93 K1500 Z71 RCLB

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BonestockK1500

LT265/75/R16
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At tire shop today, shout out to JJs Tires on US 41, only tire shop I know open 7 days a week.

Got my 2000s era spare wheel cleaned and 265 firestone mounted. Finally have a good spare tire again.

The owner has the '71 Mach 1 pretty clean. Also had a 95+ Tahoe on consignment
 

Bowtie_Nation

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Truly the truck that my truck aspires to be, though my addiction to adding unessecary addons will mean it could never be stock again. Great work man, that thing is so clean!
 

BonestockK1500

LT265/75/R16
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Brake warning light on dash is throwing a code for the brake proportion valve. I’m not experiencing any adverse functionality with brakes under the mild conditions that I drive it. But the GM part is discontinued and the AC Delco equivalent part seems to be like hens teeth.

Any thoughts about it, what would you do besides start digging through the You-pull-it for a used replacement? Any secret obsolete part dealers out there I should look into?
The usual suspects are no help (GMC truck dealership, NAPA, Summit, Rock, LMC, Oreilly, Advance Discount, etc..)

ACDelco 172-2040 Brake Proportioning Valve

OEM part number is GM PN 15633165

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