Questions & Answers for: GMC Sierra 1500 rough idle

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Question about 2000 New Sierra 1500

1 Answer

...rough idle replaced throttle body gasket , cleaned it . seems it still may leak but carb cleaner sparyed has no effect . dealer said after inpect may be fuel pump? can a throttle body warp? Im not ...

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Question about 2003 Sierra 1500

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Rough/Low idle then dies. I have a 2003 GMC Sierra. I was having a problem with a rough idle. I had the fuel pressure checked, which was fine. I had a trouble code read which lead to having the ...

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Question about 2000 New Sierra 1500

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2000 gmc starts but then idles rough then dies 2000 gmc sierra starts but then idles rough then dies. i belive the fuel pump is still working but yet i cant here it. I had to replace the mass air flow

2002 GMC Sierra 1500 4x4 5.3 Ltr. Idling rough when engine is cold. Dtc scanner giving codes: PO171, PO174, PO300. id do intake gaskets

rough idle just lower than it used to be. If the vehical had an idle adjusting screw thats all it would take because like I said its smooth.thanks IAC - idle air control valve problem maybe . Idle Air

Question about 2000 New Sierra 1500

1 Answer

...BY MANY THINGS.I AM LOOKING AT LEAKING VACUUM HOSES OR INTAKE MANIFOLD GASKET LEAK.DIRTY FUEL INJECTORS AND WORN ENGINE VALVES WILL CAUSE ROUGH IDLING.ALSO LOW IDLE SPEED CAUSE ENGINE TO RUN

Question about 2000 New Sierra 1500

1 Answer

...IDLE ROUGH AND IS DIFFICULT TO STAY RUNNING. NOW IT WILL TURN OVER THEN DIE.STILL IDLES ROUGH AND DROPS TO ABOUT 600 RPM.THE SERVICE ENGINE LIGHT CAME ON AND IT SHOWS TROUBLE CODE P0 300 RANDOM ...

i have a rough idle & it stalls at stops, otherwise runs fine, could it be the 02 sensor or throttle position sensor? it is either the throttle position sensor or the idle air control valve

Question about 2002 Sierra 1500

1 Answer

...V8 auto, has a rough idle. Changed both front sensors and all spark plugs and it is still idling rough, in park or in gear, it runs good if your driving. What should I try next? Faulty EGR

Question about 2003 Sierra 1500

1 Answer

idles rough when cold idles rough Throttle body positioning sensor could be bad or might need a toon up good luck

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