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Type: Posts; User: SixSpeed

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  1. I wish the repository worked, would love to have...

    I wish the repository worked, would love to have more vehicles to browse and be able to upload.
  2. I will say the 2500 Suburban's always seem to...

    I will say the 2500 Suburban's always seem to have oddities about them. They tend to get a lot of leftovers and hand-me-downs since they were low production, I guess.

    Attached are the stock tunes...
  3. Thanks for the input, I guess I have been a...

    Thanks for the input, I guess I have been a little confused because I have read about 08/09 differences, but I also have a 2011 Suburban 2500 and it still has (uses?) the desired shift times, inertia...
  4. Late 6L90 changes, no Desired shift time or inertial adder? GM Updates?

    Hey Guys,

    I have an '08 Suburban 2500 (LY6/6L90) that frankly, I hate, hate, the way this thing shifts. Stock was awful, horrible. I am not good with A6's and its still awful and horrible...
  5. Bump, anyone able to help? HP Tuner support...

    Bump, anyone able to help? HP Tuner support hasn't gotten back to me. :(
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    I swapped the O2 sensors and I have the same...

    I swapped the O2 sensors and I have the same results. Same scenario, when the pedal is lifted and coasting tends to aggrevate it.

    Here is the log file, starts to go wonky around 9:15 (Sorry for...
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    Thanks for the input! I will see about swapping...

    Thanks for the input! I will see about swapping the 02's to see if the code chases it. I am not sure why there is so much KR, it's all stock
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    Stock '07 Yukon LTFT B1 High - B1 Lean Help

    Hey Guys,

    I am trying to help my neighbor out with their vehicle and while driving it I noticed there is something up with the fuel trims. Stock vehicle, stock tune. 2007 Yukon 5.3.

    ...
  9. Update, messed with the truck today. I am mxed...

    Update, messed with the truck today. I am mxed out on the trans revs/mile, ratio and VSS pulses/mile. Still need some more, anyone have any ideas? I'm not 100% sure on the PCM output calibration's...
  10. Tire/Gear Limits? Modification for DEEP gears/tall tires.

    Hey Guys,

    My neigbor (sucker me) has a 2002 Yukon (5.3 2wd) mud truck running a divorced SCS transfer case (3:1) and rockwell axles (6.72 gears) on 49" tires. Needless to say the speedometer...
  11. Bringing this thread back, there seems to be very...

    Bringing this thread back, there seems to be very little information on swapping to electric fans on the GMT900 trucks since most trucks came with them with the exception of heavy duty gas trucks. I...
  12. I have been playing around with this a little as...

    I have been playing around with this a little as well, I plan to give it another go soon. I am wondering if it doesn't reference that 0% throttle column or something.
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    Electric Fan Running Conditions

    Hey Guys,

    I have done factory E-Fan swaps on a few of my SUV's, and have been happy with the results, but I am curious about the "Running Conditions". It is set at 0 from the factory. I am...
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    I have the PCM of NC E-Fan conversion on the...

    I have the PCM of NC E-Fan conversion on the truck, didn't occur it could be the cluster itself throwing the warning lights. I know I can change the transmission overtemperature setting but didn't...
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    Engine Overtemperature Degree Change?

    Hey Guys,


    Was driving my 2002 Suburban up a steep mountain road and I developed a engine fan failure, and I noticed the temp warnings for engine coolant were pretty high. I think maybe...
  16. Tuned with old Jet Performance Module? Help Needed

    Hey Guys,

    I am new to HPtuners, I have been messing around a little bit with my 2002 Suburban 2500 (6.0L) the last week, playing with the tune. Well, I ran into a road block and I am stumped...
  17. 4L80E Downshift Tuning For Towing? (Engine Braking/Grade Shifting)

    Hey Guys,

    New to the HPTuners world, having a great time with it so far, but I had a question. I was wondering if it were possible to program the vehicle (2002 Suburban 2500, 6.0L, 4l80E) to...
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