Turn signal flasher won't flash right or left

flasher/blinker is busted. this is located under your dash board. remove steering column cover, turn on LEFT turn signal (yes, the one that is working), then you will hear a clicking sound. locate the relay that causes the sound. there you can see 2 relays (one for LEFT, other one for RIGHT turn),replace busted one.

The signal wire going to the right front has a splice for the dash indicator, a wire branching off from the turn wire and going to the dash. It sounds like that right signal wire is broken or lost a connection before it splices off to the dash, so the problem sounds like it is under the dash, either coming out of the turn signal switch to the flasher or from the flasher to that splice. You may need a multi-meter to check voltages on that wire at various places under the dash. Ascertain which color wire you need to concentrate on. Check for voltage on it with key on and right blinker on-voltmeter will spike to battery voltage, then fall to zero as the flasher breaks voltage continuously, if checked after the flasher. If checked when leaving the turn switch, it should be a continuous signal on that wire. Think you better find a wiring diagram to find the right wire to check. Good luck.

for the dash lights i would check the fuse...the turn signals not flashing, u need a flasher, usually by the fuse box,most are silver in color.

One of your bulbs is out. Turn your flashers on and walk around your vehicle to see witch one it is and replace it.

This is weird! It seems to me that the left turn signal is getting 12v from somewhere at all times.I don't think the flasher is the problem(most GM systems use a single flasher for left and right)You probably have a crossed wire somewhere(or an add on accessory was connected to the left signal wire,allowing 12 volts to bleed through to the circuit)

First, is it doing it on BOTH isdes or just on one side? Example: turn signnals flash OK when turning left, but only come on and stay on when turning right. If it is doing this, then you most likely have either a blown bulb or a bad bulb socket on the side that is not flashing. You need to check both the FRONT and REAR bulbs to make sure they are all functioning properly.
If it is doing it on BOTH sides, then you either have a bad flasher, or at least 2 bulbs burned out (one or more on each side).

Are you sure you replaced the correct flasher? The flasher for the HAZZARD lights is plugged into the convinience center under the left side of the dash. If this is the flasher you replaced, it is the wrong one.
The turn signal flasher is mounted to the driver's knee bolster bar near the steering column. It is held to the bar with a clip. (see diagram)

Replace the turn signal switch. They can be fixed if your up to it, but you have to disassemble the switch. there are parts that have to go back in the right order. Let me know. The longer you let this go , you will start to lose the headlights. All the outside lights run threw the turn switch.

Change the flasher which is located up by fuse block under dash

You need a turn signal flasher.

For this modle and year the turn signal flasher should be mounted in a clip on the right side of the steering column support bracket. The hazard flasher is located under the instrument panel in the module block, on the right side.
Hope this helps,
Regards,