I’ve looked around and gm parts direct flat out told me the oem springs were discontinued? Rock auto doesn’t list my specific model so I’m concerned I’m ordering wrong ones I’m wanting to replace both front coil springs when I install my new oem struts and mounting parts. I have the z55 suspension. Any help is appreciated.
Need help w/part# for front coil springs on my 2011 Yukon Denali
- Thread starter Denaliz
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915_Tahoe
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Last 8 of vin#
swathdiver
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Give Rene the last 8 of your VIN and he can look it up easy peasy.
The ACDelco Professional variety (not GM OE) are either 45H0451 for AWD or 45H0452 for RWD. Your RPO sheet has 6XX and 7XX spring codes on it and we can use those to look up the exact GM OE springs as well. For example, if the codes are 6B4 and 7B4, the front coils are 20842469.
Much easier/accurate to have Rene look it up!
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Denaliz
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Thanks guys- this is the 1st part I’ve not been able to find via gmpartsdirect, rock auto, google etc since 2011
6ya,7ya suspension code. Last 8 of vin is BR178000
I believe them to be oem #20842477
And ADO-45H0453 replacement option from ACDelco/ Moog 81254
6ya,7ya suspension code. Last 8 of vin is BR178000
I believe them to be oem #20842477
And ADO-45H0453 replacement option from ACDelco/ Moog 81254
Not that I know your answer, but I noticed you have the Magnaflow exhaust...
Do you happen to know which one?? and how do you like it.. I have headers etc, but
still the oem cat back. Was wondering real world opinion
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Denaliz
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Just my thoughts based on what I’m seeing but I’d love some validation still if you csn help confirm with the info I provided please
swathdiver
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Denaliz
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Those OEM Z55 coil springs are no longer manufactured by GM (Why? Who the heck knows!). I just went through this, and I had a dealer check the dealer inventory nationwide. There were 8 OEM coil springs in dealer inventories nationwide, and only 1 dealer actually had 2 in stock. The dealer price plus the added freight to get them to me, made them a non-starter. I purchased the Moog coil springs at Rock Auto, and so far, they work fine.
How did you determine the Moog spring rates were correct? I'm going through the same issue with the z95 springs. Discontinued, but I don't want to order the wrong aftermarket ones either.
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They were listed as a direct part number replacement for the OEM springs.
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Denaliz
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On a side note I ended up buying all the parts for a complete new coil over strut. With 130k on the clock (I’m original owner but still lot of miles) figured I’d go ahead and buy all new springs, strut mount, bumpers, insulators spring seat and hardware. Wasn’t too bad getting all parts but double check your oem strut mount and spring seat part #’s. The had the wrong spring seat part listed thru gm even with vin search.
Yep, I discovered exactly that, finally found the right seats (without the ribs in the middle). Even the top nut is listed wrong via VIN search. It's too small.
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Denaliz
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Correct they list a m10-1.5” that’s the size that goes on strut mounts and below the top nut on some models.. lots of bad info I found during my process
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I replaced all of the front suspension components as well, including the upper and lower control arms and ball joints. I figured that while I was into it, I might as well replace everything, and then I don't need to worry about it for the next 100k miles.
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Denaliz
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Posting this as it may help someone
If your replacing the strut mounts and it’s GM part# 25940743 (I got mine on Amazon for 22.00 aftermarket part)
the correct and matching spring seat is part# 25940742 or 84061243 (same part)
I had multiple GM part suppliers try to tell me it was #15803177 which does not fit the above strut mount.
Also the correct top nut part# for my 2011 Yukon Denali (Z55 6ya,7ya) is
Gm part# 15815577
Hope that helps others!
If your replacing the strut mounts and it’s GM part# 25940743 (I got mine on Amazon for 22.00 aftermarket part)
the correct and matching spring seat is part# 25940742 or 84061243 (same part)
I had multiple GM part suppliers try to tell me it was #15803177 which does not fit the above strut mount.
Also the correct top nut part# for my 2011 Yukon Denali (Z55 6ya,7ya) is
Gm part# 15815577
Hope that helps others!
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Let us know in about 6-12 months how the top strut mounts from Febest Parts work out.
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Denaliz
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I don’t expect an issue based on inspection- stamped metal part correctly lines up with everything else. Worse case I pay 45 bucks for the ac delco version and flip it out.
If you have experience or something to share just be str8 up so others can hear as well and make their decision.
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