Lateral Arm OEM part #s?

I am having difficulty locating the part numbers for the right and left lateral arms on a 98. Any help is much appreciated.

You mean lower control arms? Or the rear arms?

http://www.rockauto.com/en/catalog/buick,1998,riviera,3.8l+v6+supercharged,1303322,suspension,control+arm,10401

The rearward lateral arms, not the control arms or adjustment links.

http://www.rockauto.com/en/moreinfo.php?pk=6117120&cc=1303322&jsn=8 These?

I think so, but what is the GM part number?

Ahh, you look for it, LOL

https://rivperformance.editboard.com/t7618-faq-the-holy-grail-of-riviera-part-numbers-diagrams

RivieraRyan wrote:

I think so, but what is the GM part number?

GM part numbers are typically under the "info" button on each applicable RockAuto.com part.

http://www.rockauto.com/en/moreinfo.php?pk=3386592&cc=1303322&jsn=15

Alternate/OEM Part Number(s): 25645089, 25645090, 25733087, 25954973, 25954974, 25954975

LARRY70GS wrote:

http://www.rockauto.com/en/moreinfo.php?pk=3386592&cc=1303322&jsn=15

Alternate/OEM Part Number(s): 25645089, 25645090, 25733087, 25954973, 25954974, 25954975

Thanks Larry!

What I did not say before was telling which GM part number is which can be an issue when a replacement part supplier thinks they are covering several SKUs.  For instance, several replacement part suppliers claim to make replacement coils for the 1996-9 3800 Series II SC engine -- but truthfully only the GM coils and the aftermarket Taylor (and I think one other, Accel or some such) put out the full correct spark.  You can tell by measuring the primaries and secondaries with an ohmmeter and comparing to any good OE coil.

Sometimes the GM part numbers for something like this mean something - like a higher durometer rubber bushing in the end of the arm.  Sometimes they only mean "left" and "right" and there is no physical difference, it was just that GM wanted to track how many lefts and rights were sold.

You might be able to puzzle out which sku is which by putting them all, one-by-one, into the sku search tool on gmpartsdirect.com or another GM dealer parts site and see what the site tells you the part is.  In this case, you'll see that the GM numbers show what looks like the same part, at different prices, for different applications.  Why, I dunno.   I can say that I noticed this arm became unavailable when my Riv turned 10, we even talked about having them fabricated.  I think Robotennis had a good fab for them.  However, they then popped back up again a few years later, and now are not hard to get in the aftermarket.  

Go figure.

In this case, I'd consider getting the aftermarket links (Dorman 905511) and be done with it, because they come with tie rod ends that are needed to connect to the rear control arms.