TDG Mafia # 81
Join Date: Jan 2009
Location: Fort Wayne, IN
Thanked 26 Times in 24 Posts
More than likely you have air in the cooling system and a pocket is trapped in the heater core. Thats what was happening to my heater when my headgaskets let go in my truck. Hope they get you back on the road soon.
2001 GMC 2500HD EC/LB, 4X4. A few go fast goodies. 540hp/1107tq Danville Dyno 11/09, Kennedy 40% injectors.
05 IH 9400i with Cummins ISX pulling a lumber bunk trailer, stuck in a swamp somewhere in Indiana.
Proud Veteran Served 6yrs Active Army From Germany, Kuwait and Bosnia to Ft. Hood and Ft. Knox