1971 GMC Trucks There's Nothing Worse Sales Folder. GMC Knows there's nothing worse than a big truck bugged by little things. Here's what our truck people have done to help: 24-Hour Emergency Network. The GMC Quick Delivery Pool. GMC Sudden Service...toll-free. And other features. Condition: You can see where it was torn from the perforation in the magazine. Opens to 30 1/2 by 5 1/2.  Good clean condition. No form no.