Forged lower control arms for 1998 K1500

[pap-repair]

Hello to All,

First time posting. I am replace the frame on my 1998 K1500 and replacing all the rusted/worn out parts while it is apart. I have a $4000 budget and am well within that number.

My question is exactly which forged lower control arms will fit this model? I have conflicting information, based on Hollander Interchange numbers. It seems the '99 K2500 Pickup/Suburban and the '99 Silverado 2500 pickups are different. Here are the interchange numbers I have found from hollanderparts.com:

512-01592L 1999 K2500 Pickup/Suburban Lower Control Arm, Front Left, Forged (47.89Mm Ball Joint)
512-01591R 1999 K2500 Pickup/Suburban Lower Control Arm, Front Right, Forged (47.89Mm Ball Joint)

512-01215L 1999 Silverado 2500 Lower Control Arm, Front Left
512-01516R 1999 Silverado 2500 Lower Control Arm, Front Right

It appears these forged LCA's will replace the stamped steel arms:
512-01592L - 1996-2000 K2500 Pickup/1996-1999 K2500 Suburban Left LCA
512-01591R - 1996-2000 K2500 Pickup/1996-1999 K2500 Suburban Right LCA

What changed on the 2000 Suburban and 1999 Silverado 2500? I find a lot of these at the local wrecking yards.

Please let me know if I interpret the above correctly.

I am storing my photos @ https://1998k1500framereplacement.shutterfly.com/. I use them for my photobooks, always free, ~$8.00 shipping.

Thanks,
Peter

 

[Steve A]

Hey Pete, what's your status on this forged LCA project? I'm curious because I'm looking to replace stamped LCAs for forged ones and in a sticky on here Brother Al posted pictures of a forged 1500 LCA. That LCA looks suspiciously like a 2000 K2500 LCA listed on RockAuto.

 

[Supercharged111]

I was under the impression that all the LCAs were interchangeable?

 

[skylark]

In 99 the 1500 was redesigned.

The 99-00 2500-3500 trucks, Denali, Escalade, 99 Suburban, Yukon, Tahoe and 00 Tahoe Z71 were all based on the typical 88-98 GMT400 platform.

 

[Supercharged111]

In 99 the 1500 was redesigned.

The 99-00 2500-3500 trucks, Denali, Escalade, 99 Suburban, Yukon, Tahoe and 00 Tahoe Z71 were all based on the typical 88-98 GMT400 platform.

Allow me to restate: I was under the impression all 400 LCAs were interchangeable.

 

[skylark]

Allow me to restate: I was under the impression all 400 LCAs were interchangeable.

I could be wrong but I thought that the 8 lug ones were different from the 6 lug ones.

 

[Supercharged111]

I could be wrong but I thought that the 8 lug ones were different from the 6 lug ones.

I'd like some closure on this as I long believed this to not be true. That said, I know the front track width is substantially different from 6 to 8 lug.

 

[pap-repair]

Hi All,
I purchased some used LCA from completerecyclinggroup in MD fo $60 ea + free shipping. The important thing is the Hollander Interchange #, this way any good recycling yard can find the correct part.

For the forged arms, search for these interchange #'s;

Left LCA = 512-01592L
Right LCA = 512-01591R

The LCA's I received were in excellent condition. I did replace the bushings and the lower ball joint, as I was rebuilding the entire front end. Those part #'s are (I bought these @ Rockauto)
for the forged arms;

Lower Control Arm Front Bushing = ACDelco 45G11076
Lower Control Arm Rear Bushing = ACDelco 45G9213
Lower Ball Joint = Moog K6509

They fit like a glove, and I had no problem aligning the front end. I also replaced the upper arms with Moog parts RK620720, RK620719.

Hope this helps!
Peter

I have finish replacing the frame my pickup. There is NO rust on the cab or box, and I only had 79000 miles on it. This was a lot of work for a retired, bad back SOB, but it saved me over $30k on a new truck. Pictures to follow some day.

View media item 31519

 

[Supercharged111]

You know what I need to do is measure the distance from the LCA bushing where the torsion bar engages the arm. For some reason I have it in my head that 98 6 luggers mount the bar farther inboard for less mechanical advantage. This seems to confirm my belief that the HD arms work on the LD chassis.

 

[Drewskie1992]

Did this actually work? Thinking of going to forged myself. Also found a k2500 6” lift for stupid cheap I want to put in my truck.