Do yourself a favor and take your diesel to Brent and team at North Valley Diesel & Auto.
I had the fast blinking Theft light of death issue and all typical recommended typical methods to re-sync were failing.
Brent and team quickly tracked down the issue and -luckily for me - were able to apply a simple fix by repairing a damaged fuse seating.
How many other shops would have tried to throw parts at the issue? Communication and customer service was excellent throughout. Honest and great prices.
I drive a fully bullet proofed 2005 Excursion Eddie Bauer 6.0L with 61K original miles.