2001 Yukon XL SLT 5.3** I installed an aftermarket sub, amp and head unit. Issues with audio no

[Curtis12]

After installing, I’ve had issues with speakers cutting out. The sub still pushes bass notes but nothing from the speakers. If I keep the volume down it works fine. I am wondering if it’s an issue with the factory amp that the speakers are wired through. The way it acts is almost like if I try to pull to much power it shuts down the factory amp and that’s why the speakers cut off. In order to get them to work I need to put the vehicle in park, completely turn it off and open the door (so the head unit turns completely off) and let it sit for 10 seconds or so. When I turn it back on the speakers work again. I’m also running stock alternator.

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

How is the sub amp input connected to the HU output?

 

[Curtis12]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

How is the sub amp input connected to the HU output?

 

[Curtis12]

So the sub and amp aren’t really secured yet but they stay in place fairly well.

 

[Doubeleive]

could be a variety of things or combo of things including
poor ground
not enough power
incorrect wiring
incorrect impendance
short to ground
double check your work
ensure the power wire and grounds are sufficient

cutting off and on typically is incorrect impedance, ground or power issue

 

[Curtis12]

Thank you I will run through it again

 

[Fless]

How's the 5.7 run in that, and who did the swap?

 

[Curtis12]

How's the 5.7 run in that, and who did the swap?

I don’t know much about these trucks, but I don’t believe it was swapped. I bought it from the original owner with 189k on it and honestly it runs great

 

[Fless]

I did not realize that a 2001 could have an OE 5.7L.

 

[iamdub]

I don’t know much about these trucks, but I don’t believe it was swapped. I bought it from the original owner with 189k on it and honestly it runs great

Probably because it's a Gen3 5.3 with 189K and not a Gen2 ("Vortec") 5.7 with 189K.

 

[Curtis12]

How's the 5.7 run in that, and who did the swap?

Correction, it is a 5.3. I just went and took a look

 

[Curtis12]

I did not realize that a 2001 could have an OE 5.7L.

It doesnt, lol i was confused. most definately a 5.3

 

[Mooseman93]

After installing, I’ve had issues with speakers cutting out. The sub still pushes bass notes but nothing from the speakers. If I keep the volume down it works fine. I am wondering if it’s an issue with the factory amp that the speakers are wired through. The way it acts is almost like if I try to pull to much power it shuts down the factory amp and that’s why the speakers cut off. In order to get them to work I need to put the vehicle in park, completely turn it off and open the door (so the head unit turns completely off) and let it sit for 10 seconds or so. When I turn it back on the speakers work again. I’m also running stock alternator.

Let me apologize in advance for the fuzziness of this answer, my hope is that maybe it will point you in the right direction in your search. I have a 2001 Yukon XL 5.3. I've had it for most of but not all of its life. Not too long after I got it, I replaced the factory stereo with an aftermarket HU, no extra amps or speakers, just a basic swap. Now it's been 15 or so years since that happened but I remember there was something really unusual I had to do that was centered around the factory amp. It didn't work somehow with the normal wiring harness, there was a wire to that you had to connect in some other way. Again, fuzzy memory and not a real answer but my point is, I think you're on the right track suspecting the issue originates with the factory amp and how it integrates with the aftermarket parts.

 

[Mooseman93]

After installing, I’ve had issues with speakers cutting out. The sub still pushes bass notes but nothing from the speakers. If I keep the volume down it works fine. I am wondering if it’s an issue with the factory amp that the speakers are wired through. The way it acts is almost like if I try to pull to much power it shuts down the factory amp and that’s why the speakers cut off. In order to get them to work I need to put the vehicle in park, completely turn it off and open the door (so the head unit turns completely off) and let it sit for 10 seconds or so. When I turn it back on the speakers work again. I’m also running stock alternator.

After installing, I’ve had issues with speakers cutting out. The sub still pushes bass notes but nothing from the speakers. If I keep the volume down it works fine. I am wondering if it’s an issue with the factory amp that the speakers are wired through. The way it acts is almost like if I try to pull to much power it shuts down the factory amp and that’s why the speakers cut off. In order to get them to work I need to put the vehicle in park, completely turn it off and open the door (so the head unit turns completely off) and let it sit for 10 seconds or so. When I turn it back on the speakers work again. I’m also running stock alternator.

Expanding on my earlier "fuzzy" post, there is a pink wire in the original harness that powers the factory amp. This seems to get excluded from the aftermarket wiring harnesses, it needs to get 12v. That's what I was referring to. One suggestion was to run the remote turn on from the new stereo to this wire. Regardless, the pink wire to the factory amp needs power unless you're bypassing the amp completely.

 

[Curtis12]

Let me apologize in advance for the fuzziness of this answer, my hope is that maybe it will point you in the right direction in your search. I have a 2001 Yukon XL 5.3. I've had it for most of but not all of its life. Not too long after I got it, I replaced the factory stereo with an aftermarket HU, no extra amps or speakers, just a basic swap. Now it's been 15 or so years since that happened but I remember there was something really unusual I had to do that was centered around the factory amp. It didn't work somehow with the normal wiring harness, there was a wire to that you had to connect in some other way. Again, fuzzy memory and not a real answer but my point is, I think you're on the right track suspecting the issue originates with the factory amp and how it integrates with the aftermarket parts.

Hey I just went and attached the pink wire to power and this seems to have fixed it. Thank you!

 

[Holt50]

Get an high out put alternate do the big three wiring. I ran all new wires for my door speakers straight to the amp so there is no problem

 

[Curtis12]

Get an high out put alternate do the big three wiring. I ran all new wires for my door speakers straight to the amp so there is no problem

That will be the next thing I do.