Home of all dually trucks with the GMC/Chevy 3500HD series truck a point of interest.

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You can appreciate the “beef” of the GMC/Chevy 3500HD trucks, a stripped rolling 3500HD chassis weighs more than a running C1500!

When posting on this site you won't have to explain what the 3500HD Beast is! ie 19.5 wheels, straight axle, 10 bolt wheels, 15000lbs GVW, 4 Wheel Disc Brakes etc

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Welcome to the forum created October 2009

Recent Posts

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Suspension-Brakes-Hydraulics / Brake rotor/hub set up
« Last post by Skysdad413 on January 05, 2018, 05:48:09 AM »
Does anyone know if a 93ish p30 8 lug rotor fit on a 97 HD front axle. I’m wanting to change from 10 lug front wheels to 8 lug wheel without adapters or drilling my hubs.
Off Topic Items-Politics-Jokes etc / Re: TBI tuning option!
« Last post by ED-NY on January 04, 2018, 06:14:59 PM »
Don't remember which engine you have but fuel alone won't make a huge difference. As you know, heads, cam and exhaust need to be included in a performance upgrade.  I have had luck un-soldering the proms in 1227747 ECM and soldering in a zif socket so we could use a flashable prom.

What I did with my current 3500HD is install a TPI setup and wired in a TPI ecm to run it. Did not put it on the road yet, it's done but I don't want to drive it in the Winter.  The truck is parked outside and has been sitting for a couple of months....this AM it fired right up. I'll know in Spring how it works, the TPI engines are noted for low end torque.
Tech - Help Area / Re: Lubrication
« Last post by RPF207 on January 04, 2018, 06:02:11 PM »
Every u-joint, 7-8 depending on rear driveshaft set up
Front and rear drive shaft slip-n-stub joint each has 1
Each sway bar link has 1
Upper and lower king pin on each side
Tie rod ends, 3-4 depending on steering set-up
I think my truck has 19 grease points.
In stock form the suspension has no grease points.
Off Topic Items-Politics-Jokes etc / Re: TBI tuning option!
« Last post by MrC. on January 04, 2018, 01:56:25 PM »
Hey Ed.

I'm glad you posted this.

I have been reading we (3500hd's) have a higher pressure regulator factory. I have read it is 30 psi as opposed to the 13-15 psi of a half ton truck. I have also read we have small stock injectors 42#. I have been thinking about replacing my stock injectors with 55-60# units. and adding a chip (maybe a custom one) along with free flowing exhaust (no cats).
Would you see a power gain in this setup of am I missing something?

I had a 95 tbi 1/2 ton w/ 305 back in 96, I changed out to larger Holley injectors, and raised the stock pressure to 20 psi, along with a chip and underdrive pulleys and exhaust, it was noticeable. and smoked stock 350's of the day. I was hoping to repeat those results with my 3500hd.

Any advice?

Tech - Help Area / Lubrication
« Last post by Blackmamba on January 04, 2018, 12:37:21 PM »
May seem like a stupid question but my 4x4 hd is relatively new to me and there are very few of them in the UK, my Haynes doesn't cover HD models, I assume these trucks have grease points on the suspension etc, does anyone have a definitive list? Thanks
Member Projects / Re: The cheapest, Ugliest dually on CL
« Last post by MrC. on December 31, 2017, 09:10:26 PM »
Thanks ed.
I used 4 inch channel on the other mounts. I don't like welding on a frame. Also I cut 14 inches total off the bottom of the headache rack.
and this bed is a true 8 ft. wide.

Thanks again for all your help.

Member Projects / Re: The cheapest, Ugliest dually on CL
« Last post by ED-NY on December 31, 2017, 08:28:50 PM »
That bed height doesn't look bad at all.... and it's a bolt on.
Tech - Help Area / Re: Increasing performance
« Last post by MrC. on December 31, 2017, 06:28:46 PM »
One more thing, I have read that our gas trucks have a 30lbs fuel pressure regulator and #42 lbs injectors, if that so #52 or #60 lbs injectors should wake up this engine.
I would not advise more, unless you changed heads,cam,headers,intake and require ore fuel.

Member Projects / Re: The cheapest, Ugliest dually on CL
« Last post by MrC. on December 31, 2017, 06:00:49 PM »
Well here we are today.
Bed is mounted, I ended up raising it 3 inches so I could run the fuel filler neck between the truck frame and bed frame. I could not come up with another option that I liked.
I had to completely rewire the entire bed seemed P.O. liked tape and splices.

Tomorrow I will hook it up to the trailer and test the brakes. I am happy with the out come so far. still along way to go but moving forward.
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