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GMC Forum: Left rear turn signal not working
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Old 11-04-2019, 01:48 PM
kfenske kfenske is offline
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Drives a 2003 GMC Yukon XL Denali
 
Join Date: May 2015
Posts: 17
Default Left rear turn signal not working

2003 Yukon XL Denali - This was an odd one to diagnose. After a bunch of troubleshooting and checking all obvious issues: Bulbs, Fuses, Grounds, Flasher Module and Lever assembly I found the issue to be the circuit board located inside the right rear fender area. Removed and found corrosion on two of the pins and inside receptacle plug. Cleaned up the plug, replaced board with new and all is well again.
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