Question about 2001 GMC Yukon XL

1 Answer

Loss of power, transmission not shifting

Recently on the way back home from an out of town trip the Yukon started to climb a mountain pass and the engine started losing power. I was traveling at 75 mph and it starting dropping speed.
It was as if it was laboring to climb. I pulled over, checked the trans. fluid level and it was good. I waited awhile to let the vehicle cool, restarted and continued my trip home.
The vehicle ran o.k for awhile, maybe 15 minutes, but started losing power again, this time on flat roadway. I pulled over, opend the hood, let it cool again and while I was waiting I noticed a small filter attached to the Air filter compartment and it was orange, the instructions on the filter said that if the color turned orange it was time to change it.
Could this of been the problem? I was now in the city and the vehicle ran o.k at city speeds ( 35 mph ) , but still hesitates to shift up when pulling out from a stop sign or stop light.
I also have to mention that the vehicle has never given me problems on trips so this is puzzling.

Posted by rmd54 on


1 Answer


  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that gotĀ 5 achievements.


    An expert who has achieved Level 3.


    An expert that hasĀ over 500 points.

  • Master
  • 398 Answers

That orange signal is telling you that your air filter is almost clogged up and the engine is not getting enough air to run porperly. By all means change your air filter. Depending on dust conditions that you drive in, this should be changed every 18 months or so.

Posted on Aug 07, 2008


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Loss of power climbing hills. Replaced the loss of power climbing hills. Replaced the transmission 2 years ago. Could it just be a dirty fuel filter or a bigger problem?

I got this, and it was a failed trans shift solenoid no 1. This rendered the trans unable to find low gears. However there should be a trouble code notified by a light on the dash.

Jun 17, 2015 | Cars & Trucks

1 Answer

1988 gmc transmission diagram

it could be as simple as a solenoid in the transmission or a mechanical issue best to find a friend that works at a shop and maybe they can give you a break on the diagnostics

Aug 29, 2014 | 1988 GMC C2500

1 Answer

A motorhome with Hp of a nissan z24 engine, can it climb steep altitudes? i.e. Andes mountains or the weight of the motorhome would be too much for the engine?

A few ideas. 1) Try the motor home where you are now and see. Find some REALLY steep hills or something and try it out.
2) If it is an automatic transmission, you may need to purchase a "transmission cooler" kit to add on before you try mountain climbing.
3) If it is a stick shift, take along another clutch disc and pressure plate and throwout bearing in case you burn yours up.
4) And remember, cars and trucks that normally operate at sea level will not do well in high mountains. They need to have the timing and/or carburetor set for high altitudes.
5) Many countries outside the USA have different octane ratings on their gasoline, you will need to take along the stuff to set your engine to the octane rating of the gas you buy.
Be blessed

Oct 07, 2013 | 1987 Nissan Pickup

1 Answer

2002 GMC YUKON THROWING CODES p0171, p0174 and p1571

Could need the throttle body position relearned. I believe on these models you can have someone relearn it with a good scan tool.

Mar 15, 2013 | 2002 GMC Yukon XL

1 Answer

Loss of power when going up

in the first place you must change the filter and the transmission oil in your automatic gear box , if the problem persists and your gear box shift not the gear for climbing hills it is a tehnycal problem with your gear box , but in my opinion ( i had a similar problem with my car ) this is the only problem. God help You ! Sorry for my English !

Apr 27, 2012 | Cars & Trucks

1 Answer

I have a 99 Lincoln town car signature series when I start the car it has overdrive on ..and I have to press the button to turn it off is that normal?

Yes. The DEFAULT is on. If you turn it off, it will turn back on if you turn the ignition switch off and back on again. The only reason you would want it off is if you are towing a trailer. In this case, you must turn it off each time you turn the ignition switch on to prevent transmission damage.

The only other time you would want to turn it off (towing or not towing) is if you are climbing a LONG STEEP hill - like in the mountains, and the transmission is shifting in and out of overdrive continuously.

Feb 21, 2012 | 1999 Lincoln Town Car

1 Answer

My 2001 GMC Yukon 5.3l 4WD SUV is having (2) transmission problems. 1.) When cold, it shifts HARD from 1st into 2nd but after the 1st time while the engine is warm, it shifts smoothly. It started doing...

Does the trany fluid smell burnt? Might want to have the trany flushed - torque converter too - and replace the filter in the trans. FYI you may know this but it is not recomended that overdrive be enabled when pulling a trailer - especially a heavily loaded one. Does your town have lots of hills - this is an added stain on the trany.

Nov 18, 2010 | 2001 GMC Yukon XL

1 Answer

99 gmc no power when passing or climbing

It could be the cat. it sounds like this could be your problem

Feb 02, 2009 | 1999 GMC Yukon Denali

1 Answer

Loss of power, transmission not shifting

i know the camp verde hill of which you speak , last vehicle in the shop with that same scenario , after doing everything possible including a catalyst check , as we could not duplicate the problem , we replaced fuel pump at owners request and next trip he confirmed it was a fix .

Jan 13, 2009 | 2001 GMC Sierra 2500HD

Not finding what you are looking for?
2001 GMC Yukon XL Logo

248 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts


Level 3 Expert

85239 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8984 Answers

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

Answer questions

Manuals & User Guides