Question about 2000 GMC Yukon XL

2 Answers

Voltage drop. When in parked I rev up the engine, when it comes down, the voltage drops from 14 to 10, for about 5 secs. I think the truck will cut off but it immediately comes back up to 14.

Posted by on

Ad

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • GMC Master
  • 3,204 Answers

Idle valve on the intake needs cleaning and the lower air intake pipe aswell

Posted on Feb 12, 2014

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • GMC Master
  • 21,873 Answers

If the alternator is weak, and you have accessories like the headlights or blower motor running, and the RPM drops below 600, the voltage could be below 12. It would depend on the load, RPM, and several other factors.

Posted on Feb 12, 2014

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get to try the service completely Free afterwhich it costs $6 per call and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

dennymulford
  • 1055 Answers

SOURCE: 2002 GMC Sierra High Voltage

could be just a bad gauge,thak it too auto zone and have them test it while its on the truck,if it reg the same on their tester then your got a short

Posted on Mar 01, 2009

  • 149 Answers

SOURCE: while driving headlights dim briefly

sonds like trouble with alternator. check to see what volts you have coming from it.

Posted on Sep 13, 2010

  • 1608 Answers

SOURCE: When I accelerate my truck doesn't go after it has

Sounds like you have a dirty or bad mass air flow sensor.It is located by the air filter in the air snorkel.What you can try first is just disconnect it and see if it makes a difference.When I say disconnect I mean the wire connector not the whole thing.You can remove it and clean it.Just go to any part store and get some mass air flow sensor cleaner and clean it.Make sure you install it back with the arrow towards the air flow which would be towards the motor.After cleaning just let it air dry.If this does not fix it you may have to replace it.It usually works if this is the problem.Another thing you can do is have someone check for codes.It could have a code for this sensor and the check engine light might not have come on.Let me know what you find out.Good luck.

Posted on Nov 30, 2010

Testimonial: "Thanks, this helped for a little while then I had to replace the MAF and that also worked for awhile. You are great at explaining!!!"

  • 12 Answers

SOURCE: oil pressure drops to zero when engine starts then

The 4.3 engine should have 20 to 30 psi at idle cold and around 50 to 60 psi running down the road. Has this engine had regular oil changes? If not the problem could be sludge build up. The oil pressure sending unit could be the problem. If in question about the sending unit install a mechanical gauge and watch the pressure.

Posted on Jan 02, 2011

ameezle
  • 100 Answers

SOURCE: My Service engine like is

If your check engine light is on and you find a P0420 code, it's a catalytic converter fault which is an emissions issue, not a performance issue that affects the way the engine runs. The catalytic converter is like an after-burner. It oxidizes (burns) any residual fuel vapors (unburned hydrocarbons or HC) in the exhaust. It also burns any carbon monoxide (CO) in the exhaust. The exhaust must meet federal emission standards, and if a problem exists that causes emissions to exceed the federal limits by 150%, the OBD II system is supposed to catch the fault, set a code and turn on the Check Engine light. A new converter can cost $600 to $1000 or more if a new car dealer or repair shop does the job, or maybe half that amount if you do it yourself.

Posted on Jul 13, 2011

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Ok so when I'm sitting in park and running, If I pushed the peddle slightly to rev up the engine and let off. She will go up fine but when she comes down she will studder and almost die out. If I shif


Couple of things....fuel filter could be pretty clogged....fuel pressure regulator is bad....
To make a better fix for you, can I get the info about your vehicle? Year/model/engine size?
Thank you.

Aug 19, 2013 | Cars & Trucks

1 Answer

When I start the car it stays at 2000rpm for a few moments then drops down. I'll drive for a few minutes then put it in park and it revs up and down.


idle air control valve is bad replace it. at start up choke control runs till warm up while driving throttle opening controls engine at idle ,the idle air control valve.

Aug 01, 2012 | 2005 Chevrolet Aveo

1 Answer

The voltage gauge drops when i rev the motor.


Have your alternator checked at your local alternator/battery store.. it sounds like a diode has gone bad...

Jul 21, 2017 | Ford Ranger Cars & Trucks

2 Answers

I have a 03 tiburon gt 2.7 and when you hit the gas the engine revs up to about 3100rpm for about 10 secs the drops down to about 1500 and surges up and down form 1500rpm to 2000rpm then it will idle...


its gonna be your clutch i had the same problem, when i floor it the rpms would go high then drop and take off i replaced it and it runs fine know

Feb 13, 2010 | 2003 Hyundai Tiburon

1 Answer

Vw polo maintains engine revs when foot is off the accelerator.


You need to check the cable the runs from the gas pedal to the engine, it might be rusty and need some drops of penetrating oil at the point it meets with the engine accelerator valve.

Feb 11, 2010 | 2007 Volkswagen Golf

2 Answers

Liberty will not turn over


Doesn't that jeep have an on board anti theft system that shuts of power to the startee and the fuel injectors. Im pretty sure it does thats where to start sometimes just turn the key to the on position for 30 sec. To 60 sec then crank the engine if that doesnt work turn off at least 10 sec try again tirn to on position without cranking motor for at least 30 sec then try cranking

Sep 20, 2017 | 2003 Jeep Liberty

1 Answer

Automatic choke stopped working- difficulty start- revs dropping low at stop


Quick and easy attempt to fix might be to try some fuel injector cleaner,the purple bottle stuff I put in, is only about $3 a bottle, and seems to eliminate similiar symptoms brought on by bad gas.

Jun 12, 2008 | 1990 Honda Accord

Not finding what you are looking for?
2000 GMC Yukon XL Logo

Related Topics:

83 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

76630 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...