Any way to make 2014 Silverado 5.3 idle a little louder?

[nicul15]

They get a zl1 pump in the tank

[TriPinTaZ]

Well, she does have the same clutch at least as far as gm performance list it. It does have free'er flowing exhaust from factory - only thing other than rearend or trans gearing ratio's listed as being different as far as power train goes... Only thing in the tune I can see that's really changed are a few of the idle torque controls, but these only should control surging and then the more important is the higher fuel pressure that it runs on. They shifted the entire axis to make it hit higher pressures sooner. Also appears it's got the ability to run on higher base pressure. Torque models as listed are exactly the same though.

I don't doubt that there are tables missing - there always are...

Sadly I think HPTuners is currently working to remove tables to appease the EPA overreach. $#^#*&$^&Y% Government BS.

They get a zl1 pump in the tank

Yessir I Can confirm this as well. I tuned this 2021 SS 1LE and the low side held 72-76 PSI on E70. In fact this car did better on full E than any non 1LE SS that I've tuned in regards to fuel capacity. The high side and injector values were the same but I think having the low side maintain that pressure is great.