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| | | 04.5-05 LLY Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect |  |
07-19-2008, 10:24 AM
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eBay Motors
#1 (permalink)
| | Junior Member
Join Date: Jul 2008
Posts: 15
| 285's or 265's wondering what size i should go with. id like to keep from lifting the truck if possible, more of a sleeper truck. but id still like to have the wheel wells filled out a little more. they will be mounted on 17 x 9 dc-1 wheels. what do you think the 265's will look like. will the 285's have clearance issues with the stock suspension. thanks for any input.
Last edited by smokin6.6 : 07-19-2008 at 10:37 AM.
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07-19-2008, 10:54 AM
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eBay Motors
#2 (permalink)
| | Catch Me If You Can!
Join Date: Oct 2007 Location: Greenville, KY
Posts: 3,190
| With the 285s you will probably have to crank the t-bars a little and trim the front valance. The 265s will fit with out any modifications.
__________________ KYLE
05 Chevy LLY Crew Cab LT Dually 4x4, Crank it up Diesel Tie rod sleeves and centerlink, BD Diesel Remote Fuel Filter, EGR Blocked, TTS Dual Lift Pumps, FPRV Shim, Bullydog Outlook Monitor, AFE Stage 2 CAI and modded turbo mouthpiece, BD Diesel Manifold, Diamond Eye Turbo Direct Pipe, Diamond Eye 5" exhaust straight piped, Level Kit, Suncoast Stage IV w/ 1056 Torque Converter and Allison Deep pan EFI Live Tuned by IdahoRob!!!!
1981 VW Rabbit Pickup, 1.6L Diesel, 4 Speed Manual, 35 MPGs |
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07-19-2008, 03:16 PM
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eBay Motors
#3 (permalink)
| | Member
Join Date: May 2008 Location: East Bethel, MN
Posts: 54
| Go with the 285's better look and ride! might cut mileage a little but hell fuel is only $4.65 a gallon!
__________________ 2006 silverado CC silver birch kmc hoss 20's 305/50/20 nitto's s&b intake and amsoil oil. ppe economy tuner more to come... |
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07-19-2008, 03:21 PM
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eBay Motors
#4 (permalink)
| | Save Water, Drink Beer
Join Date: Nov 2007 Location: St. James City, Florida
Posts: 762
| I have had 285's on my truck and it did cut some millage. I now have 265's and they still look sharp and give better millage. Good Luck
__________________ 2006 GMC 2500HD LBZ Crew Cab 4x4, Silverline Turbo Back Dual Exhaust, PPE Hot Programmer, Egr Block Plate, PPE Air Box Mod, 2in. Plug, SES Light
Full Bore Exhaust Manifold compliments of BD Diesel. |
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07-19-2008, 03:54 PM
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eBay Motors
#5 (permalink)
| | Member
Join Date: Jul 2008 Location: Lititz, Pennsylvania
Posts: 61
| I'm running 285's and will never go back. You will have to trim the front valance a bit, but shouldn't have to crank the t-bars at all. It will mess up your speedometer a bit, mine did about 4 mph at 65. This will account for your fuel mileage drop. Mine didn't drop more than about .75 mpg adjusted.
__________________ '04 GMC LB7 Crewcab Shortbed
AFE Stage 2 Intake
Diamond Eye 4" Single Exhaust
Edge Juice w/Attitude
Air Lift 5,000Lb bags with Ride Control
B&W Turnover Ball
RollBAK roll tarp |
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07-19-2008, 03:57 PM
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eBay Motors
#6 (permalink)
| | Member
Join Date: Jul 2008 Location: Lititz, Pennsylvania
Posts: 61
| Make sure you keep the weight rating that you need. I needed load range E and the only one's available in 285's were BFG All Terrain T/A's.
__________________ '04 GMC LB7 Crewcab Shortbed
AFE Stage 2 Intake
Diamond Eye 4" Single Exhaust
Edge Juice w/Attitude
Air Lift 5,000Lb bags with Ride Control
B&W Turnover Ball
RollBAK roll tarp |
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07-19-2008, 04:57 PM
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eBay Motors
#7 (permalink)
| | BRAIN SURGEON !!!haha
Join Date: Mar 2008 Location: Louisiana,when they let me stay
Posts: 2,008
| I put the 285/75/16's on mine no mods..But with the 17 inch you may crank the torsion bars a bit,then if you like you can trim the air dam at bottom of front bumper,I am goin back to 265's just to see where I can get my mileage.I can squeeze 22mpg at 70 mph[unloaded of course]with the 285's.So I am thinking that I could use the 1-2 mpg I lost when puttin the 285's..Good luck!!! 
__________________  There she is<<
2006 GMC 2500HD4x4 sb cc LBZ!!!  52k
MODS/Full straight pipe,res mod,SC Fpaq tuner,285/75/16's
Additional gray Berber carpet on floorboards/courtesy of a customer whose home we just built!!!!FREE
2002 GMC 1500 2wd x-cab-sb 5.3l.
1987 89,000k 305H.O. 700-r4[pearl white/red striped]
1978 Malibu[2dr]350c.i./350hp TH-350 trans/jus a lil quick!!! |
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07-19-2008, 10:46 PM
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eBay Motors
#8 (permalink)
| | Super Man Moderator Points: 10,388, Level: 43 |
Join Date: Oct 2006 Location: Irwin PA
Posts: 3,081
| I had 285's on my truck and went to 265's I missed the look and went back to 285's. The 285's dont get as good mileage but they look better. Most people get 8 wide wheels so your 9 might make the tire a little shorter that it would on a 8. You might have to crank the torsion bars a little but not where it will hurt anything. The only think is if you adjust the torsion bars you gotta get a alignment when your done.
__________________ Jason 2006 Silverado Shortbed Crew Cab LBZ Escalade handles, Line-x, Painted bumpers and towing mirrors, Tinted Front Windows & Tail lights 4 Kicker 10in Subs & Punch 250amp in 2 custom boxs. Autometer Ultralite II Pyro & EGT gauges with pillar pod MBRP Turbo Back stainless exhaust (Straight piped), AFE Stage II Intake, PPE Hot+2 285/75/16 Nitto Terra Grapplers on Gear Alloy wheels Lost Kitty Reward if found!! 1999 Ford F-550 Powerstroke Tow Truck-Wrecker **Jerr-Dan Bed, S&B Intake |
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07-19-2008, 10:52 PM
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eBay Motors
#9 (permalink)
| | DuramaxForum Fanatic
Join Date: Mar 2008 Location: SoCal
Posts: 578
| I have 285 and love the look of them. I would love to get a little bigger wheel though.
__________________ 2002 Chevy LB7 Crew Cab
Bone Stock for right now!! Looking to add some real power>
16 inch Helo Rims and 285 Nitto Terra Grapplers
Thank you Duramax Forums |
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07-20-2008, 09:19 AM
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eBay Motors
#10 (permalink)
| | DuramaxForum Fanatic
Join Date: Jan 2008 Location: Roswell, NM
Posts: 573
| If you are running a different wheel with the tire you will have to crank on the torsion bars. When I had 285s on the stock wheel I did not have to adjust anything. I put the same tires on the aftermarket wheels and I had to crank the bars up three turns. I will eventually put a leveling kit on but for now I just have the bars turned up.
__________________ 06 2500 CREW CAB 4X4 LBZ
4" DIAMOND EYE EXHAUST, KITTY RAN OFF!!!
DIABLO @ 120HP. 285/75 BFG's RUNNIN ON ULTRA 16's
PIONEER HEAD UNIT RUNNIN SCOSCHE AMP W MTX TWINS
AIR BOX IMPELLER REMOVED!! RESONATOR PLUGGED !!!
AUTOMETER ULTRALITE GAUGES IN POD. TRANSGO JR WORK RIG
O7.5 3500 CREW, LMM, ROYAL UTILITY BED
4" DIAMOND EYE EXHAUST. QUADZILLA PROGRAMMER. MTX AMP AND 10" TWINS IN THE BACK. STEPS,VISORS,BUG SHEILD. AIRBOX IMPELLER REMOVED,RESONATOR PLUGGED,LOTS OF PRETTY DIAMOND PLATE EVERYWHERE |
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