you need an alternator
Yes, it could.
Yes, the ignition on a trailblazer can cause head lights to work improperly.
engine coolant getting into an engine cylinder from a bad head gasket , cracked or warped head
no the higher milage or higher rpms can cause the head bolts to stretch which would cause it to blow
head lights won't work, no power to them, signal works , reverse lights work
On a 1999 GEO Tracker, a bad fuse can cause the headlights and dash lights to blink. A bad voltage regulator or alternator can also cause lights to blink and flicker.
cracked head or bad gasket
well if its your head lights it maybe your DRL
bad head gasket , warped or cracked head
cause the head lights r one the head of the car, the front and the taillights are on the back of the car also known as the tails