Question about GMC Sierra 1500
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Posted on Jan 02, 2017
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.
Fig. 1: View of the Engine Coolant Temperature (ECT) sensor Fig. 2: Engine Coolant Temperature (ECT) sensor locationTESTING
See Figures 3 and 4
Posted on Oct 01, 2008
Well, unfortunetly, a lean code with low fuel pressure and a whining fuel pump all point to a failing fuel pump, which will leave you stranded. My suggestion would be to talk to the manager of the repair shop and have them work you a deal because from what you're telling me it sounds like they missed the ball on your first two visits. I would demand they not charge for the labor, so you just pay for the part. Let me know if you need further explanations.
Posted on May 18, 2009
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