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  1. R

    Red wire with Black trace

    The info was correct. Thank you good forum members. It went to the 7 way trailer plug receiver, the 12VDC power for charging a battery.
  2. R

    Red wire with Black trace

    After my new engine was installed by GMC dealer, there is a red wire w/black trace going to nowhere right underneath the master cylinder. Does anyone know where that wire should go? It is a #14 maybe even a #12 size. I asked the dealer, they did not seem to know or care. 2010 GMC Yukon XL 1500...
  3. R

    Oil Gauge 0

    On the way back from GA Mtns oil pressure showed less than 20 lbs? This morning shows zero. Code reader P0523-Oil High Pressure. Does anyone know if oil sending unit dies , does the oil pressure indicate HIGH? I would think it would indicate low.
  4. R

    Anyone coolant gauge ever do this? Am I being picky?

    My Yukon 5.3L runs at that temp all the time in Florida.
  5. R

    No battery power, no start. 2010 Yukon XL 5.3L

    No start, no dash lights. Un-hooked neg battery post and re-attached. All power and dash lights came back, started right up. Anyone else ran into this problem?
  6. R

    Any help would be greatly appreciated! LOW OIL PRESSURE

    Clean you ground strap connections, two on engine block, one underneath driver seat on the frame, cleared my erratic gauge action immediately.
  7. R

    How about some gas mileage reports?

    2010 Yukon XL 5.3LC9 15mpg /21mphg70 mph
  8. R

    2010 GMC Yukon XL 1500 SLT 5.3L LC9

    Naples
  9. R

    2010 GMC Yukon XL 1500 SLT 5.3L LC9

    Live in Florida. Currently has 210 degree thermostat. Would like to change to 192 degree. Would it effect economy. Averages 15mpg 21 on the road.
  10. R

    What Is The Contraption Above The Oil Filter???

    Oil cooler dummy plate

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