May-30-2020 01:26 PM
Jun-01-2020 05:49 AM
Question is will there be a noticeable difference in the newer trucks ability to tow?
Jun-01-2020 03:59 AM
APT wrote:
Look for the RPO sticker in your glove box. They are listed in alphabetical order. GU6 is 3.42. GT4 is 3.73. G80 is also a popular one for the locking rear diff. When you go to manual mode, can you select M1 through M6?
May-31-2020 01:35 PM
May-31-2020 09:38 AM
May-31-2020 08:53 AM
APT wrote:
Are you sure your 2013 has 3.73? I thought you could only get 3.42 with the 5.3L and 6-spd?
2014+ GM half tons have slightly more HP. I expect it will feel about the same when towing.
May-31-2020 08:47 AM
May-31-2020 01:38 AM
May-30-2020 05:46 PM
May-30-2020 05:09 PM
KD4UPL wrote:
4.34 gear ratio has to be a typo. What ratio does it really have?
If it's numerically lower than a 3.73 then I would say yes, you will notice a difference towing. It will feel less powerful, not accelerate as well, and be harder to keep the speed under control going downhill. If it is numerically higher than 3.73 it will also be noticeable better in all the aforementioned areas.
May-30-2020 03:23 PM
May-30-2020 02:46 PM
May-30-2020 02:19 PM
wtmtnhiker wrote:
Hi all,
I have a 2013 GMC Sierra with a 5.3 litre engine and 3.73 ratio rear axle. It has about 76k miles. It has a max tow rating of 9500 lbs. I'm looking at buying a 2018 Siverado under 30k miles with a 5.3 litre engine but 4.34 ratio rear axle and a rated towing capacity of 300 lbs less at 9200 lbs. The 2018 has a few nice bells and whistles that I'd like to treat myself to.
May-30-2020 02:09 PM