RPO code ZN4

[nubuilder]

I'm trying to get a different dash for my '98 S10 (and found a complete, perfect matching one for $75) and the question I'm getting is "is it with or without the code ZN4?". The junkyard guy is telling me they are two different dashes and are not interchangeable.

I am unsure if I have the code or not, but I don't think I do.

This is all I've found.

Product Availability

Due to marketing concerns, some models may have VIN badges to indicate one model year, but the engine content may actually be of a previous, or of a future year. This can cause confusion when trying to reference a Model Year (MY) for service concerns. To address this, two RPOs have been designated to indicate a MY "pull ahead" or "Push back". These RPOs (and an explanation) are as follows.

1. RPO "ZN4"

Which means a vehicle is badged for one model year while it is being manufactured into the next (pushed back). A specific case of this are some 1998 S/T pickuptrucks which are VIN'd as 1998, but are manufactured after the traditional August changeover, and contain 1999 Powertrain components. These trucks would contain RPO "+ZN4".

From my understanding, this just means that a late '98 was made under the '98 year badging, but has '99 components (which might be when they went to the 0411 ECM and redid all the electrical; I think '00 for sure the electrical system is different).


Do you guys know anything about the interchangeability or any more info on the code itself?




EDIT: I also just got a stock CD player and will be trying to reset/unlock it.

 

[Texas Jim]

Aren't the RPO codes on the inside of the glove compartment???
They USED to be...

 

[NMRam]

Just say no and buy it......if it doesn't work for whatever reason, you should be able to get $75+ out of it on CL.

 

[nubuilder]

Aren't the RPO codes on the inside of the glove compartment???
They USED to be...

Yes they still are. I just got to the truck and checked it. I don't have the code.

Just say no and buy it......if it doesn't work for whatever reason, you should be able to get $75+ out of it on CL.

I'll just say "yes I have it" and buy it. I really don't see why the dash panel would be any different; yes the electronics of the truck and wiring are different, but I highly doubt GM would make changes to the dash itself.


Oh, and the CD player works. The junkyard must have unlocked it already or something. All I did was plug it in and the radio works. Hopefully it doesn't lock on me when I start the truck this fall.

 

[Texas Jim]

Aren't the RPO codes on the inside of the glove compartment???
They USED to be...

Yes they still are. I just got to the truck and checked it. I don't have the code.

I'll just say "yes I have it" and buy it. I really don't see why the dash panel would be any different; yes the electronics of the truck and wiring are different, but I highly doubt GM would make changes to the dash itself.

Oh, and the CD player works. The junkyard must have unlocked it already or something. All I did was plug it in and the radio works.
Hopefully it doesn't lock on me when I start the truck this fall.

You are going to wait till "FALL" to even "START" the truck???
Why????

 

[nubuilder]

Aren't the RPO codes on the inside of the glove compartment???
They USED to be...

Yes they still are. I just got to the truck and checked it. I don't have the code.

I'll just say "yes I have it" and buy it. I really don't see why the dash panel would be any different; yes the electronics of the truck and wiring are different, but I highly doubt GM would make changes to the dash itself.

Oh, and the CD player works. The junkyard must have unlocked it already or something. All I did was plug it in and the radio works.
Hopefully it doesn't lock on me when I start the truck this fall.

You are going to wait till "FALL" to even "START" the truck???
Why????

Do you think it will change anything once started? I thought the ECM/BCM communicated to the radio/rest of the truck when the key is turned on.

I suppose I can go fire it up.



EDIT: Fired it up and ran it for 30sec and the radio worked just fine.

 

[Texas Jim]

 

[drperry]

Aren't the RPO codes on the inside of the glove compartment???
They USED to be...

Yes they still are. I just got to the truck and checked it. I don't have the code.

I'll just say "yes I have it" and buy it. I really don't see why the dash panel would be any different; yes the electronics of the truck and wiring are different, but I highly doubt GM would make changes to the dash itself.

Oh, and the CD player works. The junkyard must have unlocked it already or something. All I did was plug it in and the radio works.
Hopefully it doesn't lock on me when I start the truck this fall.

You are going to wait till "FALL" to even "START" the truck???
Why????

Do you think it will change anything once started? I thought the ECM/BCM communicated to the radio/rest of the truck when the key is turned on.

I suppose I can go fire it up.



EDIT: Fired it up and ran it for 30sec and the radio worked just fine.

It only locks if the radio is set to lock... At least, it's supposed to

 

[nubuilder]

Dennis, do you know anything about the ZN4 code? I really don't think GM would change the dash.

And yeah, I was really shocked the radio worked right away.

 

[Texas Jim]

I think that as far as the engine... it means that the starter, bellhousing, and some other bolts, were metric.
After 1999-2000 ALL bolts are metric.