[ljbear]

Go to the parts store and get about 3 feet of 1/4 fuel line. Start the truck, place one end of the hose in or near your ear while moving the other end in the vicinity of the ticking noise. It works as a stethoscope for locating irritating ticks and rattles, and very good for locating exhaust leaks. You can tape a piece of welding rod or coat hanger to the far end to help reach distant areas and to keep your hands away from hot exhaust. I had a nagging rattle in the back of a blazer and could not find it. I used the hose trick and had my wife drive around while I listened until I found the problem. The rear seat bracket was loose, the last thing I would have thought. If you are going to climb under, be safe and make sure to set the brake, and chock the wheels.

Larry