2019 road noise - TerrainForum.net: GMC Terrain Forum
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post #1 of 18 (permalink) Old 05-20-2019, 05:51 AM Thread Starter
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2019 road noise

My '19 LT, bought in Feb., has terrible road noise, particularly from the rear. I could hardly wait to get out of it after putting 1,000 miles on it this past weekend. My '17 Cruze LT is much quieter and somehow I thought the more-expensive Equinox would be as quiet as the cheaper Cruze. I find it hard-to-believe a product manager signed off on this as acceptable.

Someone on a Chevy forum mentioned putting Dynamat in the spare tire well and getting some improvement. Has anyone done that here?

Thanks!
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post #2 of 18 (permalink) Old 05-20-2019, 09:29 AM
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I would try test driving another for comparison. Maybe it is your tires. I feel mine is very quiet.
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post #3 of 18 (permalink) Old 05-20-2019, 10:35 AM
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Might go to a Harbor Freight and get a couple of the moving blankets, nice and thick, lay in the back and see if it helps insulate the noise. These uni-body SUVs are just noisy seems like, especially down on the southern highways that are really old pavement.
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post #4 of 18 (permalink) Old 05-20-2019, 11:27 AM
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AuditorBill----Keep in mind that the back of the 'Nox that is the "trunk" is open and channels all that road noise into the "cabin" seating area. On the Cruze it was somewhat isolated unless you had the rear seats folded down. I found my old (2014) Malibu was much noisier with seats down while carrying large items. Similarly, my Camaro has increase road noise transmitted forward when the seats are down. As others have mentioned, tires can also make a significant contribution to noise--and it may increase/decrease as you put more miles on the tires. Good luck n isolating to your comfort level. Dynomat may be the solution, but I don't have experience with it in mine.

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post #5 of 18 (permalink) Old 05-20-2019, 05:38 PM
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I used dynamat and dynaliner on a cargo van and the stuff is amazing for quieting a vehicle. Manufacturers use is but only sparingly. It's expensive but it'll make the noisiest vehicles like a cargo van into passenger car quiet.
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post #6 of 18 (permalink) Old 05-20-2019, 09:13 PM
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Originally Posted by AuditorBill View Post
My '19 LT, bought in Feb., has terrible road noise, particularly from the rear. I could hardly wait to get out of it after putting 1,000 miles on it this past weekend. My '17 Cruze LT is much quieter and somehow I thought the more-expensive Equinox would be as quiet as the cheaper Cruze. I find it hard-to-believe a product manager signed off on this as acceptable.



Someone on a Chevy forum mentioned putting Dynamat in the spare tire well and getting some improvement. Has anyone done that here?



Thanks!


i find mine is incredibly noisy compared to my 2015 equinox and 2010 terrain, i have the 18” wheels with michelin tires ... the 19” hankooks don’t seem much different as far as road noise... i think gm just cheaper out on sound deadening in the 3rd generation equinox


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post #7 of 18 (permalink) Old 05-21-2019, 07:24 AM
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I would check the PSI's in your tires.
Especially that it is getting warmer outside.
My '18 thing was serviced back in February and at that time they inflated the tires to 38-39. I had to gradually deflate them to 36, but just yesterday, when the temperature went suddenly up to 90's in the NYC area - the noise returned. The pressure was in low 40's. So I will have to deflate them again or think about some other method, like an alternative gas.
Plus I used my GM Rewards for the retractable cargo cover. It helps somehow. A little bit, but still helps.

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post #8 of 18 (permalink) Old 05-21-2019, 07:02 PM
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Originally Posted by tidji View Post
I would check the PSI's in your tires.
Especially that it is getting warmer outside.
My '18 thing was serviced back in February and at that time they inflated the tires to 38-39. I had to gradually deflate them to 36, but just yesterday, when the temperature went suddenly up to 90's in the NYC area - the noise returned. The pressure was in low 40's. So I will have to deflate them again or think about some other method, like an alternative gas.
Plus I used my GM Rewards for the retractable cargo cover. It helps somehow. A little bit, but still helps.


try having ur tires filled with nitrogen, pressures will vary a lot less with temperature change... most tire shops carry it now days and it’s normally less than $20 to do all 4 tires. u shouldn’t have to manually adjust pressures again it’s recommended when doing so that you set the pressure 2-3 psi higher than what you’d normally set it. the recommended pressure is a “cold “ pressure meaning before the tire heats up and is designed that when the tire is up to operating temperature it will also be at the proper operating pressure. i know with normal air, if my tires are set at 35 psi, after an hour on the highway at 70mph in 80 degree temps they will be at about 39psi the couple mechanics i’ve talked to about this situation say if i run nitrogen to set it around 37psi and it should be good year round and never need touched... which is nice bc over the course of the year temps vary about 100 degrees


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post #9 of 18 (permalink) Old 05-21-2019, 07:55 PM
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Originally Posted by kastner03 View Post
try having ur tires filled with nitrogen, pressures will vary a lot less with temperature change... most tire shops carry it now days and it’s normally less than $20 to do all 4 tires. u shouldn’t have to manually adjust pressures again it’s recommended when doing so that you set the pressure 2-3 psi higher than what you’d normally set it. the recommended pressure is a “cold “ pressure meaning before the tire heats up and is designed that when the tire is up to operating temperature it will also be at the proper operating pressure. i know with normal air, if my tires are set at 35 psi, after an hour on the highway at 70mph in 80 degree temps they will be at about 39psi the couple mechanics i’ve talked to about this situation say if i run nitrogen to set it around 37psi and it should be good year round and never need touched... which is nice bc over the course of the year temps vary about 100 degrees

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Nitro is slightly better than air with psi fluctuations in tires.

Normal air is 78% nitro and the tanks are usually 99% with 0% moisture.

Problem is when you fill a tire with nitro, it still has air and moisture in the tire that you cannot remove. That brings the effective nitro down to where fluctuation will still occur but not to the same extent as only air.

We have a tank on hand for anyone that asks for it. But I refuse to push selling it.

Now - 2018 Equinox 2LT 2.0T AWD
Was - 2015 Equinox 1LT 3.6 AWD
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post #10 of 18 (permalink) Old 05-22-2019, 09:17 AM
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Nitro is slightly better than air with psi fluctuations in tires.

Normal air is 78% nitro and the tanks are usually 99% with 0% moisture.

The only good reason is nitrogen migrate out of rubber less easily than oxygen...thus pure nitrogen will may be make you top tire pressure less ....may be...As you mention ...oxygen is on 16% of air and nitrogen is still 78%.

If you care that you need to top up tire pressure 6 times in a year instead of 5 times..then sure go for nitrogen ...if not then air pumps do fine !

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