2002-2003 engine wiring harness difference

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2002-2003 engine wiring harness difference

Postby Rinny [OP] » December 1st 2020, 7:01pm

Does anyone know off hand the basic difference between the 2002 and 2003 engine wiring harnesses in our vans?
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Re: 2002-2003 engine wiring harness difference

Postby dcsleeperdcsleeper is online! » December 1st 2020, 8:39pm

egr went away
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Re: 2002-2003 engine wiring harness difference

Postby pmou » December 2nd 2020, 1:21am

I could share the component view from my 2003 manual if that is helpful, not sure which one you know/have already

edit: looks like in your sig you list a 2003.. so nevermind..
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Re: 2002-2003 engine wiring harness difference

Postby AstroWill » December 3rd 2020, 4:50am

Rinny wrote:Does anyone know off hand the basic difference between the 2002 and 2003 engine wiring harnesses in our vans?


There shouldn't be much at all. Do you have the GM Techline eSI? It's a great reference and would have the wiring for both that you could compare.

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Re: 2002-2003 engine wiring harness difference

Postby Leeann_93 » December 3rd 2020, 4:59am

There is no difference I can think of.

My '02 doesn't have an EGR and neither does my '05. An '01 does have an EGR, mind.


The differences between an '02 and an '03 are essentially brakes: an '02 has rear drum while an '03 has rear disc. Front brakes are single piston '02 vs. dual piston '03.

Both '02 and '03 are X vin, so they both have MFI injectors.
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