Chevy Express 3500 tuning

pdalach

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I have a Chevy Express 3500... it's supposed to tow like a champ.

It doesn't.

My mechanic isn't seeing anything obviously wrong and without a trailer load, it moves at a good clip (though not as good as my mustang gt...clearly). Under load, it seems to bog down.

I thought that perhaps a tuner may help. Maybe a tuner could diagnose the problem or provide a better tuning? Is this a crazy thought?

If this isn't crazy, does anyone know a good tuner near the Southside of Chicago that works on tow vehicle?
 

DEEZUZ

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Soooo like what motor
 
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pdalach

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Pulling a 4500# travel trailer (dry weight) and a van full of kids.

Any thoughts on the tuning?
 

1quick

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It may help, my dad has a bone stock 2500hd with a 6.0 and pulls a 10500lb boat across the country just fine, maybe there’s an actual issue with the motor, you could test fuel pressure under load and see if the pump is weak but not dead yet, if it’s high miles check the plugs and wires maybe just do a full tune up
 

DEEZUZ

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Is this 4l80 4l85 or what?
 

DEEZUZ

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Maybe look into duramax powered one?
 
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pdalach

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I've looked into a duramax...short of getting custom new, hard to find a Duramax passenger.

My van has the specs I want... If only it'd work right.
 
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pdalach

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2006. 75k miles. Used to be a corporate fleet shuttle, I think.
 

DEEZUZ

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i think you need to focus on what gears.
 

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