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'03 Yukon Denali XL. Rpms go up to 3K at around

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  • Cars & Trucks Master
  • 2,101 Answers

When you had the transmission filter and gasket changed. do you know if they back flushed the fluild. there is 5 to 7 shift soleniods in the transmission. when garages back flush transmission it causes the solenoids to close. are there any codes. sounds like your 1st and 2nd shift solenoid is stuck closed

Posted on Nov 28, 2012

  • 1 more comment 
  • DEANDRA Nov 28, 2012

    I'm not sure a mechanic friend if mine did it because it was doing this in hopes that the filter/fluid change would help. I will have to ask. If the selenoid is closed what is the solution? No codes no lights on nada.

  • teds repairs
    teds repairs Nov 28, 2012

    see if you have any codes. it is very easy to change solenoids. all these new transmissions have them. send you a basic idea pictureand the parts stores have most of the shift solenoids. this is my link to my garage I am on facebook.:https://www.facebook.com/TedsRepairs

  • teds repairs
    teds repairs Nov 28, 2012

    and I need to know what type of transmission fluid he put in

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6ya6ya
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Posted on Jan 02, 2017

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hdpanama
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SOURCE: Intermittent Rough Idle in gear at stop

well it didn't hurt anything to put the new fluids in. Always good to keep up on those some of the time forgotten routine maintenance. The erratic idle could be caused by a number of things. A leaking intake manifold gasket is one but usually is a steady higher racing idle. Could be clogged injector/s, not sure if you have a throttle body which would house a single injector or a fuel rail which would house 4, one by each cylinder. The other possibilities are any of the sensors that feed the information needed to the brain/on board computer to control the air and fuel to the engine under all conditions for optimal performance, and the emission control system.
Trouble shooting comes with several options. Fortunately most vehicles since the start of the electronic fuel injection systems, that would be everything since the end of the carburetor, comes with some description of an on board diagnostic system for trouble shooting the sensors and such.You can purchase a diagnostic tool, and you will need to purchase a Haynes or Chiltons Manual for your year make and model which will tell you what all of the different codes mean. You can find these at any of the auto part chains such as Auto Zone, Discount Auto Parts, Pep Boys etc. Most of these stores will test your on board diagnostics with their tool free of charge. The Manual never hurts to have in your possession as it covers mostly everything from A to Z for mechanical and electrical repair and troubleshooting. Some vehicles have a way of giving you error msg's by a series of turning the ignition key on and off a certain number of times, and giving a code by a series of an in dash light blinking and pausing, this would also be covered in the manual for your make and model.
Hope this helps,
Matt

Posted on Nov 25, 2008

  • 24 Answers

SOURCE: ford 2001 explorer sport transmission slipping 2nd to 3rd gear

I agree with the shift solenoid being the problem.

Posted on Feb 21, 2009

Molson02536
  • 3854 Answers

SOURCE: whirring noise front end 2003 yukon denali xl

Your front pump in the transmission could be going bad. Check the transmission fluid for level and condition. The fluid should be bright red and not burnt (dark in color like burgandy). Best thing to do is take it to a transmission shop and have them check your truck for DTC codes with a Tech 2 scanner and have them do a transmission line pressure test. The whining can also indicate low on transmission fluid and that's bad, you may have burnt some of the clutch packs already and shorten the life of your transmission. Good luck and keep me posted, be glad to help.

Posted on Jun 28, 2009

  • 1168 Answers

SOURCE: How do you change the transmission fluid in a 2004

At the bottom of your transmission there is a large square/rectangular pan (depends which trans you have). Have a large drain pan to catch 5 to 9 liters/quarts of transmission fluid. Undo all of the retainer bolts and carefully lower the pan (this can get messy for the unexperienced) .
In some cases the rear transmission mount may need to be undone and the rear of the trans lifted to allow clearance for the pan to be slid past the crossmember.
Replace the trans filter too!

Posted on Oct 31, 2009

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Where is the 2003 GMC Yukon Denali XL Cabin Filter


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Jun 11, 2010 | 2003 GMC Yukon Denali

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I have a 2003 GMC Yukon Denali XL. Everytime I turn to the right I feel something banging in the steering wheel


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May 10, 2010 | 2003 GMC Yukon Denali

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99 yukon denali my transmission doesnt go into overdrive


Boy, do I feel for you...I hate to say it, but as a GM mechanic for thirty-five years, I can promise you that this 4L60E transmission is dead. Unfortunately, 4L60E's are relatively weak in stock configuration. I have repaired this exact problem many times. Here's what you do:
When you get the transmission rebuilt, tell the builder that you want, as a minimum over a stock rebuild, the following parts installled...you want a hardened input shaft, The Beast sun gear reaction shell, the 29-element Borg-Warner input sprag, the Alto master rebuild kit with all molded rubber pistons, all Alto Red Eagle frictions and full-thickness Kolene steels throughout (including in the low/reverse clutch pack--reverse is a weak spot for 4L60E's), 13-vane pump kit, the Sonnax .490" boost valve, a new reverse drum and an extra-wide (2 5/8") carbon fiber power band, a Sonnax cast-aluminum pinless forward accumulator piston, the Sonnax heavy-duty 2-3 shift valve, Sonnax "Super Hold" 1-2 and 3-4 servos, the Transgo valve body separator plate, and a 15,000lb-capacity auxilliary transmission fluid cooler, installed in series in addition to the transmission fluid cooler core built in to the radiator. This build will cost you about 600-800 bucks over a stock rebuild, but your transmission will shift firm, crisp, and reliably every time. You will think you have added about 100 horsepower to your engine without having even touched it. This transmission will tow anything you hook to it, will yank any Ford, Toyota Tundra or Nissan Titan all over the parking lot and burn up their transmission, and it will still be going strong when you sell the truck someday. GM trucks are awesome with the proper build on the transmission. I have three built this way, and tow a thirty-three foot camper and a 10,000lb car-hauler with all of them.

Feb 21, 2010 | 1999 GMC Yukon Denali

1 Answer

Whirring noise front end 2003 yukon denali xl which seems to be coming from front left wheel or even the middle of the front end. loudest when coasting around 20 mph with little or no accelerator. Noise...


Your front pump in the transmission could be going bad. Check the transmission fluid for level and condition. The fluid should be bright red and not burnt (dark in color like burgandy). Best thing to do is take it to a transmission shop and have them check your truck for DTC codes with a Tech 2 scanner and have them do a transmission line pressure test. The whining can also indicate low on transmission fluid and that's bad, you may have burnt some of the clutch packs already and shorten the life of your transmission. Good luck and keep me posted, be glad to help.

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1 Answer

I have a GMC Yukon XL that shifts hard 1st to 2nd gear.


sound like shift valves sticking in valve body.

Apr 26, 2009 | 2002 GMC Yukon Denali

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