2019 GMC Sierra AT4

[Brian Starbuck]

For the 4th time in the last year, my AT4 has not started and this time it was not able to be jump started by another vehicle.  It wasn't until a tow truck with a mondo battery came and was able to jump start the vehicle.  I took it to the dealership and they replaced the battery and two weeks later another start failure.  This is currently a warranty issue.  There is apparently a vampire load on the system which is draining the battery.  Any suggestions about tracking down the problem?  Is there a mechanic shop out there that can put a harness on the fuse box and measure the static amp drain of the system?  In Colorado here.  The problem only manifests itself in really cold weather.  

[fastk9dad]

Fairly simple to test for parasitic draw if you have a multimeter, no special tools needed.