2012 Chevrolet Traverse AWD engine hesitates, dash lights flash, radio goes out

Joshua Service Manager Michigan Posted   Latest   Edited  
Unsolved
Driveability
2012 Chevrolet Traverse LTZ 3.6L (D LLT) 6-spd (6T75)
Engine Hesitates
Dash Lights Flash
Radio Turns Off

2012 Chevrolet Traverse LTZ AWD 140k Engine was installed with new timing chains around 20k miles ago. I've done the following 

  • Spark Plugs
  • Struts
  • Power Steering Pump
  • Serpentine Belt
  • Transmission Fluid
  • Alternator
  • Blend Door Actuator
  • Motor Mount 

Now just recently when driving it the rear end of the kind of moves off to the side. I realized the rear end was going out because the front wheels and right rear wheel was moving but the left rear wasn't. Did more of inspection and the rear end was toast, so I replaced the rear end with one with 90k miles and replaced the seals/fluid as well. I get back to the car and when driving it will randomly hesitate to go and all of the dash lights come on and the radio shuts off! But then you can turn the car off and restart it and it's fine. 

I later noticed when I had all things going on the car with Ac,Lights, Radio ect I noticed the battery voltage was very low so I assumed it was the alternator doing it so I replaced the alternator again and seemed to of fixed the issue but now it's still having the similar problem of it kind of dying and it hesitates to move and all the lights come on the dash and the radio turns off. 

Then every time you cut the car off the radio goes off and has to power back on every time and get in and when turning the car off and rolling up the windows the key has to be turned didn't have to do this before to turn the car off and still be able to roll the windows up and the radio would stay on. I just installed a new rear differential because the left wheel was locking up. I also just installed a new alternator So I'm not sure if you've ever ran into a Traverse-Enclave-Outlook-Acadia ever randomly hesitating and then all the dash lights flash and the radio cuts out and then you can turn the car off then restart it and it's fine but will keep randomly doing it. 

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David Owner/Technician
Alberta
David
 

Sure sounds like a bad connection. Check the fuse box under the dash above the passenger foot well. Take it right out and look for corrosion where the harness connections go on. A little leak from the windshield seal is common on those units. I cannot resist asking how you felt after changing out the 2nd alternator without testing it though? Hope you are getting supplied with good quality units.

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Joshua Service Manager
Michigan
Joshua
 

I forgot to add that the first time I replaced the alternator it was clearly bad. It died in the middle of the road and when starting it made a terrible noise coming from the alternator so I replaced it. The 2nd time I tested the alternator and was bad but wasn't making noise. The first alternator I ordered online for the customer she wanted it cheap so yeah.. But I will look under the dash from…

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Elon Owner/Technician
North Carolina
Elon
 

As already stated check the fuse box under right hand side of dash for water intrusion. Especially if it has a sunroof.

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Saul Diagnostician
Texas
Saul
 

Check the grounds too. I had a Silverado that was doing something similar after replacing the engine, one of the main grounds was not bolted to the correct location.

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Dwight Owner/Technician
California
Dwight
 

In addition, check all grounds. Make sure the battery is in good shape.

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Danny Technician
Wisconsin
Danny
 

Are the battery terminals tight?

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Robert Mobile Technician
Michigan
Robert
 

As stated. Check for loose connections such as the PDC or grounds. I have experienced a few issues from other shops installing motors that they didn't tightren the ground on the back of the cylinder head on the rear bank. Ensure it is tight physically.

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Robert Technician
Michigan
Robert
 

Is the ignition switch good

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Darren Owner/Technician
Arkansas
Darren
 

You didn't post a vin so this may or may not apply to your problem but.. GM has a problem with the routing of the grounds on the left side of the driver footwell kick panel on certain model suv's of this vintage. There are a couple of ground wires behind the carpet that get hit regularly by the left toe. This causes the wire to move and break internally at the eyelet while keeping the…

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Alexander Diagnostician
New Jersey
Alexander
 

Also you might want to check the fuse box And distribution blocks screws. if this has the clips type of Connectors that get secured by them.

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Joshua Service Manager
Michigan
Joshua
 

1GNKVLED8CJ193818

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Joshua Service Manager
Michigan
Joshua
 

Ended up being a ground wire thanks everyone.

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