2010 Yukon Denali - 2 Issues

[soulsea]

Okay so a little update on these two issues now that I've had her for almost three weeks ...

- The dimming issue is still there, but I guess I got used to it cause I don't notice it anymore. I was still going to buy this Big 3 kit: http://www.edesignaudio.com/product_info.php?cPath=1_76_28_56&products_id=164 Maybe someone can confirm that this is indeed what I need.

- Much to my surprise, the service manager was right and the transmission has greatly improved since 'learning' my driving style. It's still not perfect by any means but I have about a month to go till the end of a 'learn' cycle ... with the more aggressive acceleration I am implementing I'm hoping that by the end of the cycle the issue will be as minimal as can be expected.

 

[KMeloney]

So Kirk you have a 5.3L 6 speed?

Sorry for not getting back sooner, but yes, that's what I have.


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[mattah]

From what I understood it's something that started in 09 or 10.

No, the dealer said it put mine on learning mode after i had a tranny flush. Its running so much better now. (I have an 07)

 

[soulsea]

http://www.tahoeyukonforum.com/forum/showthread.php?t=9674

 

[sbhva]

I have noticed the shifting lag on my '09 Denali and it seems to go away with better gas. I live in Milwuakee, WI and we have to use "reformulated gas" because of EPA air quality emission issues in a 5 county area. It causes a hit to my fuel mileage too. When I travel and get non-reformulated gas the shifting issues go away and the fuel mileage gets better.

 

[JennaBear]

All 6.2Ls should be running premium gas (good quality as well).