Two problems related to ignition module have been reported for the 2001 Chevrolet Suburban. The most recently reported issues are listed below.
Starting about three weeks ago, our 2001 Suburban would "shut down" without warning. It could be re-started. This happened 15 - 20 times during these three weeks. It has been in and out of the dealership during this period and the problem could be replicated at the dealership on occasion. As of now there is no cure and work continues. It's believed to be electrical in nature. To this point, the wiring from the key-switch to the computer has been bypassed, the on-board computer has been replaced, the ignition module has been replaced. The problem persists, with a potentially disastrous out come.
Driving down the highway at 70 mph the vehicle ceased to operate. Luckily we were on a straight-away and able to coast to a stop on the shoulder. However our routes usually take us through the mountains and when the vehicle lost all control,ie; no brakes no steering, at any posted speed limit that could be dangerous. The dealer informs me that the main computer went out. There was absolutely no warning what so ever. The component just failed. The dealer advises me that the replacement part is of the same "grade" no updates for this part exist. This is not a comforting thought.