2003 GMC SIERRA 1500 P1516 code solved????

Trying to figure out what is causing my loss of power and P1516 code, If this doesn't fix it I will make another video. It's over 90 degrees and i just unloaded a trailer full of bark and stuff from the tree and I'm tired.

[@d.j.9961]

It is very important to keep the throttle body clean along with the MAF sensor (mass air flow).

[@d.j.9961]

I got a reduced power indication on my dash & the car (07 Pontiac G5 2.2ltr eco-tec) has been well taken care of mechanically however, forbthe last year or so, I haven't had any issues since a alternator failure a year or so ago. I started the car the night b4 Christmas Eve & it was Very cold prob 0° to 10° with a minus 20° windchill. Had to pry the doors open/frozen shut. Didn't wait for it to warm up but for a minute or 2, drove about 1 mile away, & i reved the car a bit b4 shutting it off & going into a store but, when I left, it did not crank the 1st try but, it started unwillingly on the second try but started missing & that's when I got the reduced power message. I am wondering If I just need to clean the throttle body? I changed 2 of the 3 motor mounts several months ago & I wonder if maybe it's causing the motor to pull one way or another stressing any ground wires. If I am being real honest, whenbi purchased a new alternator from a Auto Z place, when the car idles, it seems as if the voltage is dropping a bit to much as if the pulley size is off a bit?

[@jayfam0916-xo3lq]

Did it fix the problem for good?

[@jessetruman5788]

Did that fix it. Did you have any other issues after driving it more

[@drivewaygarage1561]

I ended up selling the truck but that seemed to take care of it

[@d.j.9961]

The guy you mentioned, Was it Ivan?

[@drivewaygarage1561]

Yup