Rear turn signal bulb burnt out

Change the bulb, as a matter of fact they're probably both the same age so change both sides. I hope this helps. Take care.

Replace the bulb

Check bulbs first by switching same bulb from other side of vehicle

The circuit board needs to be replaced. Which is the board that the bulbs sit in. If you remove the turn signal bulb. You will notice the bulb socket will be slightly burnt inside. I had the same problem with my 99 Denali and replaced the circuit board for $35.00. Now everything is fine.

try replacing the bulbs and put some electical grease on them before putting them in, could have condensation on them.

What that rapid turn signal on the dash means is, the rear turn signal tail light is burnt out. This is how you know the bulb is bad. Replace the burnt out tail light bulb and you will be back to normal.

the fuse is broke

Change the left rear turn signal light bulb. It is probably burnt out! The fast blinking flasher is the clue you have a blown bulb.

What may have happened is either the headlights wiring or the parking lights wiring somewhere along the wiring fused to the left turn signals wiring. Depending on if the turn signals go on when you put the parking lights on or the headlights on.

If the signals come on when you turn on the headlights than you only need to locate the light green wire that comes off the left turn signal harness.

Next follow that wire the entire way back to the firewall looking for another wire fused to that wire as you go.

If there are no signs of this you need to continue looking on the other side of the firewall all the way back to the turn signal and hazard flasher unit which is a black box that connects to a black harness located next to a grey harness behind the knee bolster.

But if the signals come on when you turn on the parking lights than you will also need to check the wiring from the rear left signal and follow that light green wire all the way back to the turn signal and hazard flasher unit.

This should fix your problem, but if not than your problem may lay within the the wiring between the turn signal/hazard switches and the turn signal and hazard flasher unit.

Also you may have a burnt circuit in the junction block. This block is where the light green from the rear left signal and front left signal meet. Don't have a description but if you cannot find it let me know and I will go out to the yard and look myself and let you know.

If the passenger side is blinking when you put the signal on, the flasher isn't the problem, as both sides would not operate if the flasher is defective. Did u check the rear bulb? Check the contacts of both the front and rear drivers side, along w/ the bulbs. Clean the contacts w/ fine sandpaper, and coat w/ dielectric grease (available at any parts store), this is specially formulated for elec. systems and will prevent corrosion, which is most likely your problem. Let me know how u do. countrycurt0