Recent content by josephc

  1. J

    2005 Yukon XL2500 throwing solenoid error codes

    No aftermarket stuff on this truck. Its exactly the same as when I drove it off the lot.
  2. J

    2005 Yukon XL2500 throwing solenoid error codes

    Yes, we are down to the nitty gritty on this one. Battery and alternator check good, redid all the grounds in the engine compartment and under the drivers door on the frame. Doing a point by point check on the harness today. UGHHH! My nagging concern is that the dealer pulled the transmission...
  3. J

    2005 Yukon XL2500 throwing solenoid error codes

    External harness connector and 12 inches of harness replaced. Still not clearing codes. Any other ideas would be greatly appreciated. Cleaned grounds under drivers door. I am now stumped as to the next course of action. TYI
  4. J

    2005 Yukon XL2500 throwing solenoid error codes

    DELCO PARTS. ( damn spellcheck )
  5. J

    2005 Yukon XL2500 throwing solenoid error codes

    New external harness pigtail won’t be here until Saturday. Disassembled connector and cleaned wires and connector with brake clean and contact cleaner. Still sending error codes. Used all Delhi parts.
  6. J

    2005 Yukon XL2500 throwing solenoid error codes

    8.1 engine, 4L80e transmission. 233k miles. It started throwing multiple solenoid error codes and would not shift out of 1st/2nd gear. Cleaned the grounds under drivers door. Transmission shifted ok, codes went away and then started up again after a couple hundred miles. Found the connector on...
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