I have a 2007 chevy avalanche and trying to locate the turn signal relay.. Any help would be greatly appreciated. Thanks Ken. You can call or text 903-288-3585.

Send me a PM. You might be looking in the wrong place or using a slightly off search term. I can help.

Re: Fast flashing signals due to LED lamps ...

Here is the D&O for the turn signals on a 2007 Avalanche.

"When the turn signal switch is placed in either the left or right position, a ground signal is completed from the turn signal switch to the BCM. When the hazard flasher switch is activated, a ground signal is completed from the turn signal/hazard switch to the BCM. The BCM then sends an ON-OFF voltage signal through the fuses to the appropriate turn signal and side repeater (export only) lamps or to all of the turn signal fuses for hazard operation. The driver door switch and passenger door switch also receive voltage from the BCM turn signal supply voltage circuits for the mirror turn signals. The door switches have no function or control of the mirror turn signals other than a pass through connection for the circuits. The audio chime is also activated when the turn signals are ON. The instrument panel cluster (IPC) receives the signals to activate the turn signal indicators over the GMLAN serial data system. When the hazard switch is pressed, all turn signal lamps will flash including both IPC turn indicators. "

No flasher on this model. Need to wire inline resistors to the LEDs to fool the BCM into thinking there are traditional bulbs. LEDs have such little resistance the BCM thinks the filaments are open in the bulbs.