Dash brake light flashing

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Jawzjeep

Honk if parts fall off
Joined
Jun 5, 2021
Posts
621
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1,425
Location
Washington
First Name
Joshua
Truck Year
1991
Truck Model
Suburban
Engine Size
350
My 91 burb just started having the brake light on the dash blink. Long flash followed by 3 short, or 3 short followed by 1 long I don't know which. Drives fine, seems to brake fine.

Did a little bit of research and have some kind of rwal system may be acting up? Anyone familiar?
Same old issue when looking up info that some is for gmt400 because of the year but I'm not sure the systems are the same. Limited info on squares but my google-fu may suck.

Parking brake isn't floppy. Gonna go check fluid. It's miserable outside so not much is gonna get played with right now.
 

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