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jed971959 · 03-20-2021, 03:00 PM

Hi did you get it running
what tune file do you have in the computer
my 5.3 had no spark after doing the harness. I found that I put a 2005 tune file and used wiring harness for 99-02

03-20-2021, 03:00 PM	#261
jed971959 Registered User Join Date: Jun 2009 Location: barrie ont Posts: 99	Re: Orson the 49 GMC ~ Chris C. Hi did you get it running what tune file do you have in the computer my 5.3 had no spark after doing the harness. I found that I put a 2005 tune file and used wiring harness for 99-02