Bed sag

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bretcopsey

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Worst case as with my son’s 96 Sierra that just went to the junkyard-broken frame. His was right in front of the leaf spring mount. I think the circled area in the pic is the final piece to let go that caused the sag.

Could also be a rotted out/missing bushing which should be much simpler to address.
 

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Nad_Yvalhosert

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@OBSMando From your pic, theres more door gap at the bottom than at the top. My '88 looked like that. When I removed the bed, I found the cab in contact with the frame. The answer is: the bed is fine, the cab sheetmetal is buckling and the cab mounts are collapsed.

@bretcopsey And that's the first reason for removing the bed on my '88... to attempt the repair on my frame by the forward leaf mounts. And install a 6" Rough Country lift. And that idea was scrapped last fall.
 
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1989GMCSIERRA

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I was wondering if anyone knew what causes a truck to look like this . Where the bed looks caved in the middle and not straight

Cab mounts on the end of the cab corners or the bed, frame and/or cab have rusted through and are collapsed.
Most likely it’s deteriorated or crushed rubber donuts on the cab mounts if you don’t live in rust country
 

someotherguy

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Cab mounts on the end of the cab corners or the bed, frame and/or cab have rusted through and are collapsed.
Most likely it’s deteriorated or crushed rubber donuts on the cab mounts if you don’t live in rust country
Yeah - if truck isn't from a "rust" area - which doesn't necessarily mean where they salt the roads, could also be from a coastal area where someone drove the truck through a lot of salt water on the beach..

#1 suspect cab mount bushings

#2 and I mean a distant #2 suspect .. bent frame

Richard
 

Caman96

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Yeah - if truck isn't from a "rust" area - which doesn't necessarily mean where they salt the roads, could also be from a coastal area where someone drove the truck through a lot of salt water on the beach..

#1 suspect cab mount bushings

#2 and I mean a distant #2 suspect .. bent frame

Richard
#3 cab mount pictures

#4 frame pictures
 

1989GMCSIERRA

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Yeah - if truck isn't from a "rust" area - which doesn't necessarily mean where they salt the roads, could also be from a coastal area where someone drove the truck through a lot of salt water on the beach..

#1 suspect cab mount bushings

#2 and I mean a distant #2 suspect .. bent frame

Richard
Yeah that’s true. Although there are less and less places where you can drive on the beach. At least out here on the West coast.
 

someotherguy

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Yeah that’s true. Although there are less and less places where you can drive on the beach. At least out here on the West coast.
We still have a few here in SE Texas depending on where you go. Dunno about Orlando where OP is from. :)

(I never drive through the water, hell with that.. just a delicate low-speed trip to where we park and that's it)

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Richard
 
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