Cold Ticking...

Just recently I got a ticking noise on my 1992 c/k 1500, 4.3L V6.

Goes away when the engine gets warm. I have no idea where it is coming from.

Once the ticking goes away runs fine...but I have no idea why it started or what caused it.

Any ideas?

Typically, a ticking noise when cold is an exhaust leak. As the manifold warms up and expands, the leak goes away. Could be a broken bolt, bad gasket or cracked manifold.

//2000CAYukon

Could also be the lifters or -gulp- piston slap.

Could be exhaust, but my first suspect would be a sticking lifter. Run some engine flush and then change oil. That may cure it.