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Q:

on my dashboard my parking light and an ! mark are blinking simtaneously on 1991 GMC Sonoma

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
they blink 9 times at the same time 8 half second blinks and 1 full second blink what does this mean
(1) Answer
The blinking brake warning light on your 1991 GMC Sonoma indicates the ABS module is in a failure mode. The module should be mounded to the side of the master cylinder. With the ignition off, try disconnecting both of the module's electrical connectors for 30 seconds and see if the light resets.