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  1. W

    Tech 2 Scan Tool - Clone - SOLD

    I am selling my Tech 2 Clone. This unit includes the Candi interface unit, a 12V cigarette lighter power cord, a 120v power supply, various ODB adapters. etc. This unit will interface with Tahoe, Suburban and Yukon models between 2007 and 2013 and contains GM firmware 33.004. I bought it new...
  2. W

    New Sierra AT4

    When we were young, my wife and I both were avid backpackers. We loved a long hike to one of our favorite campsites at the edge of an Alpine lake. Sometime, a long time ago now, that pastime faded and my wife's idea of camping evolved to a good night's sleep at a hotel like the Ahwahnee. I...
  3. W

    Ethanol percentage flex fuel

    So I had started another thread on my trucks loose gas cap CEL and code and it morphed into a long discussion on Ethanol percentage reporting my the truck and how it seemed to affect the operation of the engine. Until I started fooling around with a few different scan tools, I was never aware...
  4. W

    Serpentine Belt Tensioner

    My belt tensioner and pulley is original and when I had my belt off for my recent alternator swap, I checked all the pulley's and the tensioner pulley bearing was a little rough. I decided to go ahead and replace the tensioner assembly (versus just replacing the pulley), as I thought a new...
  5. W

    Downstream O2 sensor diagnostic

    I thought it makes sense to post another thread as this topic isn't related to the thread P0442 MIL conversation. In doing a live data run looking at my upstream O2 sensor readings for the P0442 thread, I noticed when my engine was warming up, the Bank 2 Sensor 2 reading was stuck down low...
  6. W

    P0442 MIL

    We got up early and drove up into the hills to one of our favorite trails. This trail is about 7 miles total in a loop and we like it on weekends as we rarely see more than a few people on a whole hike. We must have passed 50 people at least. Wow, big holiday weekend, everybody was out...
  7. W

    O2 Sensor Gaskets

    If anyone has a source for the crush washers (I think GM calls them gaskets) that come on OE O2 sensors, I would love to get a link. I replaced my O2 sensors (original to my 2007 Yukon) and after getting everything put away, decided I want to reroute a couple of the connector/wiring bundles. I...
  8. W

    Tech 2

    About 10 days ago I bought a Tech 2 clone from the highest rated Chinese seller I could find on Ebay. The estimate for shipment was an arrival April 2nd. I knew there have been some glitches at the ports in China, largely due to the Chinese just screwing with us, I think, so the long lead...
  9. W

    The indignities...

    The other day I replaced the alternator because the original unit was beginning to really make a ruckus. It seemed a tad weak on charging, but certainly was working. Yesterday I was checking my emissions monitors with my cheapie ODB scanner and noticed the voltage levels seemed pretty low. I...
  10. W

    Range AFM Delete and Emissions

    I realized I had hijacked a thread on Tahoe/Yukon longevity with a complete side track of how the Range device affects emissions testing readiness when it is pulled out before you go in for an emissions test, so I thought I would move things over here (if anyone really cares. ;)). There have...
  11. W

    Front end squeak going over speed bumps

    Just an update, hopefully to save somebody time in debug. I just installed a 1.5" leveling kit in my 2007 Yukon. When I test drove the truck, I noticed going over bumps the front end had a pronounced squeak. It was most loud when I went over speed bumps, when both front wheels went up and...
  12. W

    AFM disabler

    My 2007 Yukon had a low idle miss at 93K miles on the meter. The cylinder with the miss had a really fouled plug. It had been using about a quart of oil every 2K miles or so, which I assumed was worn rings. To diagnose the miss, the dealer started with the PCV, moved to the down rev valve...
  13. W

    Leveling suggestions

    I have a 2007 Yukon SLT (original owner). Lately we have started driving a lot on fire roads and RV trails getting to trail heads we favor. As the roads get more gnarly, I have decided I want to trim the front air dam down to a stub (I have snagged that thing so many times over the years, torn...

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