Engine Mechanical problem
1978 GMC Truck V8 Four Wheel Drive Manual
i have a 79 gmc sierra grand truck 350 v8 my wife drived it from the storage to my house I dunno wat nshe didi but now it does no go in reverse go in all the other gears low to 3rd but not reverse why is that
Was it doing that before you park it? Its very strange that its moving in forward gears but not on reverse excuse me for asking. If this is the case I recommend you have the tranny pressure tested to find out what's really going on.