Question about 2000 GMC Yukon XL

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Instrument gauges and heat/ac randomly come on off together

Sometime everything works fine then i can hit a bump and all my gauges cut off but the lights still stay on and also my heating and ac cut off completely and dont work at all then i can turn in somewhere and everything will cut back on like nothing happened

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  • GMC Master
  • 3,180 Answers

Damaged fuse in the fuse box.

Posted on Feb 14, 2014

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 29 Answers

SOURCE: Heating System

The Engine Coolant Temperature (ECT) sensor is mounted in the intake manifold and sends engine temperature information to the ECM. The ECM supplies 5 volts to the coolant temperature sensor circuit. The sensor is a thermistor which changes internal resistance as temperature changes. When the sensor is cold (internal resistance high), the ECM monitors a high signal voltage which it interprets as a cold engine. As the sensor warms (internal resistance low), the ECM monitors a low signal voltage which it interprets as warm engine.
0900c1528008f125.jpgFig. 1: View of the Engine Coolant Temperature (ECT) sensor 0900c1528008f126.jpgFig. 2: Engine Coolant Temperature (ECT) sensor locationTESTING
See Figures 3 and 4

  1. Remove the ECT sensor from the vehicle.
  2. Immerse the tip of the sensor in container of water.
  3. Connect a digital ohmmeter to the two terminals of the sensor.
  4. Using a calibrated thermometer, compare the resistance of the sensor to the temperature of the water. Refer to the engine coolant sensor temperature vs. resistance illustration.
  5. Repeat the test at two other temperature points, heating or cooling the water as necessary.
  6. If the sensor does not meet specification, it must be replaced.
0900c1528008f120.jpgFig. 3: Intake Air Temperature (IAT) and Engine Coolant Temperature (ECT) sensor wiring diagram 0900c1528008f095.jpgFig. 4: ECT sensor temperature vs. resistance values

Posted on Oct 01, 2008

Brian032472
  • 150 Answers

SOURCE: fan for ac/heat does not work in front

It's the blowe motor resistor real common

Posted on Nov 03, 2008

  • 37 Answers

SOURCE: RUNS ROUGH WHEN AIR TURNED ON, LOOSE RPM'S

The A/C compressor clutch may be bad

Posted on Dec 08, 2008

  • 462 Answers

SOURCE: drivers side ac switches to heat

THE TEMP ACTUATOR IS BAD. SOMETIMES THE HVAC MODULE IS THE PROBLEM TOO.

Posted on Jun 16, 2009

  • 1 Answer

SOURCE: Electrical malfunctions in 2006 GMC Envoy XL

Check your ignition switch by checking the voltage at the fuses for affected circuts vs. other circuts that are working well...

Posted on Jun 21, 2009

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all the best

Happy to help
Have a nice day!
tc

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