Pontiac Problems? Ask a Mechanic for Answers ASAP
im cam, a licenced diagnostic tech
i ahve seen this a few times on these and some buicks
there is a hdm relay (headlight driver module realy) in the underhood relay fuse box.
swap this relay (#35) with another of the same relay and see if this stops. I will usually use the horn relay as this will also let me know if the horn starts instead of the lights.if it stops flashing than the relay must be replaced
let me know if i can assit you any further!
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