Good morning,
Is the master cylinder full? Make sure the fluid level is correct.
This could be either a bad master cylinder of a brake fluid leak. Did you check under the truck for any leak?
https://www.2carpros.com/articles/brake-pedal-goes-to-the-floor
You could try bleeding the system and see if there is any air in the system but if there is, it comes from somewhere.
https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system
Most likey, the master cylinder is the issue and must be replaced. Then the system will have to be flushed and bled out with a pressure bleeder.
https://www.2carpros.com/articles/how-to-replace-a-brake-master-cylinder
The ABS light may be on due to this issue but there is a fault code stored in the system for the ABS system. I need this code to narrow that area of failure. A parts store will read it for free for you. Let me know the code and I can help a lot more.
https://www.2carpros.com/articles/abs-warning-light-on-easy-repair-guide
Roy
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Wednesday, March 10th, 2021 AT 11:00 AM
