They tend to grow over time, especially when it gets very cold or hot. It does depend on the type of chip too. I have a couple on mine that have not grown in the past six months. I am hoping they will become a long enough crack that I can call my insurance company for windshield replacement. The windshield is pitted pretty bad and I would like a new one.
If you get it sealed, that will usually keep it from developing a crack. Many insurance companies have no deductible if you have the sealing done by a professional.
2002 FX4 Bright Red Supercab 4.0 SOHC, manual 5-spd & Tcase, 33" BFG MTs, K&N air filter, Modified air box inlet, Gibson SS cat. back exhaust, Bama flash, Hidden Hitch round receiver, Rear helper air springs, Electric trailer brake controller, Line-X bed liner, WAAG bar with KC lights and Wildernest shell.