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Duramax Third Generation: 2006-2007.5 (LBZ & LLY) Discuss the third generation (2006-2007.5 LBZ & LLY) of the 6.6L Duramax diesel engine & associated components. 2006 LLY engine discussion also belongs in this forum due to the similarities of the 2006 LBZ and the 2006 LLY. Engine related discussion ONLY.

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Old 01-17-2007, 11:58 AM   #1 (permalink)
Join Date: Jan 2007
Location: CT
Posts: 575

Duramax Reliability

Hey guys new member here. I am looking at buying a 2500HD SILVERADO LT crew cab with the 6.6 Duromax diesel and an Allison transmission. I drive quite a bit about 300 miles a week so I am wondering what your past experiences with the reliability, maintenance costs and how many miles I should expect to get from this truck. I would also like your views on the price. Dealer has the truck its's an LT with everything but leather, 8700 miles. They want 35,500 is this a fair price? Since this would be my first diesel any insight would be great. Thanks

Last edited by CtChevy427; 01-17-2007 at 02:31 PM. Reason: Picture not placed by me.
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Old 01-17-2007, 12:38 PM   #2 (permalink)
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I bought min in Feb 06 and I have 22.5K miles on it, its been to the dealer for a 5 min recall/reflash of the computer. Other than that its been perfect!

I paid 39K brand new with every option on it. Leather, Moonroof, Onstar/Sat Radio, etc, etc.

You can check it out here.


2006 LBZ 2500HD Silverado EC 4WD - Stock and Reliable 55K Miles (4/08)
Michelin LTX M/S 245s, Line-X, Access Cover
GM TNR Nav, Sirius Module, Ipod Adapter
Fisher 8' SS X-Blade w/Timbrens & 770lbs in the Bed
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Old 01-17-2007, 01:05 PM   #3 (permalink)
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I would call $35,500 a bit high. Great trucks though.
'04 CC/SB Built LLY, Built Trans

Originally Posted by Cowracer
I guess I can go put kerosene in my supersoaker and sue them when I burn my house down.
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Old 01-17-2007, 01:54 PM   #4 (permalink)
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What year & motor? I bought mine Aug 30 2006 and drive about 400 miles a week,(Most highway)And have about 12,500 on it now, It is a Great to drive,(Better then that Dog Ford I owned) It has Great power and comfort, as for maintenance just Oil ($70 @ local garage)and fuel filter changes($40 @ same place), No Big deal, Get It you will be happy you did!
06" 2500 Sierra CC, 4x4, 6.6 Diesel,Loaded, Banks Ram air and Monster dual exhaust, Pioneer AVIC Z1 ,20 inch Jesse James Lawless 8, with 275/55/20, Kelly Fierce S/T, Stealth Gray, Front leveling Kit FS2500 Oil Filter, Banks 6 Gun with PDA, Much more to come!!!
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Old 01-17-2007, 06:29 PM   #5 (permalink)
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8700 miles what a dealer demo????? The price is right on a new truck(the one you describe), dealer told me dealer demos not worth it, and when I ran the numbers realized they arent either, sometimes they are give out as loaner cars (ie read trashed), dont always receive all rebates, warrenty already started etc.
2007 Chevrolet Classic, 3500 SRW, D max LT1
Camping mirrors, camping package, xm radio, on star.
1987 Ford Ranger SXT, 5spd 2.9 v-6 4x4 daily driver.
1998 Dodge Ram 3500 Dually 12 Valve 4x4 10ft Dump Body

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Old 01-17-2007, 09:10 PM   #7 (permalink)
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39000 out the door a month ago for my 07/3500, 4x4, CC, DRW. 35,500 sounds high.
07 3500, CC, DRW, LB, 4x4, LBZ, McRat EFI Live, SC IV trans (1057), Cogs, sleeves, blocked and fingered, PPE race valve, KD dual lift pumps, TxC Electric Fans, 4"MRBP straight, Diamond eye DP, Snow MPG Max w/WallyMart Blue, MikeL trans cooler, Banks intake and turbo to IC pipe, Killerbee EOC, Mag-Hytec diff, PVC reroute. Colorado Springs.
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Old 01-17-2007, 09:50 PM   #8 (permalink)
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I purchased my truck August 7th 2006 with 18 miles on it I currently have 19,400 and not one problem out of it
2006 2500HD cc/sb 6.6 DURAMAX LBZ/6 spd Alli 4x4
Slightly modded

Thanks to :
McRat Racing, ATS, Nitrous Express
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Old 01-17-2007, 11:48 PM   #9 (permalink)
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these trucks are reliable. My LLY, which will be 3 years old at the end of march, has 163000 miles on it and everything is pretty much the original. Now my new LBZ will be seeing the same treatment as my LLY. I gave my 04.5 LLY to my dad.
06 2500HD CC SB LBZ Summitt White
ARE Topper w/ windoors and flipdown front window, Bed Rug
305/50/20 Copper Zeon LTZs on MB Motorizing Chrome Blitz
Diablosport, CB Antenna Mount Bracket (Stock Look),Tinted Windows, Firestone Ride-Rite Air Springs, Visualogic Backup Camera, Finger Stick and Blocker Plate, 4" MBRP exhaust, More Mods to come

04.5 2500HD LS 4X4 LLY Ext Cab LB Dark Gray Metallic 265/75/16 Bridgestone REVOS
Under seat storage / XM Satellite Radio / K&N Air Filter in Stock Box / ISSPRO Pillar Guages
ARE Impulse Topper with windoors w/ sliders and tilt down front window
Predator Diablosport/Fingers Stick and EGR Blocked, Plate/Straight-piped, Billsteins/Firestone Ride-Rite Air Springs

Member # 17 of NC DMax's Club
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Old 01-18-2007, 12:38 AM   #10 (permalink)
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I bought a new '06 LBZ and have put 20k on it in 8 months now. I've only had to have the computer reflashed to fix a powertrain shimmy, so I'd say I'm happy. Especially when it starts at -45 in Fairbanks, Alaska. I'll tell you this, the company that patrols and services the Trans Alaska Pipeline will only buy one truck to run up and down the state from Prudhoe to Valdez, and that's a GM duramax. The dodge's shell trannys and ford powerstrokes blow up. Based on friends' bad experiences and strangers i've had to pick up in the middle of nowhere while on hunting trips, i wouldn't buy anything else. I'd like to see how the new HD's do. Got mine for $39k loaded, but that's the Alaska price.

2006 GMC 2500HD LT CCSB D/A
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