Question about 1999 GMC Jimmy

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Picture for the vacuum lines on a 99 envoy - 1999 GMC Jimmy

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  • yadayada
    yadayada May 12, 2010

    sorry we have no such diagrams for any car or light truck.

  • coachd2_3 May 12, 2010

    well this is no good I need to know where all the vacuum lines go i got one thats not connected and cannot find the location that it belongs passenger side near the battery its been dissconnected from both ends and i have no idea where it can go

  • coachd2_3 May 12, 2010

    it looks like it should go to the transmission but i have no idea

  • coachd2_3 May 12, 2010

    coachd2-3@charter.net

  • coachd2_3 May 12, 2010

    well do you have the solution to the problem ???????????this vacuum line is connected to a wireing harness that is connected to the side by way of a bracket to the alternator but there is nowhere that i can find that it connectes too it looks to have went down beside the morter to the transmission and back to the motor but the conectors i cant seem to locate

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Rabiezstyle@yahoo.com

Posted on Apr 10, 2013

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  • GMC Master
  • 2,984 Answers

Please post your email address and I can email the diagram to you for free...no catch....reason is, we can't post pdf. files here and the diagram is a pdf. file.

Posted on May 12, 2010

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  • Greg Bernett
    Greg Bernett May 13, 2010

    I can email you a proper diagram but I need your email address!

  • chris89002 Apr 20, 2011

    id be intersted in this information, having same problems on my 99 gmc jimmy. email is chris89002@yahoo.com

  • wes1946 Jul 29, 2011

    Could you also email to me? I have a '99 GMC Yukon.

  • Banksno925 Aug 06, 2011

    can u send me one ? jd5399@gmail.com

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1 Answer

2000 envoy my heat was working but it made a loud whistling noise now it wont comeon at all hodo u tighten hose


Not an easy fix - sounds like either a heater/AC plenum control diaphragm started leaking, or a vacuum hose to one of them has popped off at the actuator or at the heater control, or the vacuum line developed a leak somewhere between an actuator and the heater control or the engine. You can try to pin down by checking airflow out of the defroster, ac and heater vents - if airflow is normal in each position, the problem is probably the heat/cool control actuator, the line from it to the heater control, or the heater control itself.

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vacuum hose diagram 99 ford explorer Google Search try looking at these pictures and you could also watch some you tube video's for info

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it is a leak in your vacuum tree that controls the blend door. You can buy spare vacuum line at a parts store pretty cheap. $1 per foot or similar. the trick is finding the bad vacuum line. look for small plastic line coming out of the firewall and replace if cracked

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I took my 02 envoy to get checked an the machine said i had a leak in the vaccum pipeline what does it sound like i need to do


The age of your vehicle guarantee's a vacuum leak. It may sound silly but the truth is rubber grommets and hose's shrink and dry out over time and the harsh environment under the hood makes it worse. Check all vacuum lines and fittings attached to the intake manifold, valve covers(pcv valve), and be sure to check for a vacuum fitting on top of the intake just behind the throttle body. Does it fit tight in the hole? You can seal loose fittings with a high-temp RTV (Red) silicone sealant/adhesive. Several small leaks add up and your engine, heat/AC, will be all to glad to tell you about it.

Check the vacuum line under and in front of the throttle body...with engine idling. It is located under where the air filter snorkel attaches to the engine. Then check all vacuum lines at the intake manifold. Check vacuum lines at distribution block on firewall and check the large brake booster vacuum line from one end to the other. You'll find it!

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1 Answer

NO AIR FLOW OUT OF DASH VENTS


It's most likely a vacuum line, look under your hood (close to the cowl panel) for a disconnected, cracked or broken vacuum line.

In some rear cases, it could be the vacuum switch (in dash). Or vacuum diaphragm (under dash).

Hope this helps you ???

Jun 21, 2011 | 2004 GMC Envoy

1 Answer

Evaporator system, large leak


That can be caused by a large vacuum leak usually at the vacuum lines to the EVAP canister, or a loose fuel cap could have caused that DTC (Data Trouble Code).

Check the vacuum hoses very carefully for any cracks or broken lines especially the vacuum hoses to the EVAP canister.

Jun 12, 2010 | 2004 GMC Envoy

1 Answer

When my 2004 gmc envoy xuv is idleing i put the heat on n it stalls out.why?


Either you have a vacuum leak or electrical issue.
First Inspect all vacuum lines.
Next test engine vacuum (17-21 hg's)
If all a-ok then its electrical and you got your work cut out for ya.Have to probe the circuit to see where its shorting and what its shorting to. I don't think it will be electrical simple because you would be blowing fuses if it was. Sounds more vacuum related..... and thats worse.

Mar 24, 2010 | 2004 GMC Envoy

2 Answers

99 ford f250 truck 5.4 need vacuum line schematics


Try ebaymotors they have repair manuals on cd that are inexpensive and have electrical schematics as well as vacuum diagrams. $15.00 - $20.00

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