2004 Tahoe Driver Door Module Troubles

[FunkedOut]

My driver door module (DDM) was acting up for years; heated seats cycling on its own, window switches were intermittent and the power mirror selector quit altogether.
I replaced the DDM about 3 months ago with a Dorman brand unit. Worked like a charm.
Until last week...

A 6 month old Optima Red battery went dead. I could not recharge it with a tender over night. Got it replaced under warranty. They said the battery was totally drained.
When I put the new battery in the truck, all was well, but I noticed that the driver door light would never turn off.
Dome light would turn off, everything about the door being open/closed worked like it should, except for the light on the door.

I replaced the Dorman DDM with a new Dorman DDM. Worked like a charm.
For 3 days. Now the light is on again.

What's the story here?
Anyone got any tips or tricks for me to try?

Thanks in advance.

 

[Big Mama]

Have a look under the driver door sill and the bottom of the B pillar. I had similar problems, though not the light staying on, and found frayed wires.