Z71 from CO!

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BlackBrud

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Hello!

I've been lurking for a bit, and finally picked up a new-to-me Suburban last week.

Here's my specs:
2019 Chevy Suburban LT
Z71 midnight package
Luxury package
5.3
88k miles

It seems to have been taken care of - two owners and regular servicing. It took me a while to find a 2015+ Z71 close to me and at the right price, so when I found this one, I jumped on it. Drove down the next day, and drove back home in the new burb. Its crazy how comfortable they are, and I was surprised to get 20mpg on the way home.

I've already ordered a new set of 275/70/18 Nokian all terrain tires, as well as a few things for the interior.

I believe the suspension is original, so I'm also looking into ordering some replacement struts and shocks, but I'm struggling to find the right information to satisfy my curiosity (yes I've used the search on this and other sites). I'm probably going to replace all four with Rancho shocks to stay close to stock and on a budget. The adjustable quicklift front struts and the adjustable rear shocks should be bolt-on replacements, right? I can't seem to find anyone who has replaced Z71 front struts with rancho quicklifts to figure out if it provides 2" of lift over all trims, or if its only an inch or so longer than z71 struts-- can anyone tell me if they've installed rancho quicklifts on a z71 and whether it leveled the front, or kept it stock?

I don't want it to turn into a suspension thread, I just figured maybe someone out there knows..

Back to the intro --

I bought the 'burb to replace a Subaru wagon. It was a great car, but we needed more. More cargo room, more passenger space, more power, more built-in capability. I also wanted something that was common and serviceable so we could keep it going for a long time. My wife and I plan to take this on many road trips and camping adventures in the years to come.

My current plans are to refresh the suspension, get it up to date on the high-mileage service (brakes, trans, diffs, t-case, plugs/wires, etc..), then enjoy it. I've heard a lot about black bear and superchips on this forum, so I may tune it, but I'm not sure about that yet since Colorado has been enacting stricter emissions requirements. I'll try to make a build thread soon to track and share my progress.

Lastly, I just want to thank everyone on here who contributes - I've read so many threads in the last month, and I'm really grateful for everyone sharing their knowledge!

burb1.jpg
burb2.jpg
 
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Joseph Garcia

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Welcome to the Forum from NH.

As you have already seen, there are lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Very nice find!
 
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BlackBrud

BlackBrud

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Welcome to the forum from Oregon.

How many miles on it? Why does it need suspension work already?
Thanks! It has 88k miles. The suspension is just a bit soft and low for my taste. The burb will see some Colorado trails 3-4 times per year as well as some rural dirt roads, so I’d like to beef it up a bit.
 
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BlackBrud

BlackBrud

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Welcome neighbor from Brighton, CO!

As for the shocks.. The big things you have to watch out of is Magnaride, and Air Ride. Replacing them incorrectly means annoying lights on the dash.
Thanks for the heads up! How can I tell if I have magnaride or air suspension? I assume there would be wires coming out of the shock bodies?
 

OR VietVet

GMT800 2005 Tahoe Z71
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Nice truck.

I don't know which RPO is which, but if you get the codes out of your glovebox (the little sticker with lots of 3-digit codes), others can confirm which you have.

-bZj
I am not sure, but I think the RPO codes are not in the glove box on the newer trucks. I thought someone said that here at one time.
 
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BlackBrud

BlackBrud

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Post up a pic of the RPO sticker and someone will enlighten us.
Interesting - it looks like starting in 2018 they now put the top sticker on the driver’s side b pillar.

Also now it has a QR code that, when read, outputs your vin, year, and codes.

Here’s what came up for mine:
2019,CK15906,11,18,06,WKHPX3, AG2 AN3 ARL AXP AYQ CF5 CJ4 C6H DD8 DL3 EF7 FE9 FHO GBA GU6 G80 H2U IO5 I19 JD9 KG4 L83 MAH MYC NP5 NTB RBX RC4 REG RUF TC2 UDD UQA U2K V8D WMK X88 Z71 Z82 1LT 4AA 6ZK 7US 8X2 9X2,8555,
 
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BlackBrud

BlackBrud

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Interesting - it looks like starting in 2018 they now put the top sticker on the driver’s side b pillar.

Also now it has a QR code that, when read, outputs your vin, year, and codes.

Here’s what came up for mine:
2019,CK15906,11,18,06,WKHPX3, AG2 AN3 ARL AXP AYQ CF5 CJ4 C6H DD8 DL3 EF7 FE9 FHO GBA GU6 G80 H2U IO5 I19 JD9 KG4 L83 MAH MYC NP5 NTB RBX RC4 REG RUF TC2 UDD UQA U2K V8D WMK X88 Z71 Z82 1LT 4AA 6ZK 7US 8X2 9X2,8555,
I just went through all of the codes, and though I'm 99% sure I just have z71 suspension, there's 1% that confuses me.

Here's the z71 code:
Z71 - Off-Road Package, includes Z71 Suspension, Z71 specific skid plates, Z71-specific (RCV) 18" wheels, (RBX) 18" all-terrain tires, Z71-specific grille design, (T3U) fog lamps, (BVV) Black tubular assist steps, (UD5) front and rear parking assist, (V76) black recovery hooks, Z71-specific front sill plates, (GU6) rear axle, (NQH) transfer case, Z71-specific rubber floor mats with logo, decal on cluster, badge on pillar and liftgate, (JHD) Hill decent control and (K47) High capacity air cleaner 1 - 4WD models only. Not available with (PDR) LT Signature Package or with any LPO wheels.

But then there are these codes near the end that confused me:
6ZK:
- COMPONENT FRT LH COMPUTER SEL SUSP (6ZK)
7US:
- COMPONENT FRT RH COMPUTER SEL SUP (7US)
8X2:
- COMPONENT RR LH NON-COMPUTER SEL SUSP
9X2:
- COMPONENT RR RH NON-COMPUTER SEL SUSP

Its just weird that they have front "computer sel susp" in the front only? But before that, the z71 code specifically says includes z71 suspension.

Can anyone decipher it for me?
 
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BlackBrud

BlackBrud

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I appreciate the warm welcome!
If anyone is interested, I started a build thread to track updates and share info:
 

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