Rear Directional Failure warning

[JKeshler23]

My dash alerted me to a rear left directional failure and started flashing faster than normal. However when I get out and check it the light is actually blinking just faster than usual..... What's going on here??

[fondupot]

Check your fuses. That's what they will do when a fuse is bad.

[JKeshler23]

The ones in the panel on the drivers side?

[jay15892]

Sounds like one of front or rear bulbs is bad. Remember there are two in the taillight that act as brake and turn signals and two in the front yellow markers..

[JKeshler23]

The indash display says it's the rear directional

[Bonker]

Bulb out

[JKeshler23]

The bulb still works though....it just flashes real fast

[redwngr]

Compare the lh and rh. Likely one bulb not working.

Fast flash has been a bulb indicator on a gm for years.

[JKeshler23]

It's not the headlight.... It says rear left directional

[redwngr]

Compare the lh and rh. Likely one bulb not working.

Fast flash has been a bulb indicator on a gm for years.

Left hand and right hand rear directional signals

[jimlem]

It's not the headlight.... It says rear left directional

What more do you need? It's telling what's wrong. Why are you trying eliminate every other bulb 1st? It's the left, rear, turn signal bulb. It's even flashing it for you incase you do not know left from right or front from rear. Just change it.

[fondupot]

check the mother effing fuse man. If its not the fuse, its the bulb. Then just replace the bulb. simple

 

check the manual for the fuse location, but its probably the one inside the cab on the driver side

[Nickshu]

I have had other cars w/ this bulb monitoring system. They measure resistance between the bulb filaments left to right. When there is a difference the alert is activated. If one filament is weak, but not burnt out yet, you will get an alert. Always change both left and right bulbs to get the same resistance otherwise the alert can continue even though you installed a new bulb on the bad side.

 

Check the fuse too.

[JKeshler23]

Ok so I changed both rear directional bulbs and checked both of the fuses (which are both good) and it still does it. I also unhooked the battery and reconeccted it. I have no idea what to do now... wtf

[high country]

Is the truck still under warranty?

under 36k miles?