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It depends on what you did and what year. If its a vortec, and you didn't pull the distributor, all you have to do is make sure the marks on the timing gears are lined up and your good to go. The computer does the rest. Some times you have to reset the computer though. If its older, there's a wire under the pass side dash. You have to unplug it. Time the engine with a timing lite, and then plug it back in and the computer takes care of the rest. The wire should be brown and white with a single connector. (If you pulled the distributor on the vortec, you have to take it to a shop and have them put it on the computer).

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โˆ™ 2010-11-20 13:59:55
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Q: How do you reset the timing on a 4.3 engine?
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