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GMC Yukon Denali, GMC Yukon XL, Car Safety, Electrical, Engine, SUV
#104 of 585 Check Engine Light/Engine Reduced Power
Jan 13, 2011 (9:38 am)
Hello My Fellow GMC Owners!
I am posting my recent ordeal with my 2007 GMC Yukon, because I too am extremly frustrated with the incidents and mainly GM, and their poor products, and customer service. Over the last month, I had three seperate incidents whereby I was driving and the check engine light would appear, and within moments, the engine reduced power message flashes, and the vehicle loses power. Luckily, each time I was able to pull over to the side of the road/interstate and out of harms way.
I took the vehicle to the same GM dealership each time. The first time, they reset codes and cleaned the throttle body. Two weeks later, the incident occurred again. Back to the dealer, and this time, a different set of codes (unsure which ones) and I rode off into the sunset. Only to return three weeks later, with the same issue. On this visit, the decision was made to replace the throttle body.
Here is my issue - my 2007 GMC has on 77,000 miles and is covered under the 5yr/100,000 powertrain warranty. The throttle body assembly is a covered component under this warranty. In 2010, the warranty was altered by Gm and they no longer cover this part, amongest several others. But this is only for 2010 models and newer! Therefore, models 2009 and older ARE covered. I had to generally go to war with the GM Area District Specialist, about this issue. He wanted to say because they made the changes to the 2010 warranty (removing the throttle body assembly as a covered part), my 2007 vehicle was no longer covered. After a week of constant debating, and the investigaton by a different District Specialist, they covered the part and advised the confusion was their error.
So, if you have a vehicle with the specified problem and it falls under warranty (within the designated mileage, less than 100k miles) FIGHT to make certain it is taken care of under your warranty. This part is $500+ to repair out of pocket, and you shouldn't have to pay it when it is covered.
Hope this helps! In addition, I have filed this complaint with the National Highway Traffic Safety Administration (www.nhtsa.gov), and your complaints can help our problems be elevated to a recall status, and protect others and even safe a life. Go to their webite or call to file the complaint! There is strength in numbers! Also, please see the attached bulletin below. This way you can read it for yourself. Good luck!
GM Service Operations
DATE: September 21, 2009
TO: All US GM Dealers, Service Directors, Warranty Administrators and Parts Managers
SUBJECT: Changes to the General Motors 100,000 Mile/5 Year Powertrain Warranty for 2010 Model Year Vehicles
This message is to provide information regarding the a few changes to the GM Powertrain Warranty for 2010 model year vehicles. Previous model year vehicles are NOT affected by these changes.
For model year 2010, General Motors is announcing a slight change in the components that are covered under the 100,000 mile/5 year limited warranty on all light duty cars and trucks. The Warranty and Owner Assistance Information booklets have already been updated with these changes in all New 2010 model GM vehicles.
The following items have been eliminated from the Powertrain portion of the coverage for 2010, however, they will continue to be covered for the entire length of the Bumper to Bumper Limited Warranty for all GM vehicles. Select components may also be covered by Federal or State Emission coverage. Please refer to the Labor Time Guide and Policies and Procedures (P&P) manual for further details.
1) The entire pressurized fuel system (in-tank fuel pump, lines, fuel rail, injectors and return line.
2) The Engine/Powertrain Control Module (ECM/PCM) and module programming.
3) The Transmission Control Module (TCM), Transfer Case Control Module and module programming.
4) The Throttle Body Assembly.
5) Clutch and Pressure Plate for Manual Transmission.
6) Sealed Wheel Bearing Assemblies or Hub and Bearing Assemblies (axle shafts, seals and bearings that are part of
complete axle housings are still covered).
The following items have been added to the Powertrain portion of the coverage for 2010.
1) Engine oiling system including the hoses, lines and cooler.
2) Crankshaft Pulley.
3) Clutch Master Cylinder.
The GMVIS (GM Vehicle Inquiry System) and the new Global Warranty Management Investigate Vehicle History screen allows you to identify this new warranty by the abbreviated description under the Applicable Warranties section. The word warranty at the end of the description is abbreviated “WTY”. Previous 100,000 mile/5 Year Warranties have the entire word spelled out.
See: www.truthaboutcars.com for the full posting of this memo.
#105 of 585 Re: Help! Reduced Engine Power Warning [rsht]
Jan 22, 2011 (5:36 pm)
I work and a car lot and i had the same problem with 2 of my trucks , i fixed the problem with the first GMC truck changing the battery and the other one was the ground ,.
#106 of 585 Re: 2 Yukons and SAME Issue "REDUCED ENGINE POWER" [jonesey_101]
Jan 24, 2011 (4:11 pm)
At least on my case, both cars had the TB with problems. The mechanic that I take my cars for electronic problems is MUCH MUCH more experienced than any other DEALER (per say) specialist and he has lots of years specific in electronic diagnostic trobleshooting, so he's basically like a very good neurological doctor that can answer lots of questions and find solutions where things don't look so logical. I had both cars fixed at the same day, but I want to make it clear that even my guy said other problems can cause the "reduced engine power". So on my case so far so good.
#107 of 585 Reduced Engine Power
Jan 25, 2011 (1:35 pm)
My mother-in-law is having the same issues with the 'reduced engine power' light. I'm very suprised that there has not been a recall on the faulty parts or even the entire vehicle itself by GMC. This problem can be very dangerous. The most recent incident left my mother-in-law and her 2 children suddenly stuck in the middle of a very busy freeway with no power. I guess once someone reports injury or death then GMC will take action.
#108 of 585 Re: Reduced Engine Power [bekarussell]
Jan 25, 2011 (1:43 pm)
My yukon Denali 2003 is back in the shop for the 6th time. I can't believe GMC doesn't care about its customers more. I was brought up to believe in America and her products but this is really making it difficult. Unless something is done soon. I know I will not ever recommend a GMC or purchase another one myself.
#109 of 585 Re: REDUCED ENGINE POWER - PROBLEM SOLVED [gmcustsvc]
Jan 25, 2011 (1:53 pm)
Dear GM Customer Service,
My vehicle has approximately 160, 000 miles. The barrings have been replace the wires have been grounded, a new battery to make sure ample power is there...I will be going down the street, highway, interstate wherever...it doesn't matter how fast or slow I go ... it will going along and without warning it powers down and gives me on the display REDUCED ENGINE POWER then it drops to around 10 miles per hour also right behind the display message REDUCED ENGINE POWER it gives the message Stability System Disabled. I can pull off the side of the road after much honking of the horn and stress..turn the key off and wait a few seconds crank it and go again..sometime it doesn't do it again other times in order to travel 20 or 25 miles I have to pull over 7 or 8 times.. do you have any idea how frustrating this is or for that matter how dangerous this can be? GMC please do the right thing...recall or at the very least get the information out to your mechanics how to repair the situation without people having to take the vehicle back again and again and again...
#110 of 585 Re: GM reduced engine power light [gmcustsvc]
Feb 02, 2011 (9:15 am)
Yes Christina, you can tell us what is causing this problem?
Feb 06, 2011 (7:29 am)
I have a 2007 Chevy Monte Carlo and have been dealing with a reduce engine power for the past month. This has cause me frustration as well danger when I drove my vehicle on the highway when I lost all my power.
I never deal with the dealerships when I need work on my vehicle, I have a mechanic in town who doesn't rip me off. This time he not sure what's going on with my vehicle and doesn't want to want to start guessing.
The other day I dropped my vehicle off at the dealership wereI purchased my car. when I started to explained what was wrong with my car he said to me you can write it down on this form and we will be in touch with you on Monday or Tuesday. Also, there will be a 90 dollar diagnosis charge. There was no customer interaction, and showing they wanted to work with me.
#112 of 585 Re: REDUCED ENGINE POWER - PROBLEM SOLVED [jonesey_101]
Feb 09, 2011 (4:14 pm)
What I need you to do is send me and email with your complete contact information including a good number to reach you, VIN, current mileage, and involved dealer. Please include the post I am responding to in your email.
Christina GM Customer Service
#113 of 585 Re: Reduced Engine Power [bekarussell]
Feb 14, 2011 (7:35 am)
I apologize for your experience. Have you taken the vehicle in to your local GM dealer to be diagnosed? If not i would definitely recommend doing so. Please keep me updated on your situation.
GM Customer Service