MrBakerTN

Continuing on what Smitty454 wrote, did that help? As a small time used car dealer I've owned a number of these trucks but, this is a 1st. I will add, I remember a very similar smell coming from cars of the 80s and 90s. Especially if it was something that sat in the bright sun most of its life, closed up for extended periods of time. Usually the headliners were sagging significantly and i usually attributed it to that. Did the firewall insulation removal resolve the smell? I was thinking it might be the foam in the headliner and was about to venture into doing a new headliner. This is my personal driver, hate to get rid if it just because I can't stand the smell.