An "Opportunity" has arisen, need you guys thoughts

Remind me someone, What is the proper breakdown for the Tail Lights like which bulbs do which functions, I've got on the Red Truck Top bulbs doing both Brake and Parking but on the Old Trailblazer i've got top bulb as parking/brake on one side and Top Bulb Parking middle bulb brake on the other, Is middle bulb Turn Signal only?
 
Converted the tail lights to LED bulbs, drove multiple times without issue (aside from the hyper flash, which I have ordered the relay to fix), dropped truck off at shop to have Upper Ball Joints, Lower Control Arms, Inner/Outer Tie Rods and Wheel Hubs done, drove to work, then home, parked for a week, drove to town and back home then to town again then decided to test the Cruise Control on the way to work and the second I hit the cruise control the ABS light came on, I know Cruise Control is tied into the Relay under the dash that controls the flashing of the turn signals and all that, would it be the most likely cause of the ABS? Or something to do with the Hubs that just happened to trigger the instant I hit the cruise control after like 30 miles had been put on the hubs?
 
That is weird. Cruise control is tied to the PCM so ??? Unless there just happened to be a fault detected just when you activated cruise. PCM and ABS may be tied together for Stabilitrak and if there's a fault, would let cruise work.
 
You would have to scan for codes when it happens without shutting off the engine to find out.
 

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