Go In the garage or shed and start your GS 100/PDs and run It up for 3 to 5 minutes and see If the exhaust headers glow red on the left side, or maybe both ?
Cheers.
P.S. leave the door open a bit so you don't die.
oh and leave the lights off during the test.
Cheers.
P.S. leave the door open a bit so you don't die.

oh and leave the lights off during the test.

.