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    Bolts

    Make sure whatever you use is Grade 8. Some big box home improvement stores sell Grade 8.
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    NEED HELP Cruise Control (Electrical issue)

    I've had a misfire code disable the cruise.
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    Oil Change Question

    OP - Where do you live? If you live in a cold climate, I would get that 10W-30 out of there before the weather gets cold. Probably be okay for the summer months.
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    Exhaust Manifold Replacment - input requested

    Dunno if you still have any broken off bolts that are sticking out of the head. If so, get yourself an Irwin 5/16-8mm bolt extractor. It works like butter. I bought a set several years ago when tackling this job based on a recommendation from another member. Think I removed three...
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    Which spark plugs do we like again?

    Don't buy them from Amazon. They sell counterfeit 41-103's. I had two sets wear out in 10,000 miles (and took a set of coil packs with them).
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    SOLVED! Grinding in the front right.

    Yes. Not a lot, but some. More than what you want to try to soak up with towels. Use a catch pan.
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    SOLVED! Grinding in the front right.

    There's nothing holding that gear into the housing other than the circlip on the end of the CV shaft. IIRCC, there's a thrust washer under there, but that's it. You could try prying up on the gear (carefully) with a flathead screwdriver or something. Your idea of using a puller would work...
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    SOLVED! Grinding in the front right.

    Think there's a procedure on this site somewhere for setting up jack bolts to get a stuck disco off the oil pan. Or, you could try taking the rest of the bolts out of the disconnect. That would allow the case to split, with half the case going with the CV shaft and half staying welded to the...
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    Updated ignition switch info and operation

    I'm on ignition switch number 5 in my truck, but I haven't had to change it since about 2009 so they definitely fixed the problem. It was changed almost yearly either under warranty or by me for the first five years I had the truck. I'm almost sure the one I have in there now has the gray...
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    Broken outer tie rod end

    I can't take 100% credit. It's a combination of something I saw on YouTube and how we aligned industrial equipment at a place I used to work.
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    Broken outer tie rod end

    Don't use an AC Delco Advantage. I used one a few years ago. The rubber boot disintegrated inside of a few months. An AC Delco Professional or OEM is probably okay. I've installed Moog's in both positions. Working well so far. You can do a rudimentary alignment with two jack stands...
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    SOLVED! Grinding in the front right.

    I've had a couple Timken hubs that I installed on my truck fail over the years. I went with a Moog for the last one I did. Right now, I have a Timken on one side and a Moog on the other. The Timken's I installed didn't go anywhere close to 100,000 miles. The Moog has about 25,000 miles...
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    "Service 4WD" after front disconnect install

    That was me. The actuator that came with my aftermarket disco did fail almost immediately. Just like gmcman, it failed in the extended position. It did cause a "Service 4WD" light when anything but 2WD was selected - even though it failed in 4WD mode (extended plunger should engage the...
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    SOLVED! Grinding in the front right.

    Chances are really good. I just went through this issue with my TB. I too thought it was the wheel bearing. Actually bought one to install. As soon as I got the wheel off, and started disassembly, the real problem was evident. Grab the inner tripot of the CV shaft and try to shake it up...
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    How long do you plan on keeping your Trailblazer / Envoy?

    I have an '03 with 215,000 miles. It's going to need tires in about a year. That's when I think I'll call it quits. It will be 18 years old with around 230,000 miles.
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    Quick Question - 4WD Disconnect

    Well, that didn't take long. Actuator failed on the disconnect assembly I bought from Amazon. Failed after 3-4 4WD engagements. Worst part was it failed in the extended position about 150 miles from home so I had to drive with the front wheels connected. It does have a noticeable effect...
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    Quick Question - 4WD Disconnect

    Amazon delivered - literally. Actually, it was the USPS ("Mail on Sunday? -Oops!" for any Seinfeld fans). Here's the one I installed. Installed easily. Seems to work. 4WD engaged. I'll report back if it doesn't last. https://www.amazon.com/gp/product/B07HS1RC41/?tag=elightbars-20
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    Quick Question - 4WD Disconnect

    Whew! Got lucky. Mine came off really easy. I was able to just pull it off by hand. No pry bar, hammer, or jack bolts. Perhaps it was Mooseman's suggestion to soak in penetrating oil last night (which I did). One detailed suggestion for anyone that has a disconnect that's seized to the...
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    Quick Question - 4WD Disconnect

    Thanks Mooseman. I also saw the post on rebuilding the disconnect over on Offroad TB said not to drive at more than a crawl without the disconnect because the intermediate shaft will be unsupported. I'll start soaking now. Amazon says parts are going to arrive at 9PM tomorrow night...
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    Oil weight question

    Mobile 1 makes a 0W-30 (available reasonably priced at Wal-Mart). I have an old Honda Civic that has a lot of valve train chatter in cold weather. Using the 0W-30 really quiets it down. I tried it in the Trailblazer one winter. Didn't seem to like it. It seemed louder than using Mobile 1...
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    Quick Question - 4WD Disconnect

    Found the outer bearing and outer seal of my 4WD disconnect destroyed. Ordered a new assembly from Amazon. Says it should be here in one day. Truck is a DD so I may have to drive it without the CV shaft for a while if Amazon fails. I've read plenty here that it's perfectly fine to drive...
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    Chicken or Egg (Plug or Coil Pack)

    Just a follow up on this old post. I said I would pull the Amazon 41-103's after about 10,000 miles to check for electrode wear before I started blowing coil packs again. Did that today. Sure enough, the electrodes were about half gone. Gap was about 0.055 on all the plugs - except the one...
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    Chicken or Egg (Plug or Coil Pack)

    I'm not getting a code for rich condition, but Torque shows the LTFT hanging around -12 to -15 while under acceleration. I'm not going to put any effort into finding that until it throws a code (16 year old truck with 200K). Here is a picture of one of the failed plugs next to a new one from...
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    Chicken or Egg (Plug or Coil Pack)

    I got the plugs off Amazon in a deal similar what was in Mooseman's post above - 6 plugs for like $16 - the ones that wore out AND the ones I just put in. I think there was a small amount of oil in most of the plug wells. I assumed that's where the brown scoring came from. You can see in...
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    Chicken or Egg (Plug or Coil Pack)

    I started having problems with misfires on cylinder 3 a couple months ago that I outlined here. My main question with that post was which AC-Delco coil pack to buy. As I mentioned there, I ended up buying a Delphi. Well, it failed about a month later. Had to replace it with a Duralast...
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    Which AC Delco Coil Pack?

    I verified that my OBD device continues to transmit Bluetooth even with the ignition off. My battery might be marginal. It's about five years old. I am in Wisconsin too so the battery is less efficient in the cold (even though it was 47 here yesterday). However, haven't had any problems...
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    Which AC Delco Coil Pack?

    P.S. - don't leave a Bluetooth transmitter plugged in to your OBDII port overnight. Battery will drain down to nuthin'.:duh:
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    Which AC Delco Coil Pack?

    I ended up buying one that was branded as Delphi. It was about the same price as the cheaper AC Delco (12568062), but came with Prime. The AC Delco didn't have prime and was going to take over a week to deliver. https://www.amazon.com/gp/product/B000CGM5T6/?tag=elightbars-20
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    Which AC Delco Coil Pack?

    I was about an hour into a two hour freeway drive yesterday and the SES light flashed for about 10 seconds and cruise control disengaged. Light did not stay on. Ran terrible for most of the rest of the way but made it home. P0300 was stored (Random misfire- I knew flashing SES was a...
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    "The Epitome... of Epiphone..."

    You aren't the only GMT wrencher that plays. I've got an American Standard Strat that I bought off Ebay about 12 years ago from a guy and Waco, TX at a price substantially less than what it was worth. Les Paul was from Waukesha, WI which is a western suburb of Milwaukee. Supposedly, he gave...

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