Question about 1993 GMC Sierra
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Posted on Jan 02, 2017
SOURCE: spark plug wiring diagram
I dont understand why you would need that unless you took off all the wires and took out all the plugs and forgot how the wires were.I have the same truck and I always do the plugs and wires one at time to make sure I make a mistake.If this is your ploblem let me know because i might be able to walk you though it.
Posted on Jan 22, 2009
This actually depends on what plug you are using. A platnium plug should gap at .060" while the conventional plug is gapped at .045". The AC delco 41-392 gaps at .060" while the AC delco rapid fire gaps at .045"
. I would recomend the 41-392 and gap it at .060" however there is some desperity in the manual and labels on this matter as platnium plugs were a newly offered back in that day.
Posted on Jul 26, 2009
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