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100K Maintenance

j98

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j98 Enthusiast

j98

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Posted

Hello all, just picked up a 2011 Sierra Denali here and the truck is missing any type of manuals. I was wondering if someone on here could either provide me a link to an online version or copy me the 100,000 mile recommended maintenance? Thanks in advance!

j98 Enthusiast

j98

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Posted

Thanks guys for the replies. It is a 1500, so its the 6.2L. I did have a question though, are the recommended spark plugs already gapped correctly? It calls out the AC Delco 41-110's, is this a good choice or is there other recommendations aside from the factory option? 

KARNUT Senior Enthusiast

KARNUT

Posted
Posted
Thanks guys for the replies. It is a 1500, so its the 6.2L. I did have a question though, are the recommended spark plugs already gapped correctly? It calls out the AC Delco 41-110's, is this a good choice or is there other recommendations aside from the factory option? 

I would pull a couple to see if they needed changing. The last truck I went over 100K on was an 04 Z71. 180K on those plugs at trade in. I asked my mechanic at 100K, he said the ones he’s been changing still looked new. As far as replacing I’d go back with the same brand.


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diyer2 Senior Enthusiast

diyer2

Posted
Posted

I would put in new plugs.

I replaced mine about 60 k on the clock.

They looked good but cheap insurance.

The longer they are in there the more prone to problems removing them due to aluminum heads.

Put ani-seize on new ones.

Service all fluids.

 

:)

j98 Enthusiast

j98

Posted
  • Author
Posted

Thanks guys for the help & advice. I've had mostly diesels so the service intervals are a little longer. The only other thing I noticed on this truck aside from a little valve clicking before I'm up to temp, is that the steering seems really difficult. The guy I purchased it from said it got a reman pump, but he wasn't able to pull up receipts despite me asking. The fluid level is fine, but the color of the fluid looks like a latte, lol. I plan on flushing that all out, but just thought I'd ask if theres any other wear parts on these trucks that commonly contribute to difficult steering? 

j98 Enthusiast

j98

Posted
  • Author
Posted

Well here's the first one that I took out... it looks a bit burned, is this typical on the LS motors, or should I be looking further into things?

Screenshot_20190105-124642.png

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