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Old 07-12-2022, 03:30 PM   #7
suburban99
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Join Date: May 2014
Location: Mission BC
Posts: 473
Re: Swapping an LS into a 50 GMC fuel questions

Ok just for reference the problem was the TAC module and ECM wee not wired to KEY ON. The TAC was wired to BAT. Apparenty they both have to power up together. And when I shut it off the ECM turned off but the TAC remained powered up. That's why I heard a click 5 seconds or so after turning it off. All good now.
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1962 C10 Longbox LS 5.3 4L60E----Sold$$
1972 K10 Custom Deluxe LS 6.0
1950 GMC 3100 S10 & LS swapped---sold
1955 f100 LS swapped----sold
1968 C10 shorty project
1971 C10 longy project
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