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Serial Data Line malfunction is what I come up with too but there are no other codes stored, no malfunctions and everything seems to be working fine......Got me baffled!
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
It's a communication code ("U" prefix) for which GM specifically says to ignore as long as you are not experiencing any problems with that particular system - IPC in your case.
If you get a "C" suffix you will usually be experiencing some sort of problem, otherwise ignore it.
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by poe400
Thanks, Lucky, Trios and Lonestar.....Im going to ignore it for now!
Tip: take good care of, and be aware of the condition of, the various ground connections on your vehicle. Serious. They are of special importance in helping to minimize these little spurious/false alarm messages from popping up, along with any other problems that can come along with bad/corroded/loose connections.
I have checked all my grounds and the battery for 11ft lbs of torque. This car was exceptionally clean and garage kept...The c102 ground pod was taken apart just to see if mine had any green corrosion/oxidation like so many others have seen (even with low mileage and garage kept too) and my grounds had no corrosion and essentially looked new like the rest of the car. Thanks for the tip, Lonestar as I know these grounds have plagued many!
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by poe400
I have checked all my grounds and the battery for 11ft lbs of torque. This car was exceptionally clean and garage kept...The c102 ground pod was taken apart just to see if mine had any green corrosion/oxidation like so many others have seen (even with low mileage and garage kept too) and my grounds had no corrosion and essentially looked new like the rest of the car. Thanks for the tip, Lonestar as I know these grounds have plagued many!
Don't mean to be redundant, but there are far more grounds than the easy to see/access grounds under or near the engine compartment or battery itself. Two in particular that have caused headaches of one sort or another are the ones that ground the engine block itself. Either of the two on the driver's side (one at the rear of the left cylinder head and the other on the side of the block) and the one going to the side of the engine block on the passenger side above the starter.
There are also a couple more ground junction points in the rear that are bolted to the frame and can affect the rear lighting and fuel pump as well.
There are other besides these, but I mention these especially as they are ones exposed to the elements so-to-speak.
No need to get overly concerned, just being aware of them and their importance is a good thing, especially if a problem pops up right after having or doing some sort of installation or repair work done.
I even went so far as to install a couple extra ground straps between the engine block and the frame (one right, and one left) because well, it's cheap insurance and super easy to do, but that's just me. I'm a big believer in preventive maintenance as opposed to corrective maintenance.