What did you do to your NBS GMT800 Tahoe/Yukon Today?

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brian.roberts.1293

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I used these ac Delco iridium factory plugs. Says they are supposed to be good for 100k. But looking at my picture apparently there were at least 2 different sets of plugs. I'll have to look tomorrow I haven't thrown them away yet. 042a405b0d78f40c7084a416954098eb.jpg

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bottomline2000

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I used these ac Delco iridium factory plugs. Says they are supposed to be good for 100k. But looking at my picture apparently there were at least 2 different sets of plugs. I'll have to look tomorrow I haven't thrown them away yet. 042a405b0d78f40c7084a416954098eb.jpg

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What's the gap on those plugs?

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bottomline2000

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Most of that build up is from driving 30 miles with no spark. Also the gap was around .075.

Put a new AC Delco plug in gapped at .06 and codes are gone and it’s running normal again. Going to swap all new plugs in tomorrow night this will get me to work and back.

View attachment 204916

Might pull a scan tomorrow and send to BBP for review.
Where did you get the plug gap size of .060?. I know the plugs I'm running were originally .040 and gapping iridium plugs can be a problem.

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00'BlueSteel

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Where did you get the plug gap size of .060?. I know the plugs I'm running were originally .040 and gapping iridium plugs can be a problem.

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Hanes Manuel.
99-02 gap at 0.06
04-06 gap at 0.04

I believe the difference is flex fuel. Also I got AC Delco Platinums they were out of the Iridum plugs at my parts store.
 

PG01

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Haha yea. Also checked those connections clean and damage free. I'm at a complete loss as to where all this coolant went....

View attachment 204903 View attachment 204904 View attachment 204905 View attachment 204906 View attachment 204907
When was last time you noticed reservoir was full? My nnbs, within 15k of new, i noticed i was low in reservoir and filled it thinking factory never filled it up...10-15k later, low again....never anything on the ground, nothing in oil, no over heating.... nothing....started looking and sure as shit right on frame rail behind rad was coolant. It was a tiny leak and happened to land right on the frame, evaporate and never hit the ground. Since you’re going in anyway, after you’re done replacing and flushing make a note when res is full and keep eye on it if it goes low again start looking. You may fix it and never know however, if you do hoses, flush and fill... etc.
 

Bombsquad85

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When was last time you noticed reservoir was full? My nnbs, within 15k of new, i noticed i was low in reservoir and filled it thinking factory never filled it up...10-15k later, low again....never anything on the ground, nothing in oil, no over heating.... nothing....started looking and sure as shit right on frame rail behind rad was coolant. It was a tiny leak and happened to land right on the frame, evaporate and never hit the ground. Since you’re going in anyway, after you’re done replacing and flushing make a note when res is full and keep eye on it if it goes low again start looking. You may fix it and never know however, if you do hoses, flush and fill... etc.

Thanks for the heads up
 

brian.roberts.1293

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Bombsquad85

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PG01

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I need to change my diff fluid. I have no idea if it has ever been changed at all. Also my truck is flex fuel and I didn't check the gap cause my parts guy said they were already gapped.

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Dont care if they say dont gap plugs or they are pre-gapped.... i check on everything my cars, harleys, minibikes, lawnmowers....etc my 2c
 
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