Z71 questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Boog** · 02-12-2011, 10:03 PM

I have the 2000 GMC Z71 excab running 285 tires. I notice the rear has 2" spacers under the springs. Is a 2" lift by chance a factory part of the Z71 package? Just curious.

droppedgmc · 02-13-2011, 11:31 AM

sounds like a 2" level kit. not factory

onebadbowtie · 02-13-2011, 12:11 PM

my 01 had 2 inch blocks from the factory its a z71 also. i think they are stock on all gm full size trucks

droppedgmc · 02-13-2011, 01:05 PM

maybe that came on the z71's only? wait..didn't they have torsion bars unless it was a 2wd

**ybnaford** · 02-13-2011, 02:00 PM

I know it is not a Z71 option because my 04' is not a Z71 and I have them as well. My truck has the trailer package, 3:73's, tranny cooler etc. So maybe it is part of that option to raise the rear up just a little more to compensate for the weight of adding a trailer.

**Boog** · 02-13-2011, 07:44 PM

Mine looks like that. And yes they do have torsion bars. In the front. Easy enough to just crank them up in front to get the 2".
I ask because I have seen other GMC Z71s, even in the brochures, that look to be lifted as well more than the Chevys.
I'm not into lifted trucks or anything. It's just a curiousity and I may want to drop it the 2" sometime, who knows.

droppedgmc · 02-13-2011, 09:40 PM

oh crap...lol...why was I thniking front...That is stock in the rears

67ChevyRedneck · 02-13-2011, 11:31 PM

After seeing the pic I just had to go look... my 00 Z71 has those blocks as well.

Probably a 4wd vs 2wd thing for the chevy trucks (not z71 specific.) If you look at the GMT800 trucks, it's always been pretty clear the 2wd's are lower than the 4wd's.

**Boog** · 02-14-2011, 12:02 AM

Just went out and checked my 97 Burb 4wd. All stock. It does not have those spacer blocks. It does not have the Z71 package either. Maybe the package is the determining factor?
It has been asked numerous times over the years just what makes up a Z71 package. Lots of ideas. We all know it's decals, beefier shocks and skid pan. What else?

biggsteve97 · 02-14-2011, 02:59 PM

Those cast iron blocks are stock on only the 4wd 99-06 GM 1/2 ton trucks. The Z71 package is just 46mm shocks(the standard are 42mm),skid plates(usually metal) behind front bumper and under transmission, and a sticker. They use the same springs and torsion bars. This has not changed since the inception of the Z71 package on the 4wd, there might be a difference when they started using the package on the 2wd a few years ago.

02-12-2011, 10:03 PM	#1
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,535	Z71 questions I have the 2000 GMC Z71 excab running 285 tires. I notice the rear has 2" spacers under the springs. Is a 2" lift by chance a factory part of the Z71 package? Just curious. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

02-13-2011, 11:31 AM	#2
droppedgmc Truck Enthusiast Join Date: Dec 2006 Location: Arlington, WA Posts: 1,346	Re: Z71 questions sounds like a 2" level kit. not factory __________________ '85 swb

02-13-2011, 12:11 PM	#3
onebadbowtie Registered User Join Date: Feb 2010 Location: Parsons, KS Posts: 357	Re: Z71 questions my 01 had 2 inch blocks from the factory its a z71 also. i think they are stock on all gm full size trucks __________________ James 94' Chevy K1500 Extended Cab 4x4 5.7 72' Chevy LWB K10, 350, SM465, NP205 Project "Daily Driver"

02-13-2011, 01:05 PM	#4
droppedgmc Truck Enthusiast Join Date: Dec 2006 Location: Arlington, WA Posts: 1,346	Re: Z71 questions maybe that came on the z71's only? wait..didn't they have torsion bars unless it was a 2wd __________________ '85 swb Last edited by droppedgmc; 02-13-2011 at 01:06 PM.

02-13-2011, 02:00 PM	#5
ybnaford Junior Member Join Date: Mar 2009 Location: Elizabeth, Colorado Posts: 38	Re: Z71 questions I know it is not a Z71 option because my 04' is not a Z71 and I have them as well. My truck has the trailer package, 3:73's, tranny cooler etc. So maybe it is part of that option to raise the rear up just a little more to compensate for the weight of adding a trailer. Attached Images __________________ 04' Silverado 1500 ExtCab, 4x4, SWB - 240,000 & still Going, 62' C10 SWB, Stepside - Ole Green Girl! Last edited by ybnaford; 02-13-2011 at 02:02 PM.

02-13-2011, 07:44 PM	#6
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,535	Re: Z71 questions Mine looks like that. And yes they do have torsion bars. In the front. Easy enough to just crank them up in front to get the 2". I ask because I have seen other GMC Z71s, even in the brochures, that look to be lifted as well more than the Chevys. I'm not into lifted trucks or anything. It's just a curiousity and I may want to drop it the 2" sometime, who knows. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

02-13-2011, 09:40 PM	#7
droppedgmc Truck Enthusiast Join Date: Dec 2006 Location: Arlington, WA Posts: 1,346	Re: Z71 questions oh crap...lol...why was I thniking front...That is stock in the rears __________________ '85 swb

02-13-2011, 11:31 PM	#8
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: Z71 questions After seeing the pic I just had to go look... my 00 Z71 has those blocks as well. Probably a 4wd vs 2wd thing for the chevy trucks (not z71 specific.) If you look at the GMT800 trucks, it's always been pretty clear the 2wd's are lower than the 4wd's. __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! Last edited by 67ChevyRedneck; 02-13-2011 at 11:33 PM.

02-14-2011, 12:02 AM	#9
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,535	Re: Z71 questions Just went out and checked my 97 Burb 4wd. All stock. It does not have those spacer blocks. It does not have the Z71 package either. Maybe the package is the determining factor? It has been asked numerous times over the years just what makes up a Z71 package. Lots of ideas. We all know it's decals, beefier shocks and skid pan. What else? __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

02-14-2011, 02:59 PM	#10
biggsteve97 Registered User Join Date: Jan 2010 Location: Kansas City, Mo Posts: 284	Re: Z71 questions Those cast iron blocks are stock on only the 4wd 99-06 GM 1/2 ton trucks. The Z71 package is just 46mm shocks(the standard are 42mm),skid plates(usually metal) behind front bumper and under transmission, and a sticker. They use the same springs and torsion bars. This has not changed since the inception of the Z71 package on the 4wd, there might be a difference when they started using the package on the 2wd a few years ago.



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