Many years ago, I had a vehicle ( can't recall if car or truck )
that had a throttle cable you could pull out of the dash to raise the idle speed just a bit to keep the generator running enough to keep the electrics going while I worked.
Now, I have a 2001 Suburban with the 5.3L ( 350 CC ) engine, with FI of course.
On our trip pulling the Toy Hauler and our two little 75 lb puppies
we had several occasions where we needed to leave the truck running to keep the doggies cool. Temps were in the high 90s at the time. ( we like to visit museums, etc and the doors will lock with a key ) and the dogs don't like strangers
Coming back to the truck, I did not like seeing the temp gauge nudging the Red Line.
Just touching the throttle and bringing the tach up to 1500 rpm brought the temp gauge back down to normal again.
I googled the world, and found 'GRIP' for fleet vehicles to purposely shut the engine down, if left idling more than 5 minutes.
Not what I want.... my son says to use a Popsicle stick under the throttle's perch...
uh, the engine is hot, I can't reach that far, and the throttle is covered with a "cover"
I need to just flip a switch, pull a cable out, something... and pop the hood of course.
my perfect idea is something that plugs into the CAN port and will tell the ECM to up the throttle a bit.