I have a 94 GMC Sierra 1500, 350 engine 5.7 liter... I want to adjust the timing on it is it possible that I can do it manually by myself??? please help!!

Asked by Jun 07, 2013 at 10:35 AM about the 1994 GMC Sierra 1500 C1500 SL Extended Cab LB

Question type: Maintenance & Repair

2 Answers

16,895

yes, you need to find the wire to disconnect that disables the computer timing control. Its a little tan/black wire that should be around the passenger floor board/under dash area. It will have a little conntection in the middle of the wire you disconnect. After that you get a timing light and adjust it by losening the distributor an rotating it. The timing should be set at 0 degrees, there is usually only 2 marks on the timing cover, the bigger one is 0 degrees.

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after I do that I plug it back up

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