Reply To: Total ignition shut down – 5.3 V12

Alex Finlay

Almost certainly the ignition module (small black box mounted on top of the left hand inlet manifold at rear). Pouring cold water on it can help revive it a bit quicker but they also often just fail completely. The module inside can be replaced separately (actually a GM part). Kirby Palm’s book has a big section on it. I’ve done two in my car over 10 years, last time was about 6 years ago but the one before that only lasted about 18 months. I carry a spare box in the car for that reason.