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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 29457
Experience:  GM Grand Master Technician 2007. 14 years experience.
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I am having a problem with my 2008 Chevy Suburban 1500. The

Customer Question

I am having a problem with my 2008 Chevy Suburban 1500. The left turn signal flashing rapidly at dash indicator but not flashing outside.
Submitted: 1 year ago.
Category: Chevy
Expert:  Tim's Auto Repair replied 1 year ago.

Hi, My name is ***** ***** for the delay.

I will do my best to assist you

does the turn signal not work at the front or rear?

Customer: replied 1 year ago.
Front, rear and lights on rear-view mirror all do not work.
Expert:  Tim's Auto Repair replied 1 year ago.

do they not come on at all?

Customer: replied 1 year ago.
The left turn signals (front, mirror and rear) do not light up at all. Right side works normally. When the left turn signal is switched on, the arrow light on the dash blinks once or twice slowly (normal rate); then blinks very fast.
When a trailer is connected, its left turn signal does work but it blinks very quickly.
Expert:  GM Tech (Cam) replied 1 year ago.

Hi there, I am Cam. Sorry for the delay, do you still need help?

Customer: replied 1 year ago.
Well, yes. I never did get an answer.
Expert:  GM Tech (Cam) replied 1 year ago.

OK no problem. I just wanted to make sure. Allow me a minute to pull up a schematic of your system.

Expert:  GM Tech (Cam) replied 1 year ago.

Ok so can I Assume the right works properly? If so, did you check the fuse for left turn stop in the left dash fuse block?

Customer: replied 1 year ago.
the right side works properly. The left side fuse is good. I swapped the left-side and right-side fuses to be sure and the symptoms did not change.
Expert:  GM Tech (Cam) replied 1 year ago.

Ok what happened prior to this issue? Any odd things happening?

Customer: replied 1 year ago.
Well, as a matter of fact, my battery died and was replaced just before this problem appeared.
Expert:  GM Tech (Cam) replied 1 year ago.

Try this reset first. IF not then we need to test the output of the Body Control Module (BCM). Its under the dash, left side. Take the trim panel off at your knees, find the brown connector and in it test pin 4 for power with the signal lights on

Take the battery cables off the battery, hold the ends together for 10 seconds then attach them to the battery and see what happens. This will reset the whole vehicle.
If you have 2 batteries, then remove both and touch only one set.