Giving up with this grinding noise in v4….

[iboughtatahoe23]

Took it in again to the shop that rode with me and heard the noise and they did there little diagnostic or whatever and still can’t figure out what the noise is… the same text I rode with me claims it’s my steering pump, even though he heard the noise, and it only happens during v4 mode.

My steering works just fine. It doesn’t make any noise when I’m turning. So I’m not sure where he got that from. Apparently he thinks the bearing is going out.

That bearing is not what is making noise.
It’s something to do with the lifters and they couldn’t figure it out. I still have a noise and I still don’t 100% know what it is! I’m getting frustrated. This thing has been a money pit

Everyone is all “well has it let you down yet?”

No, not YET.

I have too much money invested to anticipate when it will break down. I think I’m gonna sell it. But it’s like who the hell wants a Tahoe that freaking makes noises? Nobody

 

[swathdiver]

Want to post up a video to youtube and link it here for us to listen?

 

[j91z28d1]

I wasn't going to reply but I will. v4 mode sounds required gm to add an extra muffler/ resignator. if someone cut it off it sounds like a helicopter lol. maybe you just have a exhaust rattle.

as for money pit, how much money have you spent on it?

and if you believe it's the afm issue, delete it like the other 100 threads about afm sounds do.

 

[ctd01]

Took it in again to the shop that rode with me and heard the noise and they did there little diagnostic or whatever and still can’t figure out what the noise is… the same text I rode with me claims it’s my steering pump, even though he heard the noise, and it only happens during v4 mode.

My steering works just fine. It doesn’t make any noise when I’m turning. So I’m not sure where he got that from. Apparently he thinks the bearing is going out.

That bearing is not what is making noise.
It’s something to do with the lifters and they couldn’t figure it out. I still have a noise and I still don’t 100% know what it is! I’m getting frustrated. This thing has been a money pit

Everyone is all “well has it let you down yet?”

No, not YET.

I have too much money invested to anticipate when it will break down. I think I’m gonna sell it. But it’s like who the hell wants a Tahoe that freaking makes noises? Nobody

Yea best to post a video. Are you sure its not a shield rattling? I has one here last week that had a shield rubbing making a noise. Power steering noise wont matter if its in 8 or 4 mode. Pump still spins the same.

 

[strutaeng]

I vote for AFM/DOD delete.

I mean, it seems like that's what you'd want to do if you want your engine to last long anyways.

 

[iboughtatahoe23]

Want to post up a video to youtube and link it here for us to listen?

Ya will post it. Just so everyone knows I meant steering not bearing

 

[iboughtatahoe23]

I vote for AFM/DOD delete.

I mean, it seems like that's what you'd want to do if you want your engine to last long anyways.

Ya I drive it in “M” instead of D and I leave it in 5th so it cuts out 6th gear and disables the AFM, don’t ever use 6th gear in town anyways. I guess if I go on a trip hopefully I have that AFM plug in by then. I can’t afford an actual delete. Might as well take a loan out for that or something if I was gonna do that.

 

[iboughtatahoe23]

Checked the exhaust up and down can’t really see anything out of the ordinary. Looks like a healthy exhaust. I have a leak and can’t even find that. Guess I’ll spray the whole bottom with soap till I find it.

 

[iboughtatahoe23]

Here is the noise

 

[swathdiver]

Ya I drive it in “M” instead of D and I leave it in 5th so it cuts out 6th gear and disables the AFM, don’t ever use 6th gear in town anyways. I guess if I go on a trip hopefully I have that AFM plug in by then. I can’t afford an actual delete. Might as well take a loan out for that or something if I was gonna do that.

My 6-speeds all go into 6th gear by about 40 mph. At 35 mph they stay in 5th. Some are tuned, some not yet tuned.

 

[iamdub]

Here is the noise

That really sounds like something external of the engine. When you checked your exhaust, you mean just visually? Grab a rubber mallet and bump them cats.

 

[Dustin Jackson]

@iboughtatahoe23 I thought you already decided you were going to go with an AFM delete because you found that the problem doesn't happen when AFM isn't used?

 

[iboughtatahoe23]

@iboughtatahoe23 I thought you already decided you were going to go with an AFM delete because you found that the problem doesn't happen when AFM isn't used?

yea but I was trying to figure out exactly what it is. I’m still going for the AFM disabler plug in. I said I wasn’t just gonna throw big money at lifters if it’s possibly not even the lifters. After the recent diag, they just found another issue, they saying my steering pump pulley makes noise or something but it steers just fine. They quoted me $500 for that… and it’s like what? I came here for a totally different issue not related to steering.

 

[iboughtatahoe23]

That really sounds like something external of the engine. When you checked your exhaust, you mean just visually? Grab a rubber mallet and bump them cats.

Ya just visually.

 

[iamdub]

yea but I was trying to figure out exactly what it is. I’m still going for the AFM disabler plug in. I said I wasn’t just gonna throw big money at lifters if it’s possibly not even the lifters. After the recent diag, they just found another issue, they saying my steering pump pulley makes noise or something but it steers just fine. They quoted me $500 for that… and it’s like what? I came here for a totally different issue not related to steering.

This would disable AFM for a fraction of the cost and you wouldn't have to tend to a device occupying your OBD port or possibly having another device drawing battery power when parked.

 

[iboughtatahoe23]

I remember someone recocnending that. However it’s a bit inconvenient to send your PCM to someone as I need my car to get around. It’s my only car. Not to mention the turn around time…

I found a plug in disabler for $80 ‍ has good reviews so it must work.

Also been driving in “M” because it disables AFM.

 

[Dustin Jackson]

@iboughtatahoe23 Ive been thinking about this all day and have been listening to the video of the sound. Certainly a strange sound I’ve never heard anyone complain about.

Does the sound happen when you have the AC turned off?

I agree that it doesn’t seem like the sound is coming from inside the engine. I am not sure what else happens when AFM activates

 

[iboughtatahoe23]

@iboughtatahoe23 Ive been thinking about this all day and have been listening to the video of the sound. Certainly a strange sound I’ve never heard anyone complain about.

Does the sound happen when you have the AC turned off?

I agree that it doesn’t seem like the sound is coming from inside the engine. I am not sure what else happens when AFM activates

I rarely use my AC. I can’t really say.

 

[Dustin Jackson]

@iboughtatahoe23 That probably isn’t the case then. Such a strange sound, very hollow and metallic like a pulley or something

 

[CocobrownLT]

If you can find someone that has a hp tuner. Pay the $100 credit plus what they charge you to do the ten minute job and just disable the AFM. I’ve had it disabled for over two years now.