Two problems related to ignition have been reported for the 2004 Chevrolet Suburban. The most recently reported issues are listed below.
Speedo does not read correct, it gets stuck at various numbers. . . While driving or parked on or off (speed can be plus or minus actual speed by 5-55 mph at any given time. And you never know when, also the oil pressure gauge will go past the marked limit when the truck is off, no key in the ignition.
Dt: the consumer stated at 22,000 miles she was told there was a computer glitch in the vehicle. When the consumer turned the ignition off, the seat would shoot forward into the steering wheel. The controls for the seat work backwards. The consumer had to push the button forward in order for the seat to go back. She was told by her service dealer that there was a computer glitch in the program. Resetting the seat did not correct the problem. The heated seats came on by themselves.