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Diesel Conversions Convert gas to diesel, or convert to a 6.2/6.5/Duramax/Cummins/Navistar/Isuzu/Perkins/Detroit/or ... diesel engine. Go here to see completed projects, works in progress, share your conversion or ask the experts.

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  #1  
Old 10-14-2009, 10:54 PM
SubDiesel03 SubDiesel03 is offline
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Default 2003 Suburban 4x4

hey guys im new to forum and i am buying a 2003 chevrolet suburban 4x4 its got the 5.3 in it and i want to drop a duramax and allison transmission in it....i have read a bunch of info on this stuff but nothing that helps in does wires need to all be repined and traced or is it plug in and boom....motor mounts need to be changed or not.....and i know i need 3" body lift thats no problem....also what else would i need to change or get to make the vehicle reliable and run....all help will be appriciated......im new to diesel but have built many all motor and turboed cars so good with machanics
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Old 10-15-2009, 10:22 AM
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More Power More Power is offline
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Welcome to the board!

Actually, a 2" body lift is usually sufficient to provide enough clearance for the Duramax/Allison.

You'll need the radiator core support to work with the Dmax radiator and intercooler. Most of the wiring will simply be a plug-n-play excercise. There are a couple of very minor differences, but overall it's an easy conversion.

You may need the motor mounts for the Dmax, though I haven't seen the equivalent mounts used on a gas engine.

You'll need the hydraulic brake booster and master cyl used on the diesels.

Jim
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Old 10-15-2009, 10:38 AM
SubDiesel03 SubDiesel03 is offline
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where would i go to find a wrecked diesel or to even start looking for ones im in arizona if that helps
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Old 10-15-2009, 12:16 PM
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I would begin a search of eBay. Ebay frequently lists "Duramax conversion packages" for sale that contain all or most of what you'd need. If you know someone in the auto insurance business, ask them to help you locate an insurance salvage auction in your area, looking for a wrecked Duramax/Allison equipped truck. Local retail auto salvage yard prices usually discourage conversion prospects, but do remain a potential source for at least some of the pieces.

Failing that, the following auto salvage centers have helped with conversion packages in the past:

Schram Auto Parts
Waterford, MI
1-800-462-9292
Mason, MI
1-800-292-1032
www.SchramAuto.com

Stricker Auto Parts
Batavia, OH
1-800-582-5405
www.StrickerBros.com

G&R Auto Parts
Oklahoma City, OK
1-800-678-3377
www.GandRAutoParts.com

Nordstrom's Automotive, Inc.
Garretson, SD
1-800-272-0083
www.NordstromsAuto.com

Spalding Auto Parts
Spokane, WA
1-800-366-2070
www.SpauldingAutoParts.com
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Old 10-15-2009, 01:11 PM
SubDiesel03 SubDiesel03 is offline
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ok thanks and i shoujld look for a 2003 right so its same year on everything
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Old 10-17-2009, 02:54 PM
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Using an engine/trans the same model year of your Suburban would likely make it easier, though I might be tempted by super deal for an engine/trans that was newer.

http://www.thedieselpageforums.com/t...ad.php?t=35589

Jim
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Old 10-28-2009, 11:02 AM
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Is it a 3/4 ton Suburban? With the 5.3L it sounds like a 1/2 ton. So if it is, think about the axles and transfer case donation as well when you scope out a donor truck. The ten bolt rear in a GM 1/2 ton will likely explode on you with the Duramax torque.
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2012 Chevy 2500HD ECSB, 6.0L gas, 6spd, 4x4, LT
1983 GMC K2500 pickup - working on a Cummins 5.9L swap
1987 GMC K3500 Dump, 6.2L diesel, TH400 auto
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Old 06-08-2016, 09:02 PM
1320bighead 1320bighead is offline
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Default 03 Suburban Duramax swap

Hi there new to this page was wondering if I can get some help I did a conversion on an 03 Suburban with an 05 LLY Duramax the Suburban starts but will not run because there is no communication with the TCM I've seen somewhere in this page I read that there was wires to be repaired any information on that any info would be highly appreciated thank you
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