Coolant pressure cap
Mynyrd1,
Look at the DP Information resource page (the list under the picture of the white truck when you are logging onto the DP). One of the subjects is Duramax head gasket failure. In that article Jim talks about problems with the coolant filler cap causing symptoms much like you described. My truck runs great but uses about a quart of coolant each year. It also likes the coolant level to be just above the low mark on the coolant tank when it is hot. Additionally, it holds pressure in the coolant system over night, even with a new pressure cap. ?????
John
*2006 Chevy, 3500, 4X4, DRW, (LBZ) D/A, CC, LT, 252K Miles, 19.5" Wheels, Mag Hytec Transmission Pan and Differential Cover, SS Grill Guard, Racor 2 micron aux fuel filter, 100 Gallon Aux Fuel Tank, using Edge Evolution, Predator Diablosport, Kennedy ECM tune, Fitch Fuel Catalyst.
*2006 Four Winds, Dutchman, 36', RV, D/A, 5500 Kodiak.
*1993 Harley Davidson, Turbo charged, Springer Softail.
*2007 Pontiac Solstice.
*2005 Jeep, Liberty, CRD (diesel).
*Full-timing in USA, see America first.
BUY AMERICAN or CANADIAN, NOTHING from CHINA .