2008 Suburban 1500 2wd 5.3 FF 135k miles
Completely shut off on me while driving the other day. I coasted into a parking lot with no power steering. It recranked and died a time or two, so I left it overnight. Then NO CRANK, NO START. Got it towed to my house. These were the codes:
U0100 PCM/ECM Comm Error
P0606 PCM/ECM Comm Error
P0690 Fuel Pump Control Module
C0899 Low Battery (I think this was an old code)
C0242 ABS Sensor

I disconnected the battery and replaced the fuel pump module. Reconnected, cleared and re-ran codes:
U0100 again (ECM)
C0242 again (ABS)
C0040 front right wheel speed sensor
C0035 front left wheel speed sensor - one of these was just replaced but not sure which
Still NO CRANK, NO START. My understanding is that the Stabilitrak/ABS would not prevent the vehicle from starting, so I didn't attack those yet.

I'm not getting the codes that people get for the throttle positioning sensor or the gas pedal frequent issues, so I really don't know what to do next. I'm considering replacing the ECM but am looking for any other ideas.

 

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