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GMC Yukon XL and Yukon XL Denali

4072 messages,  Last post on Dec 03, 2009 at 11:01 PM

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What is this discussion about? GMC Yukon XL, SUV


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#3968 of 4072
Reply to gapjs40 - stalling when slowing down by terryasullivan
Mar 20, 2006 (11:48 am)
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Replying to: gapjs40 (Mar 16, 2006 1:03 pm)

I have not had this problem, but it sounds like one the the symptoms of a bad 'crankshaft position sensor'.
#3969 of 4072
Re: Real world MPG [odysseyhunter] by racermd
Apr 15, 2006 (4:46 pm)
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Replying to: odysseyhunter (Feb 03, 2006 9:59 am)

I've got an '04 DXL and drive somewhat conservatively with an occasional thrill launch. That gets me roughly 14 MPG combined city/highway (about a 50/50 mix). However, your average MPG will vary greatly depending on what your city/highway mix will be. The Denali doesn't do so well around town as you might guess. It's a heavy vehicle that needs lots of power to get moving. Once it's moving and at-speed (such as a long highway ride), there's not much else that needs to keep it going.
 
I ran a round-trip from Minneapolis to New Orleans and got an average of just over 20 MPG! Even my "old" '01 Silverado couldn't get that.
 
The trick is to keep your speed from being excessive but also keeping it steady.
 
Also, keep in mind how much you're going to enjoy and spend on the vehicle in the long-run. There are much more imortant factors than simple fuel economy, even if your priorities might be tilted in that direction.
#3970 of 4072
What's the deal on trailer brakes? by 05yukonxl
Apr 25, 2006 (10:25 am)
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Does my '05 Yukon XL have a built in controller for trailer brakes? I recently rented a tandem axle trailer with a 7 pin wiring harness and was informed by the rental place that my Yukon controlled the trailer brakes. Is this true? Why are there aftermarket brake controllers if this is true? What does the "trailer brake" wire in the 7 pin harness do if it is not controlling the trailer brakes?
 
I routinely tow a 3000 lb. boat/trailer with surge brakes and it seems to work fine. Is there a reason to do anything differently?
#3971 of 4072
Re: YUKON PROBLEMS SHOULD BE RECALLED [gapjs40] by microstream
Apr 26, 2006 (8:02 pm)
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Replying to: gapjs40 (Nov 23, 2005 7:05 am)

Knocking sounds: try amsoil high performance synthetic lubrication. The oil had a drain life of 35K miles.
Grinding: probably front wheel bearings.
Stalling: likely a failing fuel pump.
Squeal: likely A/C compressor.
#3972 of 4072
Re: YUKON PROBLEMS SHOULD BE RECALLED [microstream] by microstream
Apr 26, 2006 (9:41 pm)
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Replying to: microstream (Apr 26, 2006 8:02 pm)

Here's a list of recalls for the 2000 GMC Yukon XL:
 
http://www.autosite.com/content/own/service/index.cfm/action/RecallsView/seriesi- d/17581
 
Others can be referenced from the same site.
#3973 of 4072
Re: What's the deal on trailer brakes? [05yukonxl] by terryasullivan
Apr 27, 2006 (9:19 am)
Reply

Replying to: 05yukonxl (Apr 25, 2006 10:25 am)

I would be very surprised if electric trailer brakes were standard on this vehicle. Historically, GM would supply a cable that allowed you to connect to your favorite controller. The controller then receives a signal from your brake light switch that tells it you are slowing down. The controller determines ( various methods employed ) how much voltage to supply to the trailer brakes and puts that voltage out on pin 7. Without the controller, there is no voltage on pin 7. I have never tried surge brakes. My electric controller allows you to adjust how much braking is applied to the trailer. I would guess that surge brakes do not allow this to be done from the cockpit.
#3974 of 4072
Windshield wiper problem on 2003 Yukon XL by peegee12
Apr 27, 2006 (9:54 am)
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Turned on the windshield wipers on my 03 Yukon XL and they wouldn't turn off -- had to pull the fuse. When I took it to the dealer for service, they "couldn't replicate" the problem. It's happened twice since then -- I pull the fuse to stop the wipers, and when I replace it several hours later, the wipers work OK. Anyone have similar problems/know of a fix? I've also had to replace the speedometer unit cluster (over $300!), and have had trouble with the AWD system lights going crazy. Maybe it was a bad Monday morning in Janesville when they put my dashboard together??
#3975 of 4072
Re: What's the deal on trailer brakes? [terryasullivan] by 05yukonxl
Apr 27, 2006 (11:24 am)
Reply

Replying to: terryasullivan (Apr 27, 2006 9:19 am)

Thanks for the clarification on this. If anyone from GM is listening - I am sure a built in brake controller would be a popular option for those who plan to do much towing.
#3976 of 4072
denali xl magnaflow exhaust by denalicanada
May 10, 2006 (11:26 am)
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I recently installed a magnaflow cat back system on my denali. The system looks good and sounds great at the curb. But at highway speed the interior DRONE is more than I can handle! Between 1800rpm and 2200 rpm the inside of the cab sounds like a jet on take off. I pulled the system off and I'm looking for a new exhaust. I'm considering the Corsa Touring. Has anyone tried this system? And if someone wants a used Magnaflow just let me know!!!
#3977 of 4072
Re: denali xl magnaflow exhaust [denalicanada] by tdoh
May 11, 2006 (9:24 am)
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Replying to: denalicanada (May 10, 2006 11:26 am)

Does the Magnaflow catback come in different muffler sizes? I ask because--and I can speak just for the muffler-only setups--how much interior drone is somewhat affected by how large (or small) the muffler is. I know of a few folks who run the larger Magnaflow muffler (5x11x22) on their Denali/DXL w/ very little to no drone at cruising speeds (except when you romp on the gas pedal, of course!).

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