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2007 and newer Chevrolet Tahoe and GMC Yukon

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#2144 of 3125 Front differential leaking by sastoker Dec 21, 2006 (7:31 am)
My 07 Yukon was just in the shop for a leaking front differential. While they were doing an oil change on it they discovered that it was leaking.   Only 14,000 miles and seals are already leaking. Even though I love the thing it drives me nuts that GMC engineers/manufactures so poorly. Replies to this message: bk777 (Dec 21, 2006 7:58 am) sastoker (Dec 21, 2006 11:40 am)
#2145 of 3125 Re: Front differential leaking [sastoker] by bk777 Dec 21, 2006 (7:58 am)
Replying to: sastoker (Dec 21, 2006 7:31 am) Look out...the dealer may tell you that a certain amount of leakage is "acceptable". GM has been doing this forever. Take a position that zero leakage is the only acceptable solution...otherwise you may get something(big repair bill) that you won't like. Replies to this message: sastoker (Dec 21, 2006 11:40 am)
#2146 of 3125 Re: Front differential leaking [bk777] by sastoker Dec 21, 2006 (11:40 am)
Replying to: bk777 (Dec 21, 2006 7:58 am) They fixed the seal. According to them it was either a faulty seal or installed incorrectly. Lucky for me since it was in the shop they also performed the new reprogramming recall that previous posts have referenced. I just hope the reprogramming doesn't cause me any new problems.   Paying ~$50K for something that leaks is a quick way to get customers upset. I would have not settled for anything other than them fixing the leak. Kind of like the Harley Davidson legacy. Although in the case of GMC it could play a part in ruining them further.   One more comment for kicks, when the service rep told me that my rental was a Saturn I guess he was expecting me to blow up. Although it is pathetic that they give Yukon/Tahoe owners little compact ($12K) cars to drive while their SUV's ($50K) are tied up being fixed for a manufacturers defect it isn’t that big of a deal for one day.
#2147 of 3125 Re: Recall# 06162 for ECM reprogramming - 2007 [jerrywimer] by greggboston Jan 02, 2007 (4:37 pm)
Replying to: jerrywimer (Dec 21, 2006 3:43 am) A little more info on the recall (#06162).   GM is calling it an "enhancement" for flex fuel vehicles (FFV) and are planning on updating dealer inventory and customers I assume as they return to the dealer. It is not a safety related recall. The date of the recall was 12/12/06.   From what I have observed the AFM system may have been desensitized and seems to drop into V4 mode more readily and stay there. Haven't had an opportunity to do some MPG studies to see if it has actually improved.   I suspect, and this is pure speculation on my part, that a lot of the compliants about MPG with the 2007s may have been related to FFVs and this is GM's answer to the issue. I'm really really curious whether anyone out there has had this update applied and noticed an MPG improvement.   BTW this board has been really quiet lately - guess everyone's out there enjoying their 2007's!   Regards, - Gregg Boston, Mass Replies to this message: kssooner (Jan 18, 2007 4:15 pm) 07hoe (Jan 19, 2007 3:07 pm)
#2148 of 3125 Recall#06162 by p356a Jan 02, 2007 (6:55 pm)
I just had the "enhancement" performed on my 2007 Yukon which was delivered in late august 2006 and definitely noticed an improvement in the engines ability to go in v-4 sooner and stay longer. Hopefully this translates into better MPG.   I learned about this recall on this forum and when I asked my dealer he said my car was due. I never received a recall letter. Is this a recall or simply an enhancement performed by the dealer at will.
#2149 of 3125 Re: Coastel Tech Nav Bypass [twernst10] by johny7 Jan 03, 2007 (11:51 pm)
Replying to: twernst10 (Oct 19, 2006 6:56 am) Has anybody tried out the new GM LOCKPICK GEN 2 from coastaletech? Are there any unsupported features with this version of the GM LOCKPICK GEN 2? Finally, how well does it work…..would you recommend it? Replies to this message: junglegeorge (Jan 04, 2007 4:19 am) triadium (Jan 10, 2007 3:47 pm)
#2150 of 3125 Re: Coastel Tech Nav Bypass [johny7] by junglegeorge Jan 04, 2007 (4:19 am)
Replying to: johny7 (Jan 03, 2007 11:51 pm) Works great, I just got back from NC a 1500 trip, and I installed it just before I left. I have a 07 LTZ with all the toys except the rear DVD (no kids). I purchased the GM LOCKPICK GEN 2 to unlock the nav and Xm, it works perfectly as designed, I used the switched power output to power my radar detector. Installation was simple, the most difficult part was removing the trim from dash. Try a blunt blade with some duct tape, that worked for me. Good luck.
#2151 of 3125 Fuel Management Enhancement by tony97gt Jan 04, 2007 (7:05 am)
I called my dealer today and they said they are not doing that enhancement program in my vehicle, I am assuming because mine is not flex fuel. I am pretty sure that most of the other people (including me) that bought these vehicles were mislead about the performance of the AFM. I want my vehicle re-programmed to get better AFM on highway. I do most of my driving there and I would benefit from re-programmming. Anybody else with me on this? What do we need ot do to get them to re-program all AFM vehicles, flex fuel or not.
#2152 of 3125 recall/enhancement by dallgower Jan 04, 2007 (7:16 am)
So is this enhancement for GM Yukons only or does it apply to Tahoes too?
#2153 of 3125 recall for reprogram by ltzin Jan 05, 2007 (7:36 pm)
Has anybody had the re program done with a cat back and a air box? Have you noticed any difference?   I have a GMPP cat back installed, just ordered the GMPP air box, also just received my Diablosport Preditor tuner. I think I will bring to the dealer to get the oil changed and make sure the re program is done before I install the new goodies.   Anyone have similar mods. Would like to know how the truck performs. Replies to this message: tuscotodd (Jan 05, 2007 8:47 pm)

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