This may be a long shot but I just developed an issue with the above Duramax. I am currently in the Seattle area and everybody is closed.Truck has been perfect until today, has 70000 miles on it. Just traveled from CO 2 weeks ago.Driving today and st...
Just an update, took the truck to a GM dealer in Sumner after 2 independent shops did not want to even look at it and another said they were "stumped".Dealer said I need a TCM.
I had batteries disconnected overnight, reconnected this morning and started truck. Everything normal with the exception of CEL. Drove to auto parts store to get codes read and new batteries.Codes are p0880 TCM power input signal, u0140 lost communic...
Lantley wrote:isaacd wrote:Just disconnected both batteries, test each. Each one read 12.7 volts.Are you just measuring voltage or load testing?Just measured voltage, can an auto parts store measure load?
blt2ski wrote:Where about in seattle are you?Just because the batteries read 12.7 with no load, does not mean with a load they will not get too low or equal. MartyI'm in Orting near Puyallup
