[RayVoy]

Check the bulbs before you worry about the flaaher

 

[j cat]

you say the left signal flash is faster .. so you have to remove those bulbs and see if the pins/socket connectors are corroded... the flash module will not cause the left side only a hi speed flash..
possible wiring problem .short issue ..

 

[RayVoy]

J cat, I'm still waiting for him to check for a burnt out bulb.

 

[Cap'n Jack]

Lol. Your 2009 truck must be a lot more hi tech than mine from the last century. I’ll be interested in how your problem is resolved.