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Thread: 6.0 Vortec Towing Tune

  1. #11
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    Emissions are NOT measured WOT. To each its own. If it works for you, more power to you. I can tell you. GM didn't make a mistake. The vehicle is calibrated for 87 octane.
    "All that is needed for the triumph of evil is that good men do nothing..."

  2. #12
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    You fail to tell me how a 60 second PE delay is a good thing for towing or in general.
    1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
    1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
    2004 Corvette Z06 with longtubes.

  3. #13
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    Way to 'splain yourself, Lucy. And way to just confuse the OP with contentless posts.
    1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
    1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
    2004 Corvette Z06 with longtubes.

  4. #14
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    Thanks Supercharged111 i appreciate the feedback! I will start messing with those settings. As for the overheating i did install a dual electric fan with smart control to self adjust depending on different scenarios. I also re routed the oil lines to skip the radiator and go to a auxiliary cooler with dual fans and i re routed the transmission oil lines to skip the radiator and go to a auxiliary cooler with dual fans. that helped a ton! I don't have the overheating issues as much now but i don't want the truck to work so hard. Usually when i tow its up hill and of course my truck at 50mph up hill it cant make up its mind which gear it wants to stay in. Basically i want some low end torque to get off the line a little easier and change shift points and PE for the uphill battles.
    03 GMC Sierra 2500HD - LS1b 6.0L Vortec with the 480LE Trans. Mods = Volant Cold Air Intake, Volant Throttle Body Spacer, Pacesetter Headers, Flowmaster High Flow Cats, Magnaflow Muffler and EFILive PCM Tuner.

  5. #15
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    I would have started with a bigger radiator before resorting to the oil and trans coolers, without running those fluids through the radiator you run the risk of overcooling. With stock cooling my trans barely cracks 100 in the winter, unloaded of course. Oil should be 200+ to minimize wear. It'll never hit hard like a big block off the line, but you can make it less bad by bringing the timing in sooner. Instant PE really makes a difference. I have my trucks calibrated to enter PE just before a downshift from OD at highway speeds. If I'm staring at the wideband, I can add throttle until it switches over and know to stop there unless I want a downshift. You can hear the exhaust change note and, when empty, you can feel a difference in power when it hits. It's not like a rocket or anything, but kinda neat nonetheless.
    1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
    1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
    2004 Corvette Z06 with longtubes.

  6. #16
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    You have your user settings to not allow private messages.
    PM me your email

    Sent from my SAMSUNG-SM-G870A using Tapatalk

  7. #17
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    I will fix that!
    but my email is: LDEVERAUX88@GMAIL.COM
    03 GMC Sierra 2500HD - LS1b 6.0L Vortec with the 480LE Trans. Mods = Volant Cold Air Intake, Volant Throttle Body Spacer, Pacesetter Headers, Flowmaster High Flow Cats, Magnaflow Muffler and EFILive PCM Tuner.

  8. #18
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    I Did do the bigger radiator it didn't help so i did the condenser next thinking the fins were clogged and that didn't do it. I flushed all the systems and had the PCM scanned to make sure the parameters were set correctly and they found no issues. I had a cold air at the time and read some reviews and they said that the aluminum intake tube was getting hot and sucking hot air causing the motor to get hotter faster so i put the stock air box back on and did a K&N air filter in it. That didn't do it lol. So finally i did the radiator by pass on oil and trans. the engine gets to 200-210F and never hikes now. The trans. gets up to 275ish on hills so it doesn't over heat now but it is still getting warm. Unfortunately the truck constantly is shifting on inclines so i am assuming thats why it gets so hot? I am hoping that getting a little more torque and changing some shift points that it will eliminate the constant shifting? I am also considering a Cam if this doesn't do the trick.. I never used to have issues towing but this last year has been a little bit of a joke Whats your thoughts?
    03 GMC Sierra 2500HD - LS1b 6.0L Vortec with the 480LE Trans. Mods = Volant Cold Air Intake, Volant Throttle Body Spacer, Pacesetter Headers, Flowmaster High Flow Cats, Magnaflow Muffler and EFILive PCM Tuner.

  9. #19
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    It has been years since I towed with my 04 Escalade but I remember adding a 40,000BTU trans cooler in front of the radiator--removing the dinky cooler that was standard. Also, I remember putting in a Corvette 1/2 shift in place of the truck one, and then tuned it similar to the above recommendations. In the transmission section you could search for all the recommendations from the early 2000-2010 section. The 4L80E was a good trans to work with and would last considerably longer than the 60E trans. As I recall, a few who ran the 80E trans would change some of the gearing in the trans to place the gearing closer together. With the big trans cooler, towing thru the mountains in WVA, NC and Tn my trans temps rarely went above 190deg.

  10. #20
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    Same with mine, just gotta keep the TCC locked and tow/haul does a good job of that. I think I forgot to mention that the 6.0 likes a WOT 5500 RPM shift point as well.
    1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
    1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
    2004 Corvette Z06 with longtubes.

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