Chevy cobalt turn signal

change the front bulb

Buy a two pack of turn signal bulbs. Change the front and rear left bulbs and try it out. If you're lucky, you're done and got away cheap. If not, start chasing electrons. Not an overly complicated circuit, the signal is quick flashing because you have an inoperative lamp.

Have you tested the bulbs?

check your fuse and flasher if it is not them then you are doing some wiring

Check you bulbs first because a bad bulb will cause this also !

Replace the turn signal swuitch..

That has nothing to do with the fuse, Check for loose wires at the connecting plug to the bulb, Or try a different bulb,

It is as simple as your hazzard switch needs to be replaced yes your hazzard switch as now turn signals are built threw the hazzard switch my PT Cruiser had same problem as my s10 replaced hazzard switch fixed the problem

No - headlight ok.
The reason that the Right turn signal blinks fast is that there is half the normal load (resistance)
on the right side, since the Right front turn signal isn't working.
Since you replaced the Right front turn signal bulb, your problem lies in the bulb socket or
the wiring to the socket.
(1) try cleaning out the socket - there's probably a contact problem in the socket. You
may need to squeeze the contacts together to provide good contact to the socket contact.
(2) if contacts inside the socket are ok, try back-probing the socket - to make sure that the
socket is getting 12V DC to light the bulb. Replacing a bulb socket is easy, and commonly done.
Any auto parts dtore should be able to sell you a new socket - its just a matter of cutting out the
old one, and then splicing in the new one. Most shops will use small wire nuts, buried under several
wraps of E-tape (electrical tape).
(3) if bulb AND socket ok, you have the worst problem known to man - a wiring fault. In this case,
you'll want to run a new wire from the flasher module (under the dashboard) to the turn signal.

There is a plastic piece inside the steering column that will automatically turn the turn signals off when the steering wheel is turned back to 'straight ahead'. This plastic piece can break, and if it does, they can only be turned off manually, as you are doing. I have not worked on anything as new as your cobalt to repair this, but on older cars it involves removing the steering wheel and turn signal assembly. You must also deal with the air bag. Don't attempt this repair unless you have a manual to follow to disarm the air bag and properly remove the steering wheel and other components.