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Thread: '7427 PCM not receiving brake switch input

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  1. 10-31-2021 #14
    tayto
    tayto is offline
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    91 suburban is a squarebody, not gmt400 platform. if you have a vacuum diaphragm near the throttle linkage, then you're other brake switch should have a vac line. I removed a dash and engine harness from a 1990 suburban a few months ago and it had same cruise setup as my 86.
    Last edited by tayto; 10-31-2021 at 06:03 AM.
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