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dwcsr · 11-21-2009, 01:26 PM

It depends on the transmission. If you run a TH400 , 700R4 or a 4L60/80e. You need the engine harness at minimum and the trans harness if you run an e version trans. LS1truck.com or LT1swap.com has some good info.

I'm looking at this same swap for a 58. The harness is the expensive part. I see companies will reprogram the PCM for $75 and redo the harness for up to $600.

11-21-2009, 01:26 PM	#2
dwcsr Hollister Road Co. Join Date: Apr 2005 Location: Houston Posts: 6,134	Re: LS engine computer. It depends on the transmission. If you run a TH400 , 700R4 or a 4L60/80e. You need the engine harness at minimum and the trans harness if you run an e version trans. LS1truck.com or LT1swap.com has some good info. I'm looking at this same swap for a 58. The harness is the expensive part. I see companies will reprogram the PCM for $75 and redo the harness for up to $600.