Top Modifications For The LLY Duramax

Top 5 upgrades for the LLY Duramax! As a guy that drives an LLY Duramax daily, we figured Anthony would be the best one to break down what the top 5 upgrades for the 2004.5-2005 6.6L are. He gives you a few products that will help turn your LLY into a beast with daily driving, towing, and overall just a whole better ride.

Check out the products here below 👇

1. LLY SPADE TUNING:

2: S&B LLY Intake Elbow:

3. Fuel Pressure Relief Valve:

4. FASS Lift Pump:

5. ???? (Get some great tuning by clicking the link that is for the LLY SPADE Tuning 😉

[kevincadden]

I have a '05 GMC Sierra 2500HD LLY with 50, 000 miles on it. Ordered and owned it since day one. Use nothing but Amsoil premium diesel synthetic oil and lubricants the best of the best. Have the Fass Titanium 165 gph lift pump and S&B intake manifold. Felt a big difference when I put the S&B on. Gonna have to get the tuner. Also have the Mag-Tech trans. pan and differential cover. K&N Air filter. Transmission/Transfer Case strengthener bracket made by Merchant Automotive Duramax Specialists. Thanks for all of the informative videos you all put out!

[jdaniel]

Careful with the PPE race plug everyone. It increases the chance of a high pressure line from the fuel rail to blow. After doing the race plug on my truck i blew 3 different lines on 3 separate occasions having to be towed.

[lobuk]

I had over 300k on mine with these mods. Truck towed GREAT!!!

[SiLLYrado]

Thanks for all the help past and present.

[goats]

Stoked to see new content on the LLY. Like Kevin below I bought my 2005 3500 new, 40, 000 miles on the clock. Added the S&B around 2009, not sure as I work overseas and don't remember exact dates. I haven't mounted the FASS 150 I purchased back in the day(NIB), same with the Banks Technicooler and new trans cooler. So many plans from back in the day, time goes so fast. Banks CAI, Six Gun, full exhaust and their speed brake. What I'm concerned most with is the trans limping if I'm above level 3 at sea level. Along with wanting to beef up the trans I'd like to add you 5-6 speed kit. Retiring in 18-24 months, guess I better make the move while income is available. Head studs...

[PurpleMrMojo]

Thank you for the great information Duramax tuner. One of the most difficult bits of information to find on the Internet for my Duramax are the differences between a regular pick up and the C5500 Topkick trucks out there. I really want to get a y-bridge kit, but the intercooler piping is completely different. It would be very very interesting to find out all the other differences. One of the best things is the rear access of the engine from inside the cab. How convenient for so many different modifications, and great access to the turbo and exhaust up pipes. Also easy easy access to the rear of the fuel rail. Tons of space all the way around the in general.

I have already put a PPE tune, eliminated the catalytic converter, EGR block off plate, PPE, fuel rail plug, and the turbo inlet elbow. I’m more than happy to bring mine over to your shop if you’d like to do an exposé on top kicks ! It only has 50, 000 miles on it and it’s clean as it could possibly be. 2004.5 LLY

[maryhoffman]

New mouth piece on this fall. Not an, omg that's fast. But definitely little more response on throttle and running cooler. Want to get fass pump next. Inherited 4.5, never getting rid of her. Bone stock, having a blast learning about her.

[bradyfeinauer]

Would love to see a similar video for the LML

[travisguy]

My trucks throwing a p0335 code won’t start gonna check the wheel to see if it’s loose. Throw a bunch of codes now only that code gonna change the sensor and check the wheel anything else you would check

[dangosh]

My work truck is the 06 lly/lbz. If driving respectable (not driving it hard at all) aiming for fuel economy does the race tune get as good, better, or worse economy as the street tune?

[ColtenShackelford-cpbc]

If my truck is already tuned. Can I wipe it a retune it with your tune? I have EFI live single tune that the previous owner had already done. No idea what it's tuned for. Would love to retune and add the dsp5. 04.5 lly

[Theopeiduhxhhxhhxhxxhx]

Where can I I buy a 4 inch turbo back mbrp straight pipe for Lly Duramax?

[fatman]

#1 mod, move the hell out of the rust belt

[dudeman]

Explain my 757, 000 mile cp3 with no lift pump...

[DanielBarker]

Duramaxtuner :As far as the tuner, what if you arent sure what modifications have been done?

[elfbar]

My 05 lly is reading 2psi at idle on the bully dog what should I do I need help

[jacksoncaldwell]

Dose it actually not work with deleted egr?

[flstringer]

Hilarious that you need a disclaimer for sticker horsepower, lol... It had a typo (missing a 1), though, everybody knows it's actually +10 hp per sticker..

[damianmathis]

Just put in a lift pump that will solve most of the low fuel rail pressure

[hunterharness]

Hey duramax tuner
What would you say is healthy fuel pressure for an 04.5 lly at idle

Idle my truck runs between 3-5 psi