Question about 1999 GMC Yukon Denali

2 Answers

1999 yukon denali has power but will not crank the engine

Neutral safety swith is less then 6 months old, swapped starter relays and the last time this happened resetting the ecm fixed the issue. now back to no crank but it has power,dash lights etc

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  • GMC Master
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Sometimes the problem has been the ignition switch power to starter. If you have checked that, then:
This procedure usually works:
·Check the battery cable connections:
Make sure the negative cable makes a good ground connection at the battery and (preferably) at the engine. Make sure the positive cable, makes a good connection at the battery and at the starter.

·Check the battery the simple way, like this:
Turn on the headlights, then try to start the car.If the headlights do not dim or go out, then the battery is likely ok.

·Check the starter and solenoid:
If the wiring looks ok, then look at the starter solenoid for a good connection, and proper voltage at the starter(10 volts minimum while cranking).
If the starter spins and no crank, the problem is most likely the Solenoid's pinion gear is stuck.
Have someone hit (not too hard) the starter while you try to start the car. This usually works by dislodging a stuck pinion gear.
·Make a simple test of the alternator:
If you can, somehow get the engine running, measure the voltage at the battery. It should be at least 13.6 volts to properly charge the battery.

Posted on Apr 30, 2015

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  • GMC Master
  • 987 Answers

Check battery for enough cranking power, if battery is below 8 volts, your dash lights will work, but you wont have enough power to start the engine

Posted on Apr 13, 2014

Testimonial: "actually the neutral safety switch was out of alignment and the computer thought the vehicle was not in park. hence the reason why it had only lights and no crank. not even a click. thanks"

  • ffd708 Oct 06, 2014

    Actually it was a shorted wire at the neutral safety switch. Thank everyone for your suggestions

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Posted on Jan 02, 2017

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SOURCE: '04 GMC Yukon Denali Check Engine Light

Did u put in fuel shortly before the light came on? I own 2 service centers & the most common situation with "Check Engine" lights are because the fuel cap wasn't re-installed or not tightened. When you refuel make sure it "clicks" when putting back on. We don't charge for a "Code Reading" but a dealer will, don't go there. Go, like the others suggested. If it is the fuel cap & you re-install it correctly, the light will go off after a short drive. Good Luck. PS-Don't panic when the "Check Engine" light comes on unless it blinks, if that happens don't drive. PSS-RE: Murray's, Auto-Zone.......If it's a "Code" (the reader will give a #) the code book will tell you the problem. PSSS-Some1 please have Troy W's Mommy & Daddy take away his keyboard. Just because you can put together a "Lego" car doesn't make you a master mechanic. You only repeated what we said except you have a "Napoleon" complex against any1 plugging something in to a vehicle. It's the same as plugging in a light @ home. In conjunction with "kinder" nine out of ten time in my experience it usually is the oxygen sensor(s) which would be about right with the year model

Posted on May 18, 2008

mkv0525
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SOURCE: 1996 GMC Yukon,5.7l wont start

on a gm car or truck i have found that the battery side post ends get corrosion in between the rubber and the round metal plate.
take bolt and metal plate out, clean and reinstall btoh positive and negative ends. it will almost for certain fix your issue.let me know how it goes.

Posted on Jun 12, 2009

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SOURCE: 2004 denali check engine light stays on

There is no p01001, it's either p0100, or p0101.
Anyway, it's the mass air flow sensor that's bad. The p0171 and p0174 is a lean condition on bank 1 and bank 2, which are the oxygen sensors. Change the mass air flow sensor and that should take care of the p0171 and 74 codes.
The mass air flow sensor can cause the 02 sensors to read lean.
The u1301, is a class 2 circuit short to battery. That, you have to test wires to find with a voltmeter/continuity tester.
I would try and find that short before changing the flow sensor, you don't need the new one shorting out, they are not that cheap.

Posted on Nov 17, 2009

  • 1 Answer

SOURCE: 2004 YUKON XL DENALI, new throttle messed up delayed shift points

I recently had a low engine power on my 2003 Denali. The check engine light came on and I couldn't go above 40 mph. I took it in the next morning but by this time the check engine light had gone off. The mechanic had just recently seen the same problem in another Denali in which they changed the battery and had no problems since. I also decided to have them change out my battery and I have not had the problem since either. I would stay away from the dealership if I were you, and always get a second opinion. Most smaller shops wont charge for a diagnostic where the dealership will charge at least 80 just to tell you what might be wrong and that will only work if you have a warning light on at the time.

Posted on Feb 23, 2010

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SOURCE: 2001 Yukon Denali: The security light came on my 1999 Yukon Denali ye...

The security system (Passlock) is having problems, it's typical on those trucks. You can find a great write-up here: http://newrockies.ca , it was the only thing that saved my Park Avenue.

Posted on Jul 16, 2010

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Where's the clicking noise coming from ? Under the dash , under the hood in the engine compartment ? Do starter circuit voltage drop test ! When the key is in start position is there constant B+ voltage at the 10 amp crank fuse in the under hood fuse box ? This is an input to the PCM - engine computer to energize the starter relay ! Starter Voltage Drop The battery is good , starter is new ,what about the cables ? watch this video on testing starter circuit !

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2003 yukon will not turn over.When I turn the key all the dash lights come on. It started doing this about 6 months ago. It would usually start after 2 or 3 tries or if i put in nuetral and let roll a few...


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troubleshooting..... 1) put a test light on the small wire on the starter and see if it lights when attempting to start.if it has 12v or the test light is bright,,but will not crank,tap the starter gently with a plastic hammer,if it cranks the starter is bad.2) make sure the security light is going out.If not it is not reading the passkey and the ignition is faulty.3)when it does not start,jumper with a good battery and see if it starts if it does the battery voltage is low.4) make sure the brake lights go on with every application of the brake pedal.5)try to start in neutral instead of park when the failure occurs,if it does...the neutral safety switch is no good.
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