I bought my 2007 Silverado 2500HD Classic in December. It was bone stock with 24,500 miles.

Mods since are:
Cam
new springs, keepers, locks and 7.4 pr's
TVS1900 Magnuson s/c
Headers, catted mids and a magnaflow muffler
Wideband and fp gauges

Data logging detects knock. So we recently pulled the heads and replaced the lifters with GM replacements. Definitely got quieter but we still have issue's.

The truck has a custom tune, but the tuner has decided that I should look for a new tuner.

Truck runs RICH. AFR's jumped to 10.0 at the touch of the throttle. HPT senses knock when the truck needs to downshift and doesn't or just prior to an up shift.

I NEED HELP. I have a truck that I bought and modded to be my tow vehicle. I have a brand new 24' trailer that has never been hooked to the truck.

Can someone look at this tune and log file, and suggest a tuner? I have HPT but to say I am a novice is putting it mild.

Thanks, Tom

 

Get with one of the sponsors, they'll get you a decent mail order tune. As long as you don't plan on tinkering with it all the time, they should be more than adequate.

 

Looks like two options? Nelson Performance or Black Bear

 

There's Wheatley and Klug as well.

 

^^^^ thanks. I will contact them.