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 Lateral Arm OEM part #s?

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RivieraRyan
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PostSubject: Lateral Arm OEM part #s?   Sun Jul 09, 2017 1:52 pm

I am having difficulty locating the part numbers for the right and left lateral arms on a 98. Any help is much appreciated.
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LARRY70GS
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PostSubject: Re: Lateral Arm OEM part #s?   Sun Jul 09, 2017 2:56 pm

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

_________________
98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
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RivieraRyan
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PostSubject: Re: Lateral Arm OEM part #s?   Sun Jul 09, 2017 7:38 pm

The rearward lateral arms, not the control arms or adjustment links.
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LARRY70GS
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Name : Larry
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PostSubject: Re: Lateral Arm OEM part #s?   Sun Jul 09, 2017 8:57 pm

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

_________________
98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
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RivieraRyan
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Joined : 2008-05-04
Post Count : 101
Merit : 7

PostSubject: Re: Lateral Arm OEM part #s?   Sun Jul 09, 2017 9:40 pm

I think so, but what is the GM part number?
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LARRY70GS
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Name : Larry
Age : 60
Location : Oakland Gardens, NY
Joined : 2007-01-23
Post Count : 1502
Merit : 104

PostSubject: Re: Lateral Arm OEM part #s?   Sun Jul 09, 2017 9:57 pm


_________________
98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
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albertj
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PostSubject: Re: Lateral Arm OEM part #s?   Mon Jul 10, 2017 9:29 am

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.
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LARRY70GS
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Name : Larry
Age : 60
Location : Oakland Gardens, NY
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Post Count : 1502
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PostSubject: Re: Lateral Arm OEM part #s?   Mon Jul 10, 2017 12:25 pm

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

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

_________________
98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
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albertj
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Name :
Location : Finger Lakes of New York State
Joined : 2007-05-31
Post Count : 6696
Merit : 123

PostSubject: Re: Lateral Arm OEM part #s?   Mon Jul 10, 2017 3:03 pm

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.
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