Q: Poor charging after replacing alternator - why? 2007 ChevySuburban

asked by on

Alternator went out. I bought and installed the new alternator and now all of the lights on the vehicle pulsate when at an idle or driving. Shut the vehicle off but leave the lights on and it stops. I replaced the battery as well. When driving the battery meter on the dash will be at about 14v and drop to 10v and go back to 14v. Is the alternator the problem or is it possible the ecu or the bcu may have been damaged or maybe I've got the belt to tight/loose. I had messed with the tensionor a bit unintentionally when taking the belt off. First alternator job and I messed with the wrong part. It's getting annoying and kind of embarrassing when you're driving at night and people keep flashing their high beams at you because they think I'm flashing them! Haha

My car has 235453 miles.
My car has an automatic transmission.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Poor charging after replacing alternator - why? 2007 ChevySuburban

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: What does it mean when your charging system failure light comes on out of no where while driving?

Claimed by Tim J. Wolf

Q: My Lumina 2001 turns off while driving 2001 Chevrolet Lumina

When the engine is not starting you will need to check and see if you hear the fuel pump run when you turn on the key on and off? If you do not hear the pump then you most likely...

Q: grinding noise while turning right or driving straight

Hello. If the noise is still there when the engine is off and if you are not turning the wheel, then it is typically either a failing bearing in the rear differential or it can be a failure in the...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...