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Daniel Wilson
Daniel Wilson,
Category: GMC
Satisfied Customers: 4772
Experience:  Owner at DJ Wilson
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GMC Sierra 1500: Where is the ESC module on my 1993 GMC 4.3

Customer Question

Where is the ESC module on my 1993 GMC 4.3 litre V6 Pickup 1500 Sierra?
Submitted: 1 year ago.
Category: GMC
Expert:  Daniel Wilson replied 1 year ago.
Hi my name is***** will be glad to help. Bare with me while o pull of some info for you.
Expert:  Daniel Wilson replied 1 year ago.
Automatic or standard trans?
Customer: replied 1 year ago.
Auto
Expert:  Daniel Wilson replied 1 year ago.
I know the 350 ci manual transmission trucks have a 4 pin ignition module with an external esc module mounted on a plate on the intake manifold on the passenger side.The 350 automatics use a seven pin module without an external esc module.They incorporated that module in the ignition module and the ecm. Let me see if this one is the same
Expert:  Daniel Wilson replied 1 year ago.
1993-95 trucks, the ESC is a removable part of the ECM (PCM) called a MEMCAL. There is no external ESC on the trucks, just on 88-92.
Customer: replied 1 year ago.
the ECM is behind glove box? how to replace?
Customer: replied 1 year ago.
ESC?
Expert:  Daniel Wilson replied 1 year ago.
They stopped using the ESC in 1993
Expert:  Daniel Wilson replied 1 year ago.
Electronic spark control (ESC)
Expert:  Daniel Wilson replied 1 year ago.
Used to be mounted on the intake near the EGR and MAP sensor
Customer: replied 1 year ago.
but you said it is a removable part of the ECM
Customer: replied 1 year ago.
and i have purchased a new one
Customer: replied 1 year ago.
are you there?
Expert:  Daniel Wilson replied 1 year ago.
there were a few different setups used during that year and it was a transitional year in 93 so the only way to know 100% is a dealer lookup by VIN as I have heard cases where the parts stores will show a listing, sell the part, and then it doesnt exist on all vehicles that year.
Expert:  Daniel Wilson replied 1 year ago.
Got a part number of the one you bought?
Customer: replied 1 year ago.
standard LXE7
Expert:  Daniel Wilson replied 1 year ago.
If yours was built with the ESC it will be mounted at the intake manifold in most cases. I have heard some were mounted on the firewall but i have not had the opportunity to see a firewall mounted one yet.
Expert:  Daniel Wilson replied 1 year ago.
anyway, If you are not seeing it, return the part because yours does not have it and was built after the change.