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  1. mdmcinti

    Good crate motor suggestions

    Hey guys, Can anyone give me some suggestions on who makes/sells reputable crate motors or long blocks that I could replace my motor with? I read that I should stay away from atk long blocks. I was just thinking about going this route since I can swap a motor faster than tearing my motor down...
  2. mdmcinti

    Can I re-use my oil pan gasket.

    The gasket is about 6months old with 10k miles on it when I changed it back in October. It seems like it is relatively new so I wouldn’t be a big deal as long as I rtv the cover corners. I was just seeing if this is possible to do in order to save some money when I drop the pan to clean lifter...
  3. mdmcinti

    Valve lapping

    When I replace them cam and lifters on my Yukon xl. Since then heads are going to be off, I was going to clean and rebuild them on my kitchen table. I was seeing videos and threads where people would lap the valves when doing this. I also have read where a member on here did a cam swap and afm...
  4. mdmcinti

    Smart Method For removing stuck lifters in the engine block

    Hey guys, My Yukon xl had a lifter take a dump and eat the cam at 254k miles. Once my tax money comes in, I am going to tear it down to the short block and replace everything and rebuild the cylinder heads. I have been doing a lot of research on the repair and have been looking at what to do in...
  5. mdmcinti

    L33 cam In lm7. Will it need to be tuned to idle without stalling

    Hey guys. I have looked all over the internet for this answer and cannot find it. I did for sure find that an lq9 cam in a lm7 will cause it to stall out while idling with the ac on without a proper tune. The thing is the motor ate a lifter and took the cam with it and I plan on replacing...
  6. mdmcinti

    Vehicle feels like it is going over bumps on slow coast from a dead stop

    Hey guys, Yesterday I was in Reno for my wife’s doctors appointment and I went to pick up McDonalds for my daughter since she was asking for a happy meal. Anyways when I was in the drive through, when it was time to move up in line, this feeling of going over bumps after I let off the brake to...
  7. mdmcinti

    Boost valve upgrade on high mileage 4l60e

    Hey everyone. I wanted to make some minor improvements to my tranny keep it running as long as possible. I think it’s the original tranny at 241k miles. I was planning on doing a vette servo and a 4th gear servo, but I was reading about boost valves and seeing the benefit of bumping up line...
  8. mdmcinti

    Oil pump pickup tube o ring color from factory.

    Hey guys I got around to doing my oil pan gasket today which I think is the culprit to my leak since it was factory and never been changed in 241k miles. I did the oil pump pickup tube o ring too. It was a bluish green one that was in good shape. I replaced with a new red flepro one. Is that a...
  9. mdmcinti

    Things to check after front end work, alignment, or just when doing general maintenance.

    Hey guys. I found something interesting today. I was checking the front end for play in the suspension items when I was changing the oil and rotating the tires this morning. I was getting some play as of I had a ball joint on the passenger side. I took a closer look and the upper control arm and...
  10. mdmcinti

    Solution to Reduced Engine Power Message and p1516. Look Here

    I am sure this topic has beat to death on every GM truck and SUV forum out there in the internet, but I would like to share what I have found to fix the dreaded Reduced Engine Power message. I am sure more and more owners of these vehicles are experience this issue as these vehicles age. I also...
  11. mdmcinti

    Reduced Engine Power on Cold Cold Star and Afternoon hitting Bumps

    Hey everyone, I have a 03 Yukon xl 1500 5.3 with the flex fuel motor. So about a month ago I was driving to work and hit a bump on the highway. I got the reduced engine power message on the cluster and pulled over. After about two restarts everything was back to normal and I continued on my...
  12. mdmcinti

    Oil pan removal without removing the starter.

    Hey everyone. I have to do my oil pan gasket soon since it has a bad leak on my 2003 Yukon xl 5.3. I have done this before on a Silverado, but the starter side dust cover was missing so I did not have to worry about messing with the starter. Well by the looks of it, it seems like I can just...
  13. mdmcinti

    2003 Yukon..Weird Grinding sound when I turn AC on for the first after a cold start.

    Hey Everyone. Since it is finally starting to get nice out to where I have to turn the AC on when I drive my truck during the day, I have noticed this weird grinding/binding noise when I turn the AC on for the first start of the day. Like what I mean is a cold start in the middle of the day...
  14. mdmcinti

    Normal oil pressure or am I just over reacting.

    So on this GMC Yukon I have, my oil pressure is being kind of weird compared to my older trucks that I no longer own. So when I start my truck in the morning, the oil pressure is a hair above 40 psi. I let the truck idle and warm up for about 15 minutes before I head to work. The truck is not...
  15. mdmcinti

    New member from northern Nevada

    Hello Everyone, I am newbie from Nevada. I am not new to gm full sized trucks though as that I have owned two 2006 Silverados and a 2009 Silverado. I recently purchased a 2003 Yukon xl slt to replace my 98 expedition. It literally was falling apart and something new would break every week, plus...

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