from what ive seen? painless is a pain in the rear.
X2
Wire marking too small to read without a microscope (for those over 40)
Color coding is not quite GM for their GM products.
Is a real nuisance when you know a particular circuit should be one color---but is another.
Case in point-----GM used a black wire and white wire for the early car's dome lamps.
Later they switched to orange and white.
WHITE is always the circuit ground-----the orange is battery fused, or in the older cars, black is battery fused.
Painless in their infinite wisdom, decided to use black and white, but black is the ground and white is hot.
Kinda screwed with me while I was wiring two different GM products
with different owner supplied wiring kits.