Duramax Diesels Forum Truck of the Week
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Old 09-13-2017, 08:41 PM
Kschu62 Kschu62 is offline
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Default Buying my first duramax. Few questions.

Hello
My company is retiring 2 2013 gmc duramaxs. They're single cab long bed, single wheel 3500, z71s. They both have 100,000 miles and they're asking 20k. I'm the first person to try and buy one of the 2. I'm just wondering what I need to know about these years? What are the common things to go wrong? What should I do to it if I buy it? Don't have big plans for it. Probably just a level and a proper tune. I want this truck to last. Any info helps.

Thanks
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Old 09-13-2017, 09:34 PM
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2004LB7 2004LB7 is offline
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The LMLs are a pretty good truck/engine. There isn't a whole lot of issues with them. There is the CP4 high pressure fuel pump that can implode and take out much of the fuel system and injectors with it. Its rare but can happen

Lile any modern diesel, the egr can put too much soot into the intake clogging it up. Your tuner (if you go efilive) can likely make some changes to help with that

Dont go too wild with the tuning without addressing the transmission. Maybe 100 HP over stock max but will still shorten its life. 50 or 60 hp and you will probably never have any issues

I am sure there is more that others will comment on
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Old 09-13-2017, 09:35 PM
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PS, welcome aboard
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2008 Chevrolet 3500HD DRW LTZ
285/75/17 Nitto Dura Grapplers, 4.56 gears, Front and rear ARB lockers, Efi Live tuning by me, Raptor 160 LP, Cognito 4-6 NTB Lift, 4" Exhaust, Built Trans by Mike L.
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Old 09-14-2017, 04:06 AM
Kschu62 Kschu62 is offline
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Ya I'm not really planning on tuning it to make crazy power. Just to get it performing like it should. These trucks were also super taken care of and have a long list of service records since new. Hopefully that helps that fuel pump issue. Also, anything I should know about straight piping? I know some other diesels require I good bit but I'm not very familiar with the emissions on these trucks.
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Old 09-14-2017, 04:58 AM
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dk2429 dk2429 is offline
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Well I'm not much help, because I literally got my first Duramax yesterday.. lol. But you'll love that thing. These trucks are beast. Mine is an '06 with 178k miles.. this is just my personal opinion as of now...: There's no need at all to tune or add any power to these trucks. They already yank your head off you neck..

Last edited by dk2429; 09-14-2017 at 08:08 AM.
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Old 09-14-2017, 05:18 AM
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Do NOT level it unless you want a terrible ride and to rebuild your front end way too often.
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2002 Chevy EC/SB LT 4x4. S&B intake. 5" Magnaflow SP. LML manifold. PPE stage 5 tranny. 30% over Bosch injectors. LBZ SuperSport pump. Studs. All powder coated. EFI by Ridge Runner. Twin Kennedy pumps & pickup. Glowshift gauges. Edge insight cts. Trimmed and lowered on Gear 22x12s and 305/40 Proxes ST

Other toys:
"Tank" 1982 K10 6.2 Detroit diesel/sm465/np205 with 4 inches of lift and 35s. Slow and indestructible
2011 Yamaha YFZ450X
1992 Yamaha Waverunner 3
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Old 09-14-2017, 05:39 AM
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Great deal! Welcome
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Old 09-14-2017, 05:47 AM
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DAVe3283 DAVe3283 is offline
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If you want a better stance on the truck, I would recommend lowering the rear a couple inches rather than raising the front. Like zakkb787 said, you'll wear out front end parts if you crank it up.

For the tune, there is no need to remove emissions gear anymore. Tuners like Adrenaline Truck Performance can add enough power to nuke your transmission while remaining emissions compliant. There are some tuners who can/will do deletes, but it doesn't provide the mileage and power benefits that it did on the pre-2011 truck's, so many tuners won't even do deletes on the LML.

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Old 09-14-2017, 05:53 AM
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Quote:
Originally Posted by DAVe3283 View Post
If you want a better stance on the truck, I would recommend lowering the rear a couple inches rather than raising the front. Like zakkb787 said, you'll wear out front end parts if you crank it up.

For the tune, there is no need to remove emissions gear anymore. Tuners like Adrenaline Truck Performance can add enough power to nuke your transmission while remaining emissions compliant. There are some tuners who can/will do deletes, but it doesn't provide the mileage and power benefits that it did on the pre-2011 truck's, so many tuners won't even do deletes on the LML.

Sent from my S60 using Tapatalk
Lowered trucks are cool
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2002 Chevy EC/SB LT 4x4. S&B intake. 5" Magnaflow SP. LML manifold. PPE stage 5 tranny. 30% over Bosch injectors. LBZ SuperSport pump. Studs. All powder coated. EFI by Ridge Runner. Twin Kennedy pumps & pickup. Glowshift gauges. Edge insight cts. Trimmed and lowered on Gear 22x12s and 305/40 Proxes ST

Other toys:
"Tank" 1982 K10 6.2 Detroit diesel/sm465/np205 with 4 inches of lift and 35s. Slow and indestructible
2011 Yamaha YFZ450X
1992 Yamaha Waverunner 3
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