What did you do to your NNBS GMT900 Tahoe/Yukon Today?

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CMoore711

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Man, those old front swaybar bushings were toast after a year.

View attachment 457040

I need to do this…. But my front swaybar mount hardware is seized up pretty good. I’m so nervous I’m going to break the bolt head right off.

I was able to swap the rear swaybar bushing mounts just fine.

If a front bolt head strips off and turns into a much more involved maintenance I’d feel better about it if I was upgrading to some Hellwigs.

Any recommendations on techniques to get seized front swaybar mount hardware loosened up?
 

Charlie207

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I need to do this…. But my front swaybar mount hardware is seized up pretty good. I’m so nervous I’m going to break the bolt head right off.

I was able to swap the rear swaybar bushing mounts just fine.

If a front bolt head strips off and turns into a much more involved maintenance I’d feel better about it if I was upgrading to some Hellwigs.

Any recommendations on techniques to get seized front swaybar mount hardware loosened up?

Heat, heat, and heat. That area is a rust-trap for the bolt threads that point up. I soaked them in so much PB Blaster, and one of them still broke. It had probably been fused for years.

At least you'll have good practice drilling....

Actually, stock up on quality left-hand drill bits now.
 

89Suburban

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I need to do this…. But my front swaybar mount hardware is seized up pretty good. I’m so nervous I’m going to break the bolt head right off.

I was able to swap the rear swaybar bushing mounts just fine.

If a front bolt head strips off and turns into a much more involved maintenance I’d feel better about it if I was upgrading to some Hellwigs.

Any recommendations on techniques to get seized front swaybar mount hardware loosened up?

Heat, heat, and heat. That area is a rust-trap for the bolt threads that point up. I soaked them in so much PB Blaster, and one of them still broke. It had probably been fused for years.

At least you'll have good practice drilling....

Actually, stock up on quality left-hand drill bits now.

Presoak them up real good for a while, heat cycle them, sometimes trying to tighten them a crack before loosening helps. Use an adjustable torque impact gun to hammer away at them some in both directions.

I highly recommend one of these sockets to at least keep the head from rounding off. Even still I had 1 of the 4 snap off and had to drill it out half arsed. Put a nut an washer on the top side.


 
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Charlie207

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Don't worry, the fire extinguisher will protect my face from the explosion.

mliBfeV.jpg

cHrHZhs.jpg
 

Charlie207

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At the shop for a courtesy 90-day alignment check. They needed to straighten the steering wheel, but it was perfect timing after replacing the strut mounts, and all that jazz. I serious doubt tearing the fronthend apart affected anything, free is free.

Here's the after-action report. Seems like a lot changed from just a couple months.

O9Q7IzG.jpg
 
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Charlie207

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Man, those old front swaybar bushings were toast after a year.

View attachment 457040

On reflection, does anyone know the torque spec. for the inboard swaybar clamps off the top of their head. It looks like I had them too tight.

EDIT: Oh yeah... Should be 37 ft-lb on the shells, and 17 ft-lb on the end links. I bet I had 59 ugga-duggas on those.
 

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