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Common problem or being fed bull crap?


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I recently bought a 2018 chevy Silverado 1500 
5.3L 2x2 double cab brand new. I bought it with 
the intent of pulling an older two horse straight 
load that when empty weights 1000 pounds (yes 
it’s been on a scale). The horse that goes in it 
weight 970 pounds (same, he’s also been on a 
scale lol) and with tack we’ll say the total weight is 
3k lbs on a fat day. My issue is, when pulling a 
trailer, and I mean any trailer including the sketchy 
5’x9’ uhaul flat beds, at certain points it will start 
making a noise. I can’t pinpoint where the noise is 
coming from and it usually happens while cruising 
between 55-65mph. It sounds like you’re driving 
on the rumble pad on the side of the road and on 
occasion will also feel the same way. This happens 
with an empty trailer and loaded trailer, but not 
consistently. It has been into the dealership twice 
now and while they’ve replaced the air box and an 
exhaust valve they are trying to tell me that it’s a 
normal and common sound and problem, and it’s 
the ergonomics. I know several people who own 
Chevy trucks and none of them have ever 
encountered this.  So my questions. Is this a 
common problem anyone else has experienced? If 
so, what was it? Are they trying to blow me off and 
blow smoke up the pipe? Any help would be 
greatly appreciated as I’m deciding how I need to 
proceed.

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6 minutes ago, Princesspeep21 said:

I recently bought a 2018 chevy Silverado 1500 
5.3L 2x2 double cab brand new. I bought it with 
the intent of pulling an older two horse straight 
load that when empty weights 1000 pounds (yes 
it’s been on a scale). The horse that goes in it 
weight 970 pounds (same, he’s also been on a 
scale lol) and with tack we’ll say the total weight is 
3k lbs on a fat day. My issue is, when pulling a 
trailer, and I mean any trailer including the sketchy 
5’x9’ uhaul flat beds, at certain points it will start 
making a noise. I can’t pinpoint where the noise is 
coming from and it usually happens while cruising 
between 55-65mph. It sounds like you’re driving 
on the rumble pad on the side of the road and on 
occasion will also feel the same way. This happens 
with an empty trailer and loaded trailer, but not 
consistently. It has been into the dealership twice 
now and while they’ve replaced the air box and an 
exhaust valve they are trying to tell me that it’s a 
normal and common sound and problem, and it’s 
the ergonomics. I know several people who own 
Chevy trucks and none of them have ever 
encountered this.  So my questions. Is this a 
common problem anyone else has experienced? If 
so, what was it? Are they trying to blow me off and 
blow smoke up the pipe? Any help would be 
greatly appreciated as I’m deciding how I need to 
proceed.

Watch to see if it happens when the AFM switches to V4.  What you're describing kind of sounds like the exhaust drone.  I've had a 2014 and a 2018 and it's much more pronounced in the 2018 than it was in the 2014.

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Sounds like what a lot of people describe when the torque converter is bad. GM used to recommend a double or triple tranny flush, but now they said there is a new fix that was supposed to be available last month but everyone is still waiting to see what that “fix” is.

do you have the 8 or 6 speed?

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It’s an 8. I believe it happens in v8 mode. Usually when it happens it catches me off guard and I check the trailer first then my other gauges. If it’s exhaust drone would it happen intermittently? I’ve never had a problem like this before but this is also the first Chevy I’ve owned. 

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I recently bought a 2018 chevy Silverado 1500 
5.3L 2x2 double cab brand new. I bought it with 
the intent of pulling an older two horse straight 
load that when empty weights 1000 pounds (yes 
it’s been on a scale). The horse that goes in it 
weight 970 pounds (same, he’s also been on a 
scale lol) and with tack we’ll say the total weight is 
3k lbs on a fat day. My issue is, when pulling a 
trailer, and I mean any trailer including the sketchy 
5’x9’ uhaul flat beds, at certain points it will start 
making a noise. I can’t pinpoint where the noise is 
coming from and it usually happens while cruising 
between 55-65mph. It sounds like you’re driving 
on the rumble pad on the side of the road and on 
occasion will also feel the same way. This happens 
with an empty trailer and loaded trailer, but not 
consistently. It has been into the dealership twice 
now and while they’ve replaced the air box and an 
exhaust valve they are trying to tell me that it’s a 
normal and common sound and problem, and it’s 
the ergonomics. I know several people who own 
Chevy trucks and none of them have ever 
encountered this.  So my questions. Is this a 
common problem anyone else has experienced? If 
so, what was it? Are they trying to blow me off and 
blow smoke up the pipe? Any help would be 
greatly appreciated as I’m deciding how I need to 
proceed.
What they have done is beat the lemon law. Long as they make an effort to repair they can have a good chance of keeping you stuck with that truck in court.
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Long term fix is better ATF. 

Quote

 


Fluid Exchange

The TCC shudder condition is related to moisture content in the transmission fluid. The current fluid tends to be hydroscopic, or absorbs moisture, which increases the chance of TCC shudder. There are three different fluid exchange procedures to follow, depending on vehicle application, so that an acceptable concentration of the new HP fluid is achieved in the transmission.


 

 

Edited by elcamino
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I assume you have tow haul on..  It sounds like you are hearing the V4 drone.  I hear it with my smaller flatbed trailer on but the travel trailer is heavy so I only ever here it wend going down hill. The engine braking is much louder.

 

Don't get an intake the drone is louder without the factory intake on.

 

I have an intake so it just ignore It.

 

You can get a range device to disable AFM..  don't need it on all of the time you can just put it on to tow.

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12 hours ago, Princesspeep21 said:

If it’s exhaust drone would it happen intermittently?

Yes if it’s only happening in V4 mode. There’s a flapper in the exhaust that opens and closes with back flow pressure. The test to see if it’s what you’re hearing is drive in M7 while towing your trailer at the speed you here the noise. M7 will keep the truck out of V4. The other test would be to use a hose clamp and clamp the valve open then see if it changes or eliminates the noise pulling the trailer. You said they changed a exhaust valve? Is this what they changed? If so probably not your problem.

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  • 9 months later...

This is crazy!!  Back in the day- - - before computers and such, I was pulling my horse trailer with my roping horse inside of it.  Just went to dual exhausts on my 1969 F-100 (390 ci & C-6 Tranny)  Taylor Bo (Horse's name)  was going crazy in the trailer and he never did that before.  I didn't know what was going on..  A friend told me to ride in the trailer while someone else was driving to see what his problem was, yup, it was the exhaust noise.  Ended up running the pipes out to the side in front of the rear wheels.  

Want to know how your horse rides in a regular trailer, just ride in it while someone else drives.  Guarantee you will change your driving!  

 

Edited by Chicken Heart
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