it.

Multi-Tune, Shift on the Fly and the switch

This is where the tuner gets fun. Think of the switch as a gear selector for power: one truck, several personalities, picked by hand.

Want to know which tune file belongs with that switch? We cover it in the app section, because that's where the choice actually gets made. And if your truck is a Cab & Chassis, go back to the fitment notes before you count on this feature.

Where transmission tuning differs

Look at the transmission row in the table above, because it's the only row that doesn't read the same all the way across. Find your truck's column and read that one cell twice. On a build that sees hard launches all weekend, you want to know exactly what's covered before the truck ever comes off the trailer.

How Much Power Does Each Auto Agent 3 Tune Add?

Start with the Ram 6.7 Cummins. The custom tunes carry five power levels: Stock, +40HP, +80HP, +120HP, and +160HP.^[1] Now the Ford Powerstroke. Power levels run by year.^[2] The 2008–2010 6.4L gets Stock, +60HP, +120HP, +180HP, and +240HP.^[2] The 2011–2019 6.7L gets Stock, +50HP, +100HP, +150HP, and +200HP.^[2] The 2020–2022 6.7L gets Stock, +40HP, +80HP, +120HP, and +165HP.^[2]

Duramax owners, your ladder is just as easy to read. The five power levels are Stock, +50HP, +100HP, +150HP, and +200HP.^[3]

Read every number as an add-on over Stock, not a total. That's what the plus sign is telling you, and it's the difference between a sane expectation and a disappointing dyno sheet.

Ram 6.7 Cummins levels

Five steps on one switch is a lot of range. On a sled-pull truck, the top step is the one everybody wants to talk about in the pits.

Here's the thing — the top of the ladder only makes sense once the rest of the truck is built to take it. So a fresh build usually starts lower and climbs as the parts catch up. Want the honest version? Plenty of builds live happily in the middle of the ladder, where the truck pulls hard and the rest of the drivetrain isn't being asked for miracles.

Ford levels by engine and year

Ford owners, this is where the year split from the fitment section pays off. Find your engine, find your year, and read across one row.

Don't borrow numbers from the row next to yours. Two trucks can look like twins parked side by side in the pits and still sit on different rows of that table.

LML Duramax levels

Five steps, one switch, one rule: start where the rest of your build can handle it, then climb. Sound familiar? Good.

A beast of a tune on a build that isn't ready for it is like stacking more weight on the sled before you've checked the hitch. Climb when the truck tells you it's ready.

How Do You Run the Auto Agent 3 From Your Phone?

There's no screen on the device, so you run everything from any Apple or Android phone through the Auto Agent 3 app, including live metric monitoring and reading or clearing DTC codes.^[1] Go to the App Store or the Google Play Store and download the EZ-Lynk Auto Agent App. The EZ Lynk only needs to be plugged in while you install your tunes or make changes.

Think of your phone as the dash display you never had to cut a hole for. The good news? You already know how to work it.

Getting the app on your phone

A few minutes at the kitchen table beats fumbling with it in the cab. Once it's downloaded, open the app and make your account. Open your Wifi settings and connect to the Auto Agent via Wifi on your phone or tablet.

Some phones give a "No Internet" message, and that's normal. Once you're connected, open up the app and the Auto Agent should detect your VIN number and recognize the connection.

Codes and live data

You can keep it plugged in if you want to use its gauge features. The EZ Lynk also reads and clears DTC codes and gives you real-time diagnostics on whatever data you want to watch.^[2] On the dyno or between passes, that's your early warning when something starts trending the wrong way.

Ram 6.7 Cummins owners, your version carries one more thing worth knowing. You can revert to factory settings if you ever need to.^[1]

Picking the right tune file

Slow down here, because this is where a rushed flash goes sideways. Ram and Ford owners, run this step from your own truck's instructions, not this walk-through. Duramax owners, the walk-through below is yours.

In the app, ECU Profiles is where your delete tunes are stored. There's a cloud button to the right of the file name that pulls the tune from the cloud and saves it to your phone.

Now mind the switch. The tune that has "SOTF" is the Shift on the Fly tune, and it should only be used if you install the DSP5/CSP4/CSP5 switch. Once the file is downloaded, press INSTALL and the EZ-Lynk will guide you through the flash process.

What Should You Expect During Installation?

Install the delete tune before installing your exhaust and EGR delete parts. Hook up a battery charger and set it to 10A. The Auto Agent 3.0 plugs into your OBD-II port under the steering wheel, then your custom VIN-specific tunes download from the cloud and install to the ECM.^[1]

It's a simple plug and play tune install.^[1] Simple isn't the same as skippable, though, and the sequence you work in is what separates a smooth afternoon from a truck stuck in the garage.

Before you plug anything in

Tune your truck before you remove the hard parts. That way, if you have any trouble tuning your truck, you're not dead in the water with a broken truck until Monday morning when we open back up.

Hook up a battery charger even if your batteries are brand new and fully charged. The new ECMs are very sensitive to voltage, and the flash can fail if the voltage drops too low. Think of the charger as your spotter on a heavy lift: you hope you never need it, and you never skip it.

Clear the afternoon, charge your phone, and park the truck somewhere it can sit undisturbed. Rushing is how a simple job turns into a long one.

Flashing the tune

Duramax owners, your part of this starts before the box even shows up. After purchase you'll get a vehicle info form to fill out with your VIN, then we ship the EZ Lynk loaded with your tunes.^[3]

From there, the flash itself is the easy part once the phone is linked. Pick the file, hit INSTALL, and stay with the truck instead of wandering off to start on the exhaust. Once the tune is done, it will say "Installed" or "UNINSTALL" under the tune file.

Extra steps on 2018+ Ram trucks

The bypass cable is only required on the 2018+ Cummins models. Ram Cummins owners, read this next part closely. If you have the 2018+ model, this step is mandatory, otherwise your EZ Lynk will not install.

The most common issue with the EZ Lynk installation is the bypass cable: if it's not connected correctly, the tunes will not take and the device will show "no vehicle shown". Seat that connection like you mean it, then check it twice.

One more Ram job, and this one isn't limited to the newer trucks. On each year model, you will be required to unplug the Air Intake Throttle valve. Leave it plugged in and it may stick closed, and the truck won't run right or rev up.

The intake air throttle valve is located on the driver side of the motor underneath the intake by the intercooler pipe. Keep it unplugged indefinitely; don't plug it back in.

After the tune is on

Ram 6.7 Cummins owners, read this one twice. You must physically remove the DPF, since leaving it in while the tune runs will clog it, and EGR delete is optional but highly recommended.^[1]

If your truck gets TCM tuning as well, two quirks are worth knowing before you panic. You cannot overwrite an Engine Tune with a TCM Tune, and vice versa. If you install TCM tuning, only one will show as installed even though both have been flashed.

What Does the EZ Lynk Auto Agent 3 Cost?

The Ez Lynk Auto Agent 3 for Dodge Ram 6.7L Cummins 2007.5-2021 is listed at $1,824.00. The Ez Lynk Auto Agent 3 for Ford Powerstroke 2008-2022 is listed from $1,924.00 to $2,570.00. The Ez Lynk Auto Agent 3 for GM/Chevy Duramax 2011-2016 is listed from $1,864.00 to $1,939.00.

Price by listing

Notice that two of those are ranges, not single numbers. Rather than guess at what moves a price inside its range, confirm the exact figure for your truck on its product page before you check out.

Here's the part guys skip. The cheapest number on this page is only a bargain if it's the version built for your engine.

What the price includes

This is the bang-for-your-buck part: the price on each version is for the whole kit in the box section above, not the device on its own. Line it up against your truck's column in the contents table and you'll see exactly what the number buys.

Which Auto Agent 3 Should You Order?

Match the listing to your engine and model year. A 2007.5-2021 Ram 6.7 Cummins takes the Ram listing. On 68RFE trucks, the transmission tuning raises line pressure on every shift to protect the clutch packs.^[1] A 2008-2022 6.4L or 6.7L Powerstroke takes the Ford listing. A 2011-2016 LML Duramax takes the Duramax listing.

Still on the fence about which row is yours, or whether your truck counts as a Cab & Chassis? Call us at (888) 830-2588 before you commit, and we'll sort it out with you.

If you drive a Ram 6.7 Cummins

Our take: pick your level by the build, not by the biggest number on the switch. We'd keep a truck on mostly stock supporting parts in the lower half of the ladder and save the top steps for the build that's already been beefed up to take them.

Running a 68RFE? That line-pressure bump is exactly what you want behind an engine that's about to make more power.

If you drive a Ford Powerstroke

Your model year picks your ladder before you ever touch the switch. The 6.4L owners and the 6.7L owners are reading different rows of the same table, so make sure you're on yours.

Running the 6.4L? Take a hard look at the top of your row before you flip to it, and make sure the rest of the build is ready for what that step asks. Climb when the build is ready, not before.

If you drive an LML Duramax

Decide on the TCM add-on before the box ships, not after the truck is already apart. Not sure whether it makes sense for your build? That's exactly the kind of question worth a quick call.

Then flash, check that the tune shows as installed, and enjoy a workhorse that finally pulls like it means it.