1989 Astro Van ECM Access/Removal

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Tom - 07 Sep 2005 17:50 GMT

I am trying to replace the ECM of my 1989 Chevrolet Astro van but do
not know how to locate the ECM. According to the diagram on its service
manual, it's a series "M" van and the ECM is located close to the
firewall of the passenger side compartment, on the "right hand side
plenum panel" with four mounting screws. I looked at the passenger side
but had no clue where it could be. Should I remove the entire plastic
vent housing facing the passenger seat first in order to find the ECM?

Any help is appreciated.

Tom

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Tom Ivar Helbekkmo - 07 Sep 2005 18:38 GMT

> I am trying to replace the ECM of my 1989 Chevrolet Astro van but do
> not know how to locate the ECM.

According to my Haynes manual, it's inside the car, hidden behind the
kick panel in front of the passenger side door. That is, it's inside
the side wall of the passenger compartment, in front of the right
front door, such that the passenger's right foot would lean against it
if the covering panel were not there.

> Should I remove the entire plastic vent housing facing the passenger
> seat first in order to find the ECM?

No, but if you start finding coolant on the floor on the passenger
side, you'll want to. That's where the heater core is hidden. :-)

-tih

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Don't ascribe to stupidity what can be adequately explained by ignorance.

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tudysmuck@yahoo.com - 08 Sep 2005 01:12 GMT

follow the cluster of wires to da box

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Tom - 08 Sep 2005 05:32 GMT

Right on and thanks a lot!

However, after replacing the ECM, still did not get any spark. I
followed the ignition coil checks in the service manual and it seems to
be OK. Any suggestions?

It died on the road last Monday and unfortunately I removed the battery
for charging and thus the only code I got from scanner is code 12.

Tom

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