[profalcon]

I'm thinking of changing my stock mirrors for the ones with the signal and puddle lamps and maybe powerfold. Will my truck have the harnesses to plug in with the new mirrors. And if I get powerfold how would that work with my stock doorpanel switches.

 

[GR2017]

Not likely the extra wiring would be in the vehicle. Checking your owner's manual will instruct how the OEM folding mirrors are controlled.

 

[esox07]

I believe on the NNBS trucks, most would support the blinker and maybe puddle lights, but likely you would need special wiring for the power fold option.

 

[ferraiolo1]

OP has a 2016 not a NNBS.
And this should help you out

http://www.gm-trucks.com/forums/topic/1 ... r-upgrade/

 

[esox07]

OP has a 2016 not a NNBS.

Yes, I realize that. That is why specified NNBS. That is the best info I had to offer the OP.