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Z71 tOWING

This is a discussion on Z71 tOWING within the Technical / Maintenance forums, part of the General Discussion category; Hello, Just got a 2003 GMC Z71,1500 5.3L Auto. How do these tow? I will be towing a car trailer/race ...

  1. #1
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    Z71 tOWING


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    Hello,
    Just got a 2003 GMC Z71,1500 5.3L Auto. How do these tow?
    I will be towing a car trailer/race car on occasions.
    Any recommendations on Better braking, computer chip etc or is it fine in its stock form.
    Thanks,
    WRZ71

  2. #2
    Good 'ol Boy
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    One peice of advice I have to offer you is to make sure that you don't do any heavy towing in OD.
    1976 Chevy K10: not stock
    1998 Chevy Silverado EC: bone stock

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    What happens if I run it in overdrive?? Let me know where I can go to get more info?

    Do these trucks also have some type of a limiter on them?

    The truck does fine up to 100MPH then it acts like it wont go any faster. Feels like a speed limiter.

    Thanks,
    WRZ71

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    Z71 towing

    What kind of race car are you towing? Drag or oval track?
    If it's big, then mob it...if it's fast,then drag it...its the simple rules of life.

  5. #5
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    Originally posted by WRZ71
    What happens if I run it in overdrive?? Let me know where I can go to get more info?

    Do these trucks also have some type of a limiter on them?

    The truck does fine up to 100MPH then it acts like it wont go any faster. Feels like a speed limiter.

    Thanks,
    WRZ71
    Yes there is a speed limiter - all vehicles have one these days and they generally cut off around 100-125mph. Its not like you need to be doing 100 with a trailer in tow anyway.

    the truck will tow your load just fine in stock form. There are a wide array of add ons you could instal to help performance. trailer brakes would certainly help in the slowing down dept.

    OD shouldnt be used to tow because the tranny will constantly be shifting in and out of OD as it tries to maintain speed, creating heat. This is more of a concern if you are pulling through hilly terrain.

  6. #6
    Wal-mart Sucks Timberwolve81's Avatar
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    another smart invested would be a tranny cooler, the cooler you keep the tranny fluid the happier it will be.

    also, use the tow/haul button. It changes your shift points and makes it easier on your tranny while towing.


    Jake

    1991 GMC 1500, 4X4, short bed, 5.7 liter, 4L60, BF Goodrich T/A KO 265/75R16, K&N air filter, Flowmaster

  7. #7
    Registered User jebx's Avatar
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    BTW, your truck is a Sierra not a "Z71". That is only an suspention package (shocks, skidplates, and stickers). (Sorry, pet peeve)

    As for your question....

    #1 do a search and you will find a wealth of information.
    http://www.fullsizechevy.com/forum/s...owing+capacity
    http://www.fullsizechevy.com/forum/s...owing+capacity
    http://www.fullsizechevy.com/forum/s...owing+capacity
    http://www.fullsizechevy.com/forum/s...owing+capacity
    http://www.fullsizechevy.com/forum/s...owing+capacity

    #2 http://www.gmcanada.com/english/truc..._capacity.html
    That website has the math for figuring out your towing & payload capacity.

    #3
    Quoting '01 manual:
    "If you have an automatic transmission, you can
    tow in DRIVE (D). You may want to shift the
    transmission to THIRD (3) or, if necessary, a lower
    gear selection if the transmission shifts too often
    (e.g., under heavy loads and/or hilly conditions).
    If you have a manual transmission and you are
    towing a trailer, it’s better not to use FIFTH (5)
    gear. Just drive in FOURTH (4) gear (or, as you
    need to, a lower gear). See “Tow/Haul Mode”
    in the Index."

    2001 RCLB Silverado 4x4 4.8L - Dynomax cat back - K&N FIPK

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    i would recommend the electric fan upgrade. it will keep your tranny fluid much cooler for those uphill 100 mph bursts with full trailor load.

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    Thanks for the Replys,

    Yes there is a speed limiter - all vehicles have one these days and they generally cut off around 100-125mph. Its not like you need to be doing 100 with a trailer in tow anyway.

    No I wasnt actually towing the trailer going 100MPH. I am lucky to go over 65. I keep it safe on the road, then go Balls out on the track.

    What kind of race car are you towing? Drag or oval track?

    The car is an Enduro oval track car in Northern California.

    BTW, your truck is a Sierra not a "Z71". That is only an suspention package (shocks, skidplates, and stickers). (Sorry, pet peeve)

    I guess I couldn't get that one by you! I believe it is a $400 option on the Sierra. We could start a good debate on this forum deciding what it is you actually get for the $400. That will be another post.


    Great Forum!
    WRZ71

  10. #10
    Registered User jebx's Avatar
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    Originally posted by WRZ71

    I guess I couldn't get that one by you! I believe it is a $400 option on the Sierra. We could start a good debate on this forum deciding what it is you actually get for the $400. That will be another post.
    Although, general public belives it something so in resale I think it might be helpful.


    FYI
    http://www.fullsizechevy.com/forum/s...hlight=z71+rpo
    http://www.fullsizechevy.com/forum/s...hlight=z71+rpo

  11. #11
    Titties and beer bradz71's Avatar
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    It is recommended that you install trailer brakes if you load is over 1000 lbs or more. I do alot of towing and it really makes a difference. And it might save your a$$. Other than that I always run out of OD whenever I tow anything over 1000 lbs.
    2012 3500HD
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  12. #12
    Refinery Firefighter SWLA-Z71's Avatar
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    I haul a 4500 lb tractor and trailer with mine and it is stock. No problems. Just take your time. I do have trailer brakes though.

    Also, the suspension is a little weak so you might consider throwing some air bags on the rear. It will make the ride a lot better.
    2000 Chevy 1500 Z-71 Ext Cab
    5.3 L Vortec / 100,000 plus miles

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    Along the same lines, Im going to be towing a boat thats prob more than 1000lbs down I95 all the way to the Florida Keys from NC. Should I turn on the Tow/Haul mode for the trip down or should I leave that little button alone. Truck is in the sig. Thanks fellas!
    2001 GMC Sierra 1500 5.3L SLT Ext Cab Short Box Z71
    w/ Flowmaster delta 50 muffler and chrome tip dual exhaust out the back, K&N air filter, Edelbrock ceramic coated shorty headers (edl-65002)

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    1000lbs??? - you'll hardly know its back there

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    Towing

    If you have factory tow pkg. with the 3.73 or 4.10 and with electric brake control you should have no problem. I tow a 6,000 lb. camper with my 02 4.8 and it does just fine, but I also use the Superchip towing program, use the tow/haul feature.
    Dave
    02 Silverado Ext. 4X4,4.8,UPD,Flowmaster,Superchip
    01 Mustang Gt Conv. Superchip

  16. #16
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    Yea but its down the interstate doing 70 or so. The trailer does not have any sort of brakes on it at all.
    2001 GMC Sierra 1500 5.3L SLT Ext Cab Short Box Z71
    w/ Flowmaster delta 50 muffler and chrome tip dual exhaust out the back, K&N air filter, Edelbrock ceramic coated shorty headers (edl-65002)

  17. #17
    Registered User jebx's Avatar
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    You are fine with 1000 Lbs. You don't need brakes. People tow that kind of weight all the time, including my self. My boat is about that much and so are a couple snowmobiles. No worries.

    2001 RCLB Silverado 4x4 4.8L - Dynomax cat back - K&N FIPK

 

 

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