What did you do to your NNBS GMT900 Tahoe/Yukon Today?

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08grey

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Ordered new front differential brackets a couple weeks ago from rockauto, had them put on today and a rear diff service, the old bracket bushings were pretty shot, seems to have eliminated about 90% of the clunk I was getting when accelerating from a stop or partial stop

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Part numbers? 6.2?

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Just bought new headlights and taillights (old ones were faded and scratched) going to upgrade the amber DRL to switchbacks. 06cec014a9d451462e516f47d67892ae.jpg818e92f1b4d50ede06c2a42152484c10.jpgcf313c15ed088ac99c14f0ad2d9e5419.jpg


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The DRL on mine aren't amber, but the white lower one (headlight).

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18
 

HiHoeSilver

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Fuel trim data and alcohol content, is the fuel trim learn automatic? it said disabled at first then enabled a minute later, is the fuel volatility low normal?

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All looks pretty good. The long terms are at 5. That's near the top end of what you'd like to see. Watch those for the next little bit and see if they keep creeping up.

The short terms are striving for stoich. The long terms are "more important" because they adjust based on what the short terms have been doing. If it sees the short terms adding fuel consistently, the long term bumps up so the short term gets closer to 0.

Lame analogy:

The short term guy is shooting free throws. His normal shot (0 trim) keeps falling short, so he shoots a little harder (5 trim) and starts making them (stoich). The long term guy says "we want your trim at 0“, so he moves the free throw line closer to the hoop (long term trim 5). Now the short term guy goes back to his normal shot (0 trim) and still makes it.

This is a constant game between the two. If the shooter starts launching them off the backboard, the long term moves the line back again. On and on. If the long term ever gets to +-25 it's gonna throw the rich or lean code for that bank.


What's the volatility thing you're talking about? I don't see that...
 
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