ECU location? - 02 5.3

[TLfuRy]

Hi guys,
Where is the ecu in an '02 5.3 silverado? I bought my dad's truck and he had said he chipped it - but I have no idea what kind of chip, etc. so I want to look and find out.

Thanks in advance. :)

[NEUMANNZZ]

under the hood on the driver side forward of the fenderwell.

[TLfuRy]

under the hood on the driver side forward of the fenderwell.
Thank you! :)

[BadBowtie03]

he cant "chip" it... thats a term that has been carried over from OBD 1 computers in cars... he probably got a tune "loaded" onto the stock ecm. You wont be able to see anything different than stock.

[TLfuRy]

he cant "chip" it... thats a term that has been carried over from OBD 1 computers in cars... he probably got a tune "loaded" onto the stock ecm. You wont be able to see anything different than stock.
Yeah I noticed that once I got in there and looked at it. If I wanted to have a new tune done, does it matter that it may already have a tune done? I guess what I'm asking is, is a tune absolute or is it relative to the existing settings? I went through all the paperwork and I can't find any info regarding a tune but I know he said he had something like that done ("chip it" may not have been what he said).

[06Silverado5.3L]

Yeah I noticed that once I got in there and looked at it. If I wanted to have a new tune done, does it matter that it may already have a tune done? I guess what I'm asking is, is a tune absolute or is it relative to the existing settings? I went through all the paperwork and I can't find any info regarding a tune but I know he said he had something like that done ("chip it" may not have been what he said).

If he has a tune in it now, your new tune will overwrite it.

[TLfuRy]

Thanks!