A cracked wire in the fusebox that will open when it gets hot. It hasn't been a problem on the '04s
xoxoBruce is right, 03/04 do NOT have OEM broken wire fuse box problem.
And most of 06 are OK. We tried tracking 05 with "cracked" wire by Vin#, didn't work, tried location, didn't work. Random but a problem. NOT ALL 05 have broken wire!
Wire "cracked" during production, actually "broken in half", engine heat expands plastic fuse box, causing "cracked" wire to separate, SHUT DOWN.
In 04, GM decided to change engine, transmission and add 200 times more software to the SSR. From 5.3, regular gas, 300hp to 6.0, high test gas and 400hp. Changed 03/04 PCM (Power Control Module) to 05/06 ECM (Engine Control Module).
05 also had Recall by GM on Fuel Pump which is IN gas tank. Again not all 05 effected.