Jim Carter's pictures are of a repainted truck so are of limited use.
Here is a picture of one of my trucks in which the firewall is visible. The truck had never been repainted.
Fire Wall 1 Here is a much better picture of a truck owned by someone else:
Fire Wall 2 I have many more firewall pictures if you are interested.
FWIW, GMC trucks of the same area had body color firewalls - but not Chevy.
