What to look for when buying a Used Duramax *wish I knew this sooner*

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What to look for when buying a Used Duramax must watch
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Truck Master
P.O. Box 525
Perry, MI 48872
Channels to check out:
Rustbelt Mechanic (bed lined paint job)
/ channel
JW Montoya
/ @jwmontoya
Bertrand850
/ bigstallion80
Duramax_diesel
/ @resurrecteddiesel
Mods done to the Truck!
EFI Live DSP5 Switch Idaho Rob
K&N Cold Air Intake
Billet Turbo Wheel upgrade
WCFAB YBridge
FASS Titanium 150GPH Lift Pump
FASS Fuel Sump Kit
MBRP 3inch Turbo Down pipe
Cat/muffler delete
Onboard Oil Filtration System
PPE Race fuel valve
Ported fuel fitting
Transgo Jr Shift Kit
Resonator Delete
Egr Delete
Egr Cooler delete
Sinister Cat Fuel Adapter
Sinister 4 inch Exhaust with AR15 Tip
PVC Reroute
PPE Stage 5 Built Transmission
Zone off-road upper control arms
PPE Stage 3 HD Tie Rods
6" Pro-comp suspension lift kit
5100 Bilstien Shocks
35/12.50/R20's
20x12 Vision Prowlers -51 offset
Music by: suncloud

[@Gillblaze]

Rare to find an owner who will point out the bad stuff on their vehicles. Says a lot about the owner, he seems pretty honest.

[@der_pinguin44]

Every time I've sold a car, I would list off every idiosyncrasy of that car, then list all the bad, the mediocre, then the good. Good news last always eases their minds.

[@Polishkid88]

i thought you died in the first Terminator movie!!! @@der_pinguin44

[@der_pinguin44]

@@Polishkid88 I haven't gone back yet.

[@Polishkid88]

oh ok @@der_pinguin44

[@TheRealZJE313]

Any diesel engine that Banks performance talks about is a good diesel engine

[@flex93312]

I did exactly what you recommended and I passed on a 2008 Duramax after checking the water hose and looking for blow by and the exhaust. It was blowing white smoke from the oil cap and the water hose was hard to squeeze also. I looked for a small whole on the water reservoir tank and couldn’t find one. I looked at the tail pipe and it smelled like sulfur and had white smoke coming out of it. I then checked it with a scanner and it had a bunch of codes, specifically, it had all eight cylinders showing restrictions. When I told the used car owner that I was going to pass on the truck, he tried to talk me into it and say nothing was wrong with it. If I hadn’t looked at your video’s before I looked at it, I might have bought it and regretted it. Thanks a lot for the video, you saved me a lot of money and head aches.

[@Randomlevel6]

The good old days, when a 76K mile LBZ wasn't $39,900.

[@randrrcscorbin-tyler3998]

I’m about to buy a lml 3500 for 32k 137k miles

[@randrrcscorbin-tyler3998]

I’m about to buy a lml 3500 for 32k 137k miles

[@rrlandservice9017]

Then the market crashes and they go for 15k lol

[@VincentoftheRolleri]

@@randrrcscorbin-tyler3998 Picking up a LBZ with 40k for 28,000 tomorrow. So excited.

[@trailerwithyardwasteonit7188]

@@VincentoftheRolleri most likely they tampered the odo, no lbz with that much miles will ever go for anything under 35k. I’ve seen that plenty of times. A buddy of mine got a smoking deal like that and turned out it was indeed to good to be true

[@GM-ft9ec]

Don’t buy a 20k truck in the North. If your spending that kind of money, buy a one way plane ticket to Texas and get a truck with no rust. IMHO It’s what I do.

[@netprowlerp]

Amen Brother. Those northern trucks are soooooooo rusted out.

[@davewilson2559]

I guess you forgot about the crazy flooding that's happened in Houston and other parts of Texas over the last few years. Fuck Texas, I'll got to Arizona or New Mexico.

[@christians1193]

With exception to Idaho/Montana/Washington and Oregon. Salt is rarely used up here iv purchased dozens of vehicles up here with little to no rust. But a good rule of thumb is to buy in the south vehicle tend to be cheaper in cali and Texas anyway.

[@brbroberts1]

@@davewilson2559 A single flood might screw up the electronics, but it won't make the frame rust like that.

[@C7555]

But with that being said be prepared to pay extra southern trucks typically cost more cause of popularity

[@sogbryan6633]

FYI:: They are right and wrong about the smoke! White means your burning coolant (bad headgasket). Blue haze means your burning oil (bad rings). Black means your burning access fuel (bad injectors). The darker it is the worse it is. Hope that help someone with their diagnoses.

[@rightytighty3031]

Guys, I really appreciate the points you've made available to the diesel novice like myself. Great job! Thanks again..

[@themjf2000]

Honest dealer. Thanks guys for the information to us guys out here. I’m a fleet mechanic got my experience on duramax since the whole fleet are the 6.6L. I’m thinking of getting one for myself, feels good to see that there are honest dealers out there.

[@brianlundsr1489]

I know nothing about Duramax...much less any diesel truck. I would like to find something within my "old man, retired, and poor" budget to pull my 5th wheel with. I currently have a 6.0 GMC that will do the job on the flats but when into any hills, she will grunt. (the Alison trans is a good option too) I definitely need to watch more of your videos to understand what LGBTQ, LLY, BMT, XYZ, and all the other Duramax acronyms mean.

[@thecarl213]

I just have to say. The breakdown of this video is by far one of best what to look for videos I’ve ever seen. Thank you and well done. Great detail.

[@andyruh1776]

It's great to see another vet vlogging about diesel trucks. You got another subscriber man. Love your videos.

[@TruckMaster]

+Boosted Burban thanks!

[@jeepmor]

Great tutorial for inspecting a diesel. Good explanations and thanks for showing your audience how you actually do it.

[@michaelprue9024]

I realize this is an older video, 4 years at this point, but A LOT of great information. I just recently purchased a 2019 2500 HD L5P crew cab, and man do I love this vehicle. It is GM Certified less than 75k miles. I work on the big rigs for Kenworth, but have never personally owned a Diesel engine myself, especially not a Duramax, until now. And man, after watching a few of your videos, I’ve learned 1 thing - I’ve got A LOT to learn lol. I appreciate you, your honesty, and the time you’ve spent making these videos. Thanks bud.

[@44santaniello16]

Collapsed upper radiator hose most of the time is a coolant tank cap getting gummed up with crusty dexcool. Soak it in hot soapy water for a while and rinse with hot water then blow it off with some compressed air. Happend to me in my LLY and LB7 this fixed the problem. Definitely could be other problems also stated in the video but always start with the easy stuff first👍🏼

[@ronthompson2366]

Well done simple things that are often over looked in the excitement of buying... keep up the good work.

[@TruckMaster]

Thanks

[@halflife1155]

Very informative, I subscribed and am saving the video. Thank you for being honest and putting truth out there.

[@kfstreich4787]

I'm not sure if you go over it later in the video but look into the duramax injector cleaning procedure with gm upper end and injector cleaner, this is the system where you disconnect the fuel system and idle off a fuel jug with cleaner and half a gallon of diesel, I did this on my lbz and it improved idle as well as eliminated black smoke at idle and full throttle.

[@robertgonzalez8419]

I love the raw knowledge setting people in the right path to know what to look for awesome keep up the great job God bless

[@ericrought8378]

Definitely appreciate the info as I now own a Duramax LML. Your videos are informative and I learned a good deal. Thanks

[@jdew00]

was looking for an lbz when i found this video, very helpful and i finally found the truck i was wanting. thanks

[@diaperwhip]

I'm in the market for a duramax just sold my 2000 F250 I loved that truck but I'm ready for a new build. Thanks for the tips man you earned a sub!

[@TheMontoya09]

Careful for blown headgaskets on the 2010-2014’s I put 80k on the 11 and about 60k on the 13. Both had blown headgaskets under 100 k

[@thatoneguy985]

I've learned a lot from your channel. I'm a Ford guy and I've been looking at duramax a lot lately. I'm pretty split on either an LBZ or LMM

[@josephmockbee]

Keep’em coming and make a series TruckMaster. Not in the market, but I do have a 2015 LML with 150k and it’s nice to have an idea what to check on periodically going forward. Thank you sir for the content.

[@dennisa6492]

Thanks. Buying my first RAM 2500 diesel. I learned some things to look for. Good luck in your business.

[@tzgtaggressorpro3143]

Awesome video! Really glad i seen this before buying a LB7 or LLY. Very informative!

[@doninetexas]

I'm checking out a vehicle tomorrow so this video is perfect timing for me. Thanks

[@jonsmith919]

Also check the hours by pressing odometer button instead of the miles. A lot of these idle in the oil field all day 24/7.

[@michaellevenduski7263]

Great video on Alex. Honest and trustworthy. Id buy a truck from him Any day. Im in market for a diesel. But have to get it shipped. See how that goes.

[@bongdong69]

Great video guys. About to buy an LLY, this is exactly what I was looking for👍

[@AZO2023]

Hi , have been looking to buy a duramax next years and watch your video start helping me understand way better how the engin work and what to look for when buying used .Will continu to watch cause I want to learn hoe to repair myself my futur duramax looking for 2006 to 2009 thankx body hi fallow you from Quebec 🤘🤘👌

[@edgarmonzon1188]

Great tip on the head gasket check. I work a bit on cars and not one person knows everything so lil tips like that r helpful

[@Rplush8]

Good information ! Man if I was in need of a diesel truck or vehicle I would be looking for this guys car lot !

[@mrymkos]

Man I’m looking at buying an LLY this weekend. This video helped so much! Keep em coming man!

[@TruckMaster]

+Michael Rymkos good luck!

[@dakotapeek6904]

Same here

[@MrJav1986]

Go buy a Cummins

[@dub07odgecharger]

LLY is without the emission?

[@nicholasprocknow9885]

My dad almost bought an lb7 Sierra it was a good condition all around truck but she blew so much blue smoke so we ended up buying an lly keep up the good work

[@richfarfugnuven6308]

Great info on this. I am in the market for a 2006 duramax one ton dually. Thanks for doing this.

[@aarondavis1096]

Great information thanks. Would love to see more videos.

[@nitetrain7136]

Cool video for the sales guy to be pointing out his truck flaws and telling people what to look for. I should call him as im new to wanting a diesel and would have alot of questions.

[@darinbarfield8738]

My 2007 GMC 2500HD CrewCab with 6.6L Duramax looks brand new underneath compared to all these trucks. The body has a few minor scratches & dings as it was my company work truck for about 10 years, now it’s basically only used on weekends to pull horse trailer, Only has 185,000 miles Still going strong!

[@ToXSicK1340]

GREAT POINTERS!!!! Thanks for the Awesome Content.

[@TruckMaster]

+Phil G. Thanks

[@nathanwilson6670]

Look under the cap. If you push hard enough, you'll understand that the cap holds the pressure relief valve. That feeds that hose right next to the cap. I guess you could find pressure lower than the limit imposed by the pressure relief valve on the coolant reservoir cap.

[@MATTYANDSMOKE]

Good job lads. GR8 video. Stellar information. Much appreciated.

[@prestonia24]

This was a great video, lots of good information. I love my 06 LBZ and would be hard for me to part with it, she's only got 67k miles on her. Since we don't have snow here in Los Angeles, the only chance my truck has to get rusted is when I drive up to the mountains to go skiing or on road trips.

[@saltysteel3996]

Just got an 07 LBZ. Verified VIN engine code. It's a crew cab with a long bed. All stock minus CAT. 240K miles. Checks out fine, just a few interior discrepancies I'll have to fix. Got it for 10K with a trade in. Edit: Live in Bama and bought in Bama. No rust.

[@ivanrojas8568]

I gotta admit you have great videos keep up the great work!!

[@paulahansen5089]

Going to look at a 2002 Silverado with 6.6L Duramax today. This is very helpful!

[@michaelspooner3503]

Great helps, and like honesty of the dealer in perry.

[@edjo3430]

Finally, informative, simple tips. Thank you

[@chrissmith8769]

Damn I’m going to look an lly today and this video was in my recommended. This was a big help

[@rickwood248]

Great, looking forward to see more content like this, very very helpful

[@crepitus3552]

Great vid on tips to look for, thanks! subbed!

[@jacoe33333]

Very informative. Thank you. Great video. You can’t trust anybody.

[@dmartin8196]

I bought a truck from Perry Auto sales, great guys up front and honest. Love my new truck!

[@TruckMaster]

+David Martin that’s awesome

[@TravisBuch]

Hey grape will you do a pc spec vid or list?

[@joeloring7092]

What state? Perry?

[@wweboogeyslam437]

Thanks so much guys, this will defiantly help me out when I buy my duramax

[@burtbrooks7731]

Man sure is nice to see there are honest truck dealers out there👊 those dirtymax’s are by far the best engine trans and truck combo out there my opinion👍 I’ve owned a brand new 01 ordered from factory 3500 lt dually and I put 450,000 on it and sold it to guy for farm truck it’s still going almost 700,000 now 👍👍 I just bought my first defdpf diesel gmc lml with 100,000 on it and it’s like brand new I used all ur guys info on checkin out a used duramax and it helped me a bunch so thank ya guys👊keep up the vids

[@TruckMaster]

Thanks and good luck

[@Erated78]

Great video, very helpful tips. I'm happily subbed after being sent here from Whistlin Diesels. Cheers

[@dillonwadley44]

The weep hole is intended to allow extra lubricant from the pump bearings to drip out of the water pump housing. Without this hole, the oil would be forced past the water pump seal and get into the engine coolant.

[@white24valve]

If upper hose is collapsed..buy a new surge tank cap..or take that one and run hot water on side where the spring is inside

[@r.mcconnelljr9548]

Awesome vid and thank you! Now I know what to look for on the lbz im eyeballing

[@ffrob2001]

This video was great, Thank you very much. Please post more like this

[@THX--nn5bu]

I am an owner of a LLY Chevy 2500 HD 2005 Silverado Duramax, almost like what you own and last but not least, Thank you my fellow comrade for your service, Corporal E-4, 2nd platoon, Bravo Battery, 3/5 Air defense Artillery Regiment, 2nd Battalion, Third armored Division, US Army Germany. 1985-1990...."HUUAAH!!

[@kfstreich4787]

One more thought, the transfer cases on some trucks have a pump rub issue, this will shut you down in a hurry! If it leaks, or you get a strange oil splatter on your tailgate take preemptive action before the internals self destruct!

[@mylink2u7]

Merchant Automotive up there with you in MI sells the pump rub kit. I did mine as a preventative. Search it in forums and on you tube

[@trevorhall2832]

Nice video. Good pace. Very helpful.

[@projekt679]

I just subscribed. Great rundown on what to look for. I’m in the market and will bring the truck to a mechanic as well.

[@eddiereichel9354]

I do instrument cluster rebuilds even when they are completely dead. I also can do mileage adjustments for trucks with replacement instrument clusters.

[@ephedrineshipped2u396]

Ain't that illegal?

[@Gasolinegarage]

Love Watching your videos I’ve been a Chevy man my whole life never had a Duramax I’ve always stuck with the gas jobs I got a 6.0 and love it .. maybe a diesel be in my future but it seems like a lot of keep ..

[@sethh8365]

Dan Makin On my gas trucks in the past I would always change my oil every 3/4K miles. I let the Duramax go 5/6k miles (deleted) so it's about the same cost really. Everything else is the same on the air frame. It's not that much more to own a Diesel. Cheaper if you tow a lot. My uncle just converted and bought a Cummins to tow his 5th wheel, never seen a 70yr old man so damn happy, made me happy to listen to him tell me all about it hahaha

[@ephedrineshipped2u396]

@@sethh8365 you can go longer intervals with synthetic oil.

[@neemguy81]

The VIN is the indication to use on where a truck was actually made. Starts with a "1, 4 or 5", U.S.A. 2 is Canada, and 3 is Mexico.

[@sduncan4254]

Love the informative videos. Keep em coming!

[@TruckMaster]

Thanks

[@tlacael511]

This guys are great advisers. Thank you

[@Planktarded]

Thanks for making a video that's actually helpful, not some bs like every video I've watched this far about people talking about their truck and other dumb shit!

[@paulgrahampgpg3142]

Did all the tests to my 6.6 I passed them all thanks 4 the video buddy

[@aaronwipf6637]

Nice video man can u post a video of ur Duramax that u bought, would love to see it, I learned a lot from this video

[@lorenmitchell9851]

Thank you so much truck master for your service ,I served to 11b 10th Mountian and think you guys for making this vedio,wish that I knew this info a year ago,I have a 2013 Denali 2500 6.6 lml

[@_WELDR_]

I love that black truck behind the truck you guys are talking about!! That’s an AWSOME video 👍🏼 the guy wit bought the hat looks so familiar 🤔 .

[@johnhall1302]

Great video, very useful while truck shopping.

[@darylkinnett675]

Thanks for the tips , deff wish we were closer to your area.

[@joshuaperrone811]

Dude i want more videos like this it really helps

[@ejones4089]

Old Abe hanging back there by the flag gotta love it I miss 101st good vids by the way!

[@brianmaple1028]

thanks for sharing, very informative straight shooting video

[@dougknutson6522]

Nice summary of critical things to look for on the Chevy !!

[@TruckMaster]

Thanks

[@Dead-Goldstar]

Great video it helped a lot when I was looking for one I purchased a 2006 GMC Sierra SLT 2500 HD duramax 6.6 turbo LLY engine no blow-by it has 325.000km. It needs rocker panels on each side I’m getting quotes from $2000.00 to $9,500.00. HopefullyI can find a better price this summer or someone that does the rocker panels on the side.

[@marcbenedict3676]

i have a 2005 duramax 6.6l hd for almost 5 years now. I have replaced the wheel bearings ( could hear the tires wobble on the road at slow speeds) the water pump, power steering pump, injectors, brake booster, and most commonly that damned fuel filter head assembly

[@geauxtigers6369]

Great video wish all used car dealers were honest about what they are selling you

[@mjcpirate1]

Awesome video! I would like to see something similar on the emission components explaining what they are, and what was added throughput the years and how it effects the engine.

[@Mindfxr]

Great job very informative thank you!

[@pedritoc.c.t.665]

Great video man

[@kingibroo5129]

Great tips thank yall

[@jayharvey8772]

I am looking to buy a 2007 LBZ GMC 3500 Denali and the information that was shared on this video is very useful info for me

[@dustinquillin7230]

Really good informative video love your content buddy keep it rollin

[@TruckMaster]

Thanks 🙏

[@NoLove4Babylon]

Awesome advice, thanks!

[@bradh6185]

This is invaluable information, guys. Thanks!

[@georgetrotter3012]

great video, super informative.

[@b.s.adventures9421]

Thanks for showing this

[@ryan11199]

Great info. Very smart young men!

[@nomadicfenceman509]

I got a 8.1 gasser.... hoping to someday graduate up to a diesel.... the info is gold for buying used, thanks! And I subbed up on this one... seen a couple of the Allison vids.

[@TruckMaster]

Thanks for the feedback 👍

[@jasonhemann9825]

A diesel if you pull a trailer is free when compared to a 8.1. I had a 02 gmc with a 8.1. It would go 179 miles on a tank pulling a 20 foot enclosed trailer. My 03 cummins goes 440 on a tank same trailer lol

[@nmlittlebigman]

Excellent video. I picked up my first Duramax an 06 LBZ with 127,000 miles last spring. I paid $21K for it.

[@Waspus500]

Picking up an LB7 in a week, very informative video thank you!

[@stevelovesgod]

Shouldn't had bout the Lb7., they're designed flawed with the injectors, no matter how clean you keep your fuel

[@dplorbl]

Thanks Just found this; looking at a 2007 LBZ right now w/67k on the odometer Very informative

[@crazypaul3997]

You should do a series for the LMLs! That would be awesome!👍🏼

[@matthewrydl7209]

I bought an 05 GMC Sierra 3500, crewca long bed WT, 158k miles for 18k with the iffy aftermarket warranties. Truck was 14,999 beforehand. I checked as much as I could before I bought, excepted there to be a wee bit of work as it was used and came off a ranch. Ran great, drove great checked exhaust etc, as mentioned for color and all. After 4 months the injection pump completely took a crap. Luckily the iffy aftermarket warranty will cover it, but nothing else. So still looking at 5k out of pocket. It is my first personal Diesel, so not super stoked but staying positive.

[@keithgore6285]

New diesel owner this video is helpful

[@christoy8464]

Very helpful

[@southerntrucks7320]

Great points thx guys