Thanks Dave For The Advice- I Believe The Problem Was Contacts Sticking In My Turn Signal /hazard Flasher. Replaced It - So Far So Good . Ive Neber Really Heard Of This For A Blowing Fuse Concern But Like You Said Anything Is Possible. Sorry This Is So Long In Returning I Went Down To Montans For A Small Vacation - Truck Ran Great All The Way.mobil One Oil For 19.99 For Five Quarts . Cdn Equivalent Probably 44+ Dollars. Thanks Again . If You Ever Need G.m. Help I'm Here. Murray A.k.a Mr. Big !