BigFrizDog

Thanks for the suggestions guys, now I need to find time to trouble shoot

05 Granite Tri axle MP7 Allison Auto The temp inside my cab down by my calves gets up to 120° !!! It seems worse when the windows are down. I guess it's pulling in air from the engine bay, I don't see any visible openings though. There isn't any insulation under the cab either, don't know if there is supposed to be or not. A/C blows cool, pretty sure it has a leak somewhere just haven't found any oil stains. I also think the hoses in the dash might not be connected properly, blower motor blows loud/high but it feels like its on medium coming out of the vents. Any help /suggestions!?! Thanks, Chad

First truck! First time driving one! Bought it in VA and drove home to New Orleans last week. Just bought an 05 Granite with the Alison 6 speed, 16' dump box. Got about 6mpg running about 75mph. I have some questions, not really sure how to properly use the jake brake, should the engine rev automatically when I switch on the pto, the turn signal stalk has a button on the end that I can't figure out what it does, the ac blows cold but not hard. Any advice on any of this is appreciated!