I fear I've committed a big power killing error. I just put a big fiberglas
cap on my diesel pickup, and now I have to downshift when towing over hills
I formerly just cruised up in high gear. AND today the thermostat gauge
crept up for the first time...never did that before even in August. Any
streamlining (or other) remedies besides removing the cap? I was trying to
give myself a small sleeping space, home away from home, since I detest
tents and don't have a trailer with living quarters.