Question about 1989 GMC Sierra
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Posted on Jan 02, 2017
Usually somewhere on the engine or in the engine compartment, there is a sticker with the engine specifications. The spark plug gap should be included. If not .032 or an inch should be close.
Posted on Jun 26, 2008
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
That aluminum collar will come off with the boot. Go ahead and grasp the spark plug boot and twist the boot left and right and then continuing to do that pull towards you and it will come off for you. Hope this helps
Posted on Apr 09, 2009
Without taking the tilt mechanism off you can only reach 2 of the 3 bolts. If you use 1/4 in. socket on 1/4 in drive with 6 in extension you can just get at the left bolt. If you remove the tilt spring you can get to the bottom bolt. To remoce tilt spring retainer use standard Phillips.
Posted on Jul 19, 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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