New to dmax, what upgrades?

[jlwoods99]

Recent convert to duramax , I bought my brothers 04 cc 3500 4x4. It has approx 80k for miles. My brother bought it new. We want to tow a 37' 5th. Wheel rv. Any suggestions on what upgrades I need to make? Thanks any info will be appreciated.

 

[79jasper]

Efi live tuning.

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[jlwoods99]

Like the ez tuner?

 

[79jasper]

No, efi live. Lol
I think the ez lynk is ppei.

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[Ruger_556]

Replace the suction fuel lines from the tank forward if it hasn't been done yet.