EST location to set timing

[00Buck]

89 suburban. Can't find the EST (Electronic Spark Timing)wire (tan w.black strip) to unplug to set the timing. This has to be unplugged before i can set the timing.
Or does anyone have their timing set without unplugging the EST?

thanks

Mark

[maxwedge]

Look under the r/s lower dash behind where the carpet meets the lower dash under the heater case, pull back the rug.

[00Buck]

Great, I will look for it there. The book said that it was near the dist but looked for a good hour and couldn't find it.
thanks

[Elbert]

on my 92 k1500 the wire is on the passenger side firewall, under a small black plastic cover.....see where the heater hosees connect to the heater core just above that on the passenger side firewall. THere are a couple of black plastic nuts that hold the cover on.

[kenny-1907]

I used to own an 88 full size jimmy with a 350 in it and that wire was under the hood on the passenger side firewall but it was not behind any kind of cover though.

[horse482]

They didn't start putting the est connector under the dash until '94, so it is going to be under the relay cover, right side fire wall under the hood.

[Elbert]

yes...I should have said under the hood, passenger side firewall, under the small black plastic cover