Squeak when throttle is applied

Jeremy Ecker · May 9, 2015

So my father has the EXACT same truck as me. I drove it today and it is totally a different feel. No squeak, and seems to have a lot better acceleration and not as much transmission and throttle lag. Wtf?

Isriam · May 10, 2015

Jeremy, clamp the valve open on your exhaust and go for a drive and see if the squeak is gone.

Jeremy Ecker · May 10, 2015

I just noticed one difference between my dads truck and mine. I have the 3.08 rear axle and he has the 3.42. Could that make any sort of huge difference?

GMCustomerService · May 11, 2015

With all due respect Patsy G, the dealers aren't helpful at all. I've already refunded my extended warranty because they won't fix anything on my truck unless it's on fire and shooting fireworks into the sky. I've paid out of pocket to fix things they wouldn't. Warranty means nothing.

Hey Kev,

We regret hearing you feel this way and apologize for any negative experience at the dealership. Again, feel free to send us the requested information via private message if you'd like for us to follow up on your behalf. We're happy to assist any way we can.

Sincerely,

Eddie A.

GM Customer Care

brwk · May 11, 2015

I also have the exact same noise. The Dealer will replace your cat back however if it starts making the noise again.....too bad. I think I will try a clamp first. Only issue with the clamp is a possible drone when in V4. And I hate drone.

stevev · May 12, 2015

clamping it will get rid of the squeak, but yeah you'll get a slight drone when cruising in V4 mode. I clamped mine all of this past winter, but recently took the clamp off. Of course the squeak is now back and I was trying to spray some lubricant in there but it doesn't seem to help.

kevaviation30 · May 12, 2015

this issue just started for me recently. Didn't hear it at all last summer. The afm will probably go out in high mileage anyway, as with the radio screen, and other "programmed" features. Would it changed mpg or pick up? Or affect anything really?

If clamped

Johndevil · May 13, 2015

My 2014 GMC Sierra All terrain 5.3 Squeaks. At first I thought it was a vacuum hose or something but this makes more sense.

Ill be contacting my dealership when I return home.

Rme2513 · June 4, 2015

My 6.2 dose the same thing and ONLY does is going from v4 to v8 so is it the flaper or something todo with the AFM ??

brwk · June 4, 2015

Its the Flapper.

Rme2513 · June 4, 2015

Its the Flapper.

ok thanks glad to hear that is all it is

BuiltFlintTough · June 11, 2015

Dealership told me "posible solenoid" but did they attempt to fix it? No.

Rme2513 · June 13, 2015

Dealership told me "posible solenoid" but did they attempt to fix it? No.

solenoid to what AFM ???

Wade Leveille · June 14, 2015

So I purchased this Siverardo back in April of this year. It now has just over 2k miles on it. This truck had the crossover pipe replaced when I purchased it because I found a crack in the pipe where the factory tooling flattens it.

For what it's worth, I have this "Chirp" as you say, but I hear it as a "Ching" sound also. It happens always when I allow it to coast a bit then hit the accellerator. I also hear a lot of rattles coming from that area mostly on cold start-up and then it dissapates a little.

I brought it to the dealer here in Massachusetts. I gave them a typed paper explaining all my concerns. They printed out a couple of reports and told me it was normal noise.. It's very annoying.

They did take care of the 70mph vibration but these driving sounds and noise are bad also... This dealership has seen me alot, but hey, I just took out a mortgage on a truck and I think the issues should be taking care of.

One thing I also tried, because of my prior experience as an auto mechanic, was having someone hold their hand over the tailpipe with a rag.. You can definately hear leaks up there... Anyone else hear this? I was wondering if this could also be linked to the strange noise I hear when traveling down the road in the left lane, say against a road partition... Strange sounds being bounced back...

kevaviation30 · June 16, 2015

Mine just started this a couple months ago. Would greasing the flapper or even partially keeping it open help. A louder exhaust would eliminate the noise I assume?