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  1. S

    Dealer not honoring warranty work..2018 5.3 Yukon issues

    Is it worth replacing spark plugs and wires? to get to them I need to take wheels off and remove the wheel arc covers. It is still cheaper than trading it in, but in the course of the diagnostics I am already $350+ into it... Any thoughts on this snake oil...
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    Dealer not honoring warranty work..2018 5.3 Yukon issues

    Thank you, @swathdiver appreciate your help. I am posting one more set of logs from today with short and long fuel trims, if you can take a glance at them that would be so helpful. I am running Top-tier gas only from Costco or Shell. Will do the dielectric grease this weekend and also will try...
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    Dealer not honoring warranty work..2018 5.3 Yukon issues

    For the "fun" of it, GM keeps replying with the same canned replies, but this time from their so called escalation email [email protected] but note it is the same person writing who responded earlier with exact same statement. I will trying calling now but from reading, call center will not...
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    Dealer not honoring warranty work..2018 5.3 Yukon issues

    Thank you, I spoke to RPM Motorsports briefly just now, and their answer is that it does not sound right, 11 misfires in <7 minutes, does not sound right. Of course phone diagnostics is not effective they only go by what I describe and what I see on OBD. What puzzles them as well how the...
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    Dealer not honoring warranty work..2018 5.3 Yukon issues

    I stay corrected then. Misfires on the odd cylinders but out of spec measured even cylinders. Now, there is no logic in my finding at all then - bottomline: truck is still rough idling and now even in P both cold and warm.
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    Dealer not honoring warranty work..2018 5.3 Yukon issues

    I would do that. My problem is that I cannot prove anything to the dealer to fix it. Misfires are recorded in OBD monitors on the same bank of cylinders that independent engine mechanic measured injectors being out of spec. There are still no trouble codes anywhere in the system on that. I...
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    Dealer not honoring warranty work..2018 5.3 Yukon issues

    This is what I am seeing on another 7 min ride, looks like Bank 2 is not doing well Cyl #7 is consistently showing misfires
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    Dealer not honoring warranty work..2018 5.3 Yukon issues

    I have tried custom PIDs for GM for injector balance but I am getting all values as zero, OBD Fusion does not see these custom user PIDs, suspect I am doing something wrong. However logs are created now and attached...
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    Dealer not honoring warranty work..2018 5.3 Yukon issues

    Yes imported them, thank you, @Bob2C
  10. S

    Dealer not honoring warranty work..2018 5.3 Yukon issues

    You are a hero @Bob2C ! I will do that too!
  11. S

    Dealer not honoring warranty work..2018 5.3 Yukon issues

    Truth is that RPM Motorsports's is a GM performance shop and the tech who diagnosed the problem is 15+ GM tech at the dealership as master tech, they are readily available to answer any questions, I gave all info to Hendrick GMC and provided all the phones. RPM Motorsports did warm up the truck...
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    Dealer not honoring warranty work..2018 5.3 Yukon issues

    I am in NC, RPM Motorsports in Garner NC are well respected by the GM Corvette and other GM vehicle performance crowd. I took it to them and they found 4 injectors in bank #2 to be out of spec, but I asked them to stop diagnosing as it was on my dime. Entire bank of injectors is most likely not...
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    Dealer not honoring warranty work..2018 5.3 Yukon issues

    BTW, I have run to the end of the rainbow with GM customer support. This message #14 and they are all cookie-cutter the same, we are not interested in helping you... Think before you buy next GM vehicle. When I had an issue with my Lexus 7 years ago, dealership General Manager stopped by my...
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    Dealer not honoring warranty work..2018 5.3 Yukon issues

    Yes, thank you, filed this complaint yesterday with NC DMV. I am taking it to the max level possible, problem is that all complaints are against the dealer but Hendrick GMC blames GM, saying GM tells to stop testing once there are no codes for the car... Rough idle that is documented by two...
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    Dealer not honoring warranty work..2018 5.3 Yukon issues

    I did talk to the lemon law attorney, I bought this car as GM company car (ironically) it was titled to GM before me for 4 months. Apparently in pro-business NC it disqualifies me from lemon law claim. I think GM and dealers know that and that is why they are not concerned. This is what Hendrick...
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    Dealer not honoring warranty work..2018 5.3 Yukon issues

    What everyone on GM side fails to see - why would I be spending 5+ days of PTO and $300+ of my money trying to solve the problem if my truck was perfect, the most precious asset is time. If I did not have the problem, I would not waste my time sitting at dealerships, on the phone, and driving to...
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    Dealer not honoring warranty work..2018 5.3 Yukon issues

    Thanks, did you mean file with BBB for GM or for the dealer. I filed for the dealer, but dealer responded to BBB saying, we did everything by GM manuals, no issues found.
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    Dealer not honoring warranty work..2018 5.3 Yukon issues

    Thank you for posting. I will find out exactly, RPM Motorsports are heavily invested in the GM tools for engines and transmissions as they are high performance tuning for GM vehicles. RPM Technician mentioned that AFIT was an older way of measuring it, GM now uses a new tool (name escapes me at...
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    Dealer not honoring warranty work..2018 5.3 Yukon issues

    To be clear that response was from an independent performance shop, they happen to work on GM exclusively but they are not affiliated with GM in that sense. I actually was appreciative that they explained that to me. If Blackbear can prove it otherwise that would be fantastic. Tune may or may...
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    Dealer not honoring warranty work..2018 5.3 Yukon issues

    I do think it is more than injectors, as all 4 are out of spec, I have asked RPM Motorsports to stop troubleshooting as this is on my dime, I am already $350 into diagnostics and rentals while truck is in warranty, 8 months old with 9,000 miles on it.
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    Dealer not honoring warranty work..2018 5.3 Yukon issues

    I do get it very rough at the stop in D or R, in P it is still there but almost not noticeable but defiantly there.
  22. S

    Dealer not honoring warranty work..2018 5.3 Yukon issues

    I almost did the tune... but glad that independent shop explained to me the ECM module gets a mark every time it is flashed and GM knows how many flashes GM authorized, and if there are extra that they did not, they will send you packing on the warranty claim. It speaks to the integrity of this...
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    Dealer not honoring warranty work..2018 5.3 Yukon issues

    Yes, the mechanic worked at GM for many years as a master mechanic and now works on GM trucks and motors exclusively for performance and regular repairs, he is ASE certified and RPM Motorsports has huge respect among GM owners in the NC including Corvette owners. Mount replacement was tried by...
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    Dealer not honoring warranty work..2018 5.3 Yukon issues

    Thanks for that, I have heard only good things about this dealership, this is encouraging. I might end up taking the truck there as Hendrick, Thompson are disgrace to the automotive profession. Especially Hendrick in Durham.
  25. S

    Dealer not honoring warranty work..2018 5.3 Yukon issues

    Who is the GM rep and how do I get a hold of one. I reached out to [email protected] and [email protected], they have been giving me runaround "dealer will take care of you... if there is a problem". I suspect I need a real GM rep but how do I get in touch with one? [email protected] told...

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