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Chevy Forum: 2010 Silverado - Electrical/Computer problem
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  #1  
Old 12-08-2017, 11:19 PM
servaess servaess is offline
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Default 2010 Silverado - Electrical/Computer problem

Yesterday when I started my truck, the Check Engine light came on, and the DIC gave the "Service Stabilitrak" warning. As I drove down the road, the instrument panel (speed & tach) were bouncing around erratically, and the transmission wouldn't shift out of 1st gear. I turned off then back on and the errors remained. I read the ODB errors and had all of the following: U0100, P069E, P0700, U0073, U0101, U0102, U0109. I reset the codes and the truck started and operated normally. I had a meeting to get to so I continued down the road hoping the issue was over.

After my meeting, I started my truck again, and it was in worse shape. This time, the instrument cluster needles all stayed at the "dead" position, I got two new warnings (Service AWD, and Service Traction Control), and the ODB reader gave a "No Link" code when I tried to read the codes (which also meant I couldn't reset the codes). I had to unplug the battery to get them to reset. It again operated properly to get me home.

I researched all the codes from above and basically it seems that 5 different computers from under the hood are not talking to each other. I'm afraid I'm getting into a pricey "Easter Egg Hunt" to find which computer to replace. Can anybody help me with where to start?
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Old 12-09-2017, 02:36 PM
zora zora is offline
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Default Re: 2010 Silverado - Electrical/Computer problem

did you check whether you blew the fuse for the OBD circuit, it usually is the same circuit as the cigarette/accessory socket?
blown fuse could also accout for all those other codes.
check fuses and replace clear codes and see if anything comes back
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Old 12-17-2017, 08:06 AM
servaess servaess is offline
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Default Re: 2010 Silverado - Electrical/Computer problem

I checked the fuse - it wasn't blown.

I had the error again after 4 days, and wrote down the codes this time - here's what they were:
P069E Fuel Pump Control Module error
P0700 Transmission Control System malfunction
U0073 Control Module Communications OFF
U0100 Engine / Power train Control Module (ECM/PCM) comms lost
U0101 Transmissionn Control Module comms lost
U0102 Transfer Case Control Module comms lost
U0109 Fuel Pump Control Module comms lost

The most recent one (yesterday morning) only gave 2 errors (P069E and U0073).

This is quite a slow issue, as it works fine for 4-5 days, then has one "hiccup"!
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Old 12-17-2017, 10:53 AM
zora zora is offline
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Default Re: 2010 Silverado - Electrical/Computer problem

there are 645 technical service bulletins issued on your year vehicle. It is guite possible one or more may have information on your problem. it could be related to a junction block and I would not start replacing parts. A dealer may be your best resource to get to the actual cause of all those codes.
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