Question about 1999 GMC Sierra

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99 gmc sierra surges while idling in gear what can i look for

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Where is idle control motor valve

Posted on Nov 17, 2015

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Clean the EGR valve and also the idle control motor valve

Posted on Jan 04, 2011

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1998 GMC Sierra 5.7L 350 Vortec surging


Check all your vacuum hoses especially at the PCV coming off the valve cover it is often over looked. The PCV fits loose either put a new bushing in the cover or add some black tape to the PCV at least until you figure out that might be the issue. Also your timing should be at TDC or 2 degrees plus or minus. Contrary to popular belief You can use a timing light you can see the timing mark know about where it is and line up the fly wheel mark accordingly.

Aug 09, 2012 | 1998 GMC Sierra

1 Answer

I have a 99 gmc Sierra v6, I'm not car savvy at all, how do I go about locating the egr valve and cleaning it?


EGR VALVE IS LOCATED NEXT TO THE TOP RADIATOR HOSE AT THE ENGINE, IT CAN CAUSE ENGINE TO MISS, STALL AND SURGE.

vetteman3002_0.jpg

Dec 14, 2010 | 1999 GMC Sierra

1 Answer

99 GMC Sierra 5.3L sputtering and hesitating


Check TPS for smooth and linear electrical response over the entire range of motion. If the response is jumpy or erratic at all, replace TPS.
Thank you for using fixya and good luck.

May 11, 2010 | 2000 GMC New Sierra 1500

2 Answers

Duramax surging when idling in gear at a stoplight,2005 gmc 3500


sounds like air in the lines.make sure fuel filter and wif sensor are tight.

Mar 07, 2010 | 2005 GMC Sierra

1 Answer

I have a 99 gmc sierra with 5.3 it takes about 7 seconds to start


Needs a valve adjustment. I assume its EFI, eliminating the possibility of the carb.

Sep 04, 2009 | 2000 GMC New Sierra 1500

1 Answer

Rough idle


Yes bad o2 sensor,check for vacuum leaks also.do you cross your plug wires?

Jun 26, 2009 | 1999 GMC Sierra

2 Answers

1992 gmc chevy 350 wont idle when warm


This could be a number of things but i think that your problem sounds like a vacuum leak or an EGR problem. Try listening for leaks and try un-plugging the EGR solenoid valve one time.

Apr 09, 2009 | 1992 GMC Sierra K1500

1 Answer

Engine wont idle


replace the timing gear its wore out

Feb 12, 2009 | 1991 GMC Sierra

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