The 1979 GMC Jimmy is a favorite among off-roaders and collectors alike, but keeping one roadworthy takes work. If you’ve got one, you probably need brake system repairs, fresh engine gaskets, and new weatherstripping to keep it running like new. One thing to check? The rear differential—if yours is whining or clunking, it might be time for a rebuild. And if your brake lines are original, don’t take chances—replace them before you find yourself with a soft pedal at the worst moment. Classic Parts Pro will have all the Jimmy parts you need soon—sign up for the newsletter to stay updated!