1972 K20 rear leaf springs - The 1947 - Present Chevrolet & GMC Truck Message Board Network

lutjanid · 01-22-2019, 06:31 PM

Is this a factory spring setup? I haven't seen other helper spring packs like this and I can't find any mention of them on any replacement spring websites. I suspect this was added by PO. Does anybody else have this setup on 72 K20? Also, the main spring pack is 6 leaves, but all the replacements seem to say it should be 5 or 7 leaves. This truck has the 1G5010 heavy rear spring option on the spid. Thanks.

Bigdav160 · 01-22-2019, 06:39 PM

I think that is the G60 option for leaf springs.

The coil spring G60 option uses a quarter leafs mounted behind the axle.

Bigdav160 · 01-22-2019, 06:41 PM

Here we go

lutjanid · 01-22-2019, 07:10 PM

Thanks for that. The PO must have changed it out since the SPID lists G50. I guess I'll just need to match springs for replacements, because I can't find the auxiliary springs listed on anybody's site, only the main pack.

KY_GMC · 01-22-2019, 09:43 PM

My 72 GMC 1500 2WD had the G50 option that looks like yours. To me, it was a factory installation option. Your looks like the same style that mine was.

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01-22-2019, 06:31 PM	#1
lutjanid Registered User Join Date: Nov 2015 Location: Granbury, TX Posts: 23	1972 K20 rear leaf springs Is this a factory spring setup? I haven't seen other helper spring packs like this and I can't find any mention of them on any replacement spring websites. I suspect this was added by PO. Does anybody else have this setup on 72 K20? Also, the main spring pack is 6 leaves, but all the replacements seem to say it should be 5 or 7 leaves. This truck has the 1G5010 heavy rear spring option on the spid. Thanks. Attached Images

01-22-2019, 06:39 PM	#2
Bigdav160 Registered User Join Date: Apr 2011 Location: Klein Texas Posts: 3,852	Re: 1972 K20 rear leaf springs I think that is the G60 option for leaf springs. The coil spring G60 option uses a quarter leafs mounted behind the axle. __________________ My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe

01-22-2019, 06:41 PM	#3
Bigdav160 Registered User Join Date: Apr 2011 Location: Klein Texas Posts: 3,852	Re: 1972 K20 rear leaf springs Here we go __________________ My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe

01-22-2019, 07:10 PM	#4
lutjanid Registered User Join Date: Nov 2015 Location: Granbury, TX Posts: 23	Re: 1972 K20 rear leaf springs Thanks for that. The PO must have changed it out since the SPID lists G50. I guess I'll just need to match springs for replacements, because I can't find the auxiliary springs listed on anybody's site, only the main pack.

01-22-2019, 09:43 PM	#5
KY_GMC Registered User Join Date: Dec 2012 Location: Fort Thomas, KY Posts: 290	Re: 1972 K20 rear leaf springs My 72 GMC 1500 2WD had the G50 option that looks like yours. To me, it was a factory installation option. Your looks like the same style that mine was. __________________ 1972 GMC 1500 Super Custom, 383 Stoker, TH350 Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=592157 Engine Thread http://67-72chevytrucks.com/vboard/s...d.php?t=592233

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