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- - 5.3 conversion???? (https://67-72chevytrucks.com/vboard/showthread.php?t=651352)

ls1man

11-29-2014 09:10 PM

5.3 conversion????

I have 5.3 out of a 01 1500 silverado with stock ecm and modified wiring harness do i need to turn off vats before trying to start?

chev3600

11-29-2014 10:12 PM

Re: 5.3 conversion????

Yes. It will not run with vats enabled.

skymangs

11-29-2014 11:56 PM

Re: 5.3 conversion????

Definitely need the vats removed. If you don't want it spitting codes, it should have the downstream O2's and emissions diabled. I use Brendan from LT1swaps.com for PCM work.

yossarian19

11-30-2014 01:14 AM

Re: 5.3 conversion????

You'll also have some cross member / framing work to make it fit, driveshaft, etc.

ls1man

11-30-2014 10:06 AM

Re: 5.3 conversion????

Anybody use a bypass module? They sell them on ebay for $16

yossarian19

11-30-2014 10:29 AM

Re: 5.3 conversion????

Sure, you could do that.
If you aren't planning to run all 4 oxygen sensors, an evap can & catalytic converters, though, you'll need an ECM flash to keep from spewing trouble codes.
If you're getting an ECM flash, just ask them to remove VATS at the same time.

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