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Yukon "Reduced Engine Power message"

74 messages,  Last post on Oct 12, 2009 at 9:54 PM

You are in the GMC Yukon Forum. Your Hosts are steve_ & tidester

What is this discussion about? GMC Yukon Denali, GMC Yukon XL, Car Safety, Electrical, Engine, SUV

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#6 of 74 03 Yukon XL DEAD :( by stephc1 Sep 13, 2006 (3:47 pm)
Things have gone from bad to worse with my 2003 Yukon XL. You need to be CAREFUL!! Mine was fine for a week and then went nuts again with all the kids in the car. Mine was in the shop for a week...ran fine for a week and then died again. Seems like whenever they mess with the wires it behaves for a little while. Dealership is NO help...GM is NO help...I have no idea where to turn at this point. I have a beautiful vehicle...sitting in the driveway, can't use it. GM and the dealership didn't seem to give a damn that this is a MAJOR safety concern...in fact when I called the dealership this morning I was so upset I was crying...the manager said that he "didn't like the way I was speaking to him" and said there was nothing he could do for me. I wasn't even letting him have it! I am SO fed up and confused. I even went to a FORD dealership today to see what they had that actually ran and stayed running...only found one SUV I liked enough to test drive...but all I did was bring it home, park it next to my Yukon, and make fun of it...I hated it...I just want my Yukon. If you find any further info on this please let me know. There are several TSBs regarding this issue but GM didn't seem overly impressed with that either. Hopefully someone will be able to solve this problem. Stephanie Replies to this message: bryceman (Sep 15, 2006 9:47 am) danny57 (Dec 29, 2007 11:39 am) chipjumper (Dec 30, 2007 7:33 pm)
#7 of 74 Re: 03 Yukon SLT Power Problems by bryceman Sep 15, 2006 (9:47 am)
Replying to: stephc1 (Sep 13, 2006 3:47 pm) Hello from a new member of the Club. We just purchased an 03 Yukon one month ago. Yesterday my wife called and said the sound on the stereo had stopped working. A few hours later she called and said that it would not start. This morning I tried a jump start. It did start, but then I could not rev the engine over 1000 RPMs. I tried to take it for a spin, but couldn't get it over 5 mph. Lo and behold there was the "Reduced Engine Power" message you've all been talking about. This is a real concern. If that happened on the freeway we'd be in serious trouble. It sounds like taking it in to a shop may be futile though. Keep me in the loop on what's happening with you're rspective vehicles. GM does need to deal with this.
#8 of 74 FOUND THE PROBLEM!!!!!!!!! by stephc1 Sep 17, 2006 (5:38 am)
Don't pay huge money for diagnostics...please read!!!! I finally found someone that fixed my YXL and fixed it right...The problem is the ground wires. My mechanic tightened one that he found loose and the other one the clamp was messed up so the ground wire was flopping around and not making a good connection. When he touched the ground wire he could hear the fuel pump going on and off and other things making noises. It was a $3 dollar clamp that fixed it...too bad I spent almost $2000 on diagnostics with the dealership that was trying to tell me I had a bad transfer case module as well as a bunch of other BS and another mechanic before I brought it to this guy. Make sure your mechanic checks all the grounds (I didn't know that there's more than one) and tightens them as well as making sure the clamps are in good condition. My clamp was broken causing a bad connection. So...it's a $3 part that caused this hellified problem! I'm just glad to have my vehicle back in good running condition...no thanks to the dealership or GMC! Replies to this message: fundad (Apr 15, 2007 8:50 pm) twidget2 (Dec 04, 2007 2:18 pm) yukon03 (Apr 14, 2009 6:31 am) rsht (Apr 16, 2009 3:54 pm)
#9 of 74 still running great... by stephc1 Oct 04, 2006 (3:25 am)
Just wanted to let you all know that the last repair I posted about seems to have really worked. I was nervous for a while...waiting for my vehicle to die again but so far so good. (I'm probably going to jinx myself by writing this..lol.) Replies to this message: jtallen (Nov 24, 2006 8:18 am)
#11 of 74 99 Denali rear brakes by bct Oct 22, 2006 (10:18 am)
I was wondering if anyone knows of a way to convert the rear drum brakes on a 1999 Yukon Denali to disc. Any help would be great, stopping a 3 ton truck is not fun with those stock brakes. That may be why they changed the rears to disc on the 01.
#12 of 74 Re Conversion from drum brkakes to rear disc by beaudoin Oct 22, 2006 (11:32 am)
http://www.classicindustries.com/pdf/Truck-Susp.RearEnd&Brakes.pdf   please check this site and you will find a complete conversion kit available to you ...hgb
#13 of 74 Re: still running great... [stephc1] by jtallen Nov 24, 2006 (8:18 am)
Replying to: stephc1 (Oct 04, 2006 3:25 am) Hi there. I'm glad I found your postings. I just bought a 2001 Yukon Denali and it stalled on me the very day I was driving it home from the dealership. It started back up so I didn't think much about it. The next day it died and I had a hard time doing anything. It would sputter and die over and over. If I did get it started it would die if I got it up to 10 mph our so. Can you tell me where these ground wires are that you were talking about? Are they grounds for the fuel pump? are they located inside the tank? Any info you can give would be greatly appreciated. I am so sick that I spent that kind of money and it breaks down the same day I buy it.
#14 of 74 Rear end by bct Nov 26, 2006 (7:37 am)
The rear end in my 1999 Yukon Denali just blew up. Haven't taken it apart yet but something actually came through the cover from the inside out. I was wondering if anyone knew if I could get a rear end from a junk yard with disc brakes on it that would just bolt in place. I figure that if I have to change the rear end I might as well upgrade it to discs instead of those drums, plus the tow truck driver managed to kill the wheel cylinder on the passenger side anyway. Any help would be great, thank you.
#15 of 74 Re: update on the reduced engone power thing.. BEWARE!!!! [bonddog] by hershbbk Apr 15, 2007 (8:13 am)
Replying to: bonddog (Sep 05, 2006 1:06 pm) Hello everyone, I also have a 2003 Yukon. I have had the engine light on the last few weeks, have had it diagnosed, One place stated it was Fuel Pump and Fuel Filter, another o2 Sensor and another Mass Air Flow Sensor. I replace Fuel Filter. Light went away for a while. Its back on I had it diagnosed after unpluging the MAF Sensor and it gave the same codes as a bad MAF Sensor. This morning I went to start my car, it started then stopped, and the code that you all are talking about speared for the first time. Reduced Engine Power, and it will not start. Can anyone tell me what ground wires were found bad, or if anyone has a fix to get the vehicle started? Thanks Brian Replies to this message: beaudoin (Apr 16, 2007 3:30 am) bulldog15 (Jun 01, 2007 11:50 am)

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