Chevy Express 3500 tuning

pdalach

Member
Jul 26, 2019
41
3
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?
 

1quick

TCG Elite Member
TCG Premium
Jan 29, 2008
26,554
24,015
coal city
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
 

pdalach

Member
Jul 26, 2019
41
3
My rpo codes
 

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