Questions & Answers for: GMC Sierra low idle

Question about 2003 Sierra

1 Answer

idle too low The truck continues to turn off. I just replaced the alternator and whenever I come to a stop or go under 35 mph the meter begins to decrease and then it cuts off. The mechanic who ...

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...low idle will wash down the cylinder walls with unburnt diesel and remove the oil from lubricating the cylinders and rings. Hope this helps you understand why your diesel won't heat up while idling. ...

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low coolant level message. 2003 gmc sierra 4x4 the "low coolant level" message comes up and only stays on for a few seconds. has happened a couple times in the last couple weeks, seems to happen when ...

...idle no fluxuation in voltage at iac sensor 2003 gmc sierra It is most likely the EGR (Exhaust Gas Recirculation) valve. The valve is supposed to close when the car is idling and open other wise. ...

...low this could be idle air control valve or vacum leak you should see if you have any code they may help you beter go to your local part house most will do it for free then come back with the codes ...

Low / uneven idle problem can cause by a lot of components. Dirty air filter Dirty injectors + o-rings Vacuum leak at intake manifold and vacuum hose. Bad Idle Air Control Motor (IAC) Low compression

...Low Idle Emissions Failing NJ State Inspection for Low Idle emissions. Have replaced, EGR Valve, EGR selonoid, O2 Sensor, Idle Air Control Valve, Spark Plugs, Plug Wires, distributor cap & rotor, ...

...low idle test. The low idle numbers were cut exactly in half, but were still 5-10x the max allowable. QUESTION IS, what can cause JUST THE LOW IDLE emissions to be RIDICULOUSLY HIGH while the high ...

Question about 1990 Sierra

1 Answer

...the idle might be too low at some point. Things to look at will be the idle control solenoid, throttle body, MAF sensor, check if carbon tracked then clean out throttle body with carbeurator

idle or if low when above 20MPH the oil level is low or you have a bad oilpump or bearings.In rare occasions, diluted oil will show low and can fail to lubricate the engine due to contamination. 

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