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Alternator Replacement?

Tiny
DAVE D
  • MEMBER
  • 2005 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 140,000 MILES
The alternator is making noise which was determined to be the rear bearing. A new alternator is $250 +/-. Would replacing the bearings be more practical? If so, are there any special concerns?
Thursday, December 9th, 2010 AT 2:52 PM

18 Replies

Tiny
BUDDYCRAIGG
  • MECHANIC
  • 2,262 POSTS
Hello,

Its best to get a rebuilt AC Delco unit here is a guide to help you with the replacement and instructions in the diagrams below to help you on you car.

https://www.2carpros.com/articles/how-to-replace-an-alternator

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Tuesday, December 18th, 2018 AT 12:11 PM
Tiny
MB1088
  • MEMBER
  • 1 POST
  • 2004 CHEVROLET TAHOE
  • V8
  • 2WD
  • AUTOMATIC
  • 14,286 MILES
Which altenator does my vehicle use? The 105 amp at 11:30 or the 145 amp at 12:00?
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Wednesday, July 1st, 2020 AT 2:49 PM (Merged)
Tiny
DR LOOT
  • MECHANIC
  • 2,311 POSTS
That depends on how fancy your Tahoe is, if it is fully loaded with all the accessories then it will use the 145 amp. If you clean off your alternator you will find the amperage stamped on it.
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Wednesday, July 1st, 2020 AT 2:49 PM (Merged)
Tiny
ROOKIE_911
  • MEMBER
  • 1 POST
  • CHEVROLET TAHOE
I need to replace the alternator on a 2003 tahoe 4x4 95k and I can remove two of the mounting bolts for the alternator but how do I get the tension off? Is there another place I should be looking the two bolts I can remove are simple to get to. Thanks for the help!
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Wednesday, July 1st, 2020 AT 2:50 PM (Merged)
Tiny
LEB
  • MEMBER
  • 45 POSTS
There is a belt tensioning pulley (on the opposite side of the engine at least on my 96 and 97). The parts store where you purchased the alternator should have the tool that let's you move this easily.
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Wednesday, July 1st, 2020 AT 2:50 PM (Merged)
Tiny
MOLINSKY
  • MEMBER
  • 1 POST
  • 2001 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
I am trying to replace the alternator but I can't locate the belt tensioner. Where is it on this vehicle?
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Wednesday, July 1st, 2020 AT 2:50 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
https://www.2carpros.com/images/external/89196146.gif
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Wednesday, July 1st, 2020 AT 2:50 PM (Merged)
Tiny
ANT33
  • MEMBER
  • 1 POST
  • 1999 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 71,200 MILES
Yesterday I was driving my Tahoe and it cut off and would not start until we jumped it off. When it did start back up the battery meter showed that my battery was fully charged. The battery is two months old, the starter has been replaced a year ago, and the alternator is about 3 years old. I do not know what is causing this.
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Wednesday, July 1st, 2020 AT 2:50 PM (Merged)
Tiny
RHALL77
  • MECHANIC
  • 3,361 POSTS
Did you load test the battery. Do you know what the voltage output of the alternator is
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Wednesday, July 1st, 2020 AT 2:50 PM (Merged)
Tiny
ANTHONY.NESBITT1
  • MEMBER
  • 1 POST
  • 1999 CHEVROLET TAHOE
  • V8
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
How do I remove my alternator?
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Wednesday, July 1st, 2020 AT 2:50 PM (Merged)
Tiny
OBXAUTOMEDIC
  • MECHANIC
  • 3,711 POSTS
Hi Anthony,

First you will need to disconnect the Negative Battery Terminal. Then remove the Belt. You will then need to remove components as needed to gain access to the Alternator. Then remove all electrical connections on the Alternator. Then remove all bolts and nut holding the alternator in place. You may need to remove the brackets holding the alternator to remove it.

.
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Wednesday, July 1st, 2020 AT 2:50 PM (Merged)
Tiny
PEAR69
  • MECHANIC
  • 1,482 POSTS
Remove the wires as described. There are just two long bolts holding the alternator. Remove them and CAREFULLY pry the alternator out. I know - it's in there tight - so pry on oit easy. It is sometimes usefull to have the new part ready to install so you can see where mounting bolts are. On your alternator there is NO belt tension adjustment to be done with the alternator.
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Wednesday, July 1st, 2020 AT 2:50 PM (Merged)
Tiny
MIKKISTUFF
  • MEMBER
  • 1 POST
  • 1999 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
How do I remove the alternator from 1999 Chevrolet Tahoe?
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Monday, July 6th, 2020 AT 12:05 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
REMOVAL PROCEDURE

CAUTION: Refer to Battery Disconnect Caution in Cautions and Notices.

Disconnect the battery negative cable.
Raise the vehicle and support with suitable safety stands.
Disconnect the battery positive cable and the wiring harness from the starter.
Remove the starter mounting bolts and washers (with the shims, it equipped).
Remove the starter.
Note the position of the snap-on shield and then remove the shield as necessary.
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Monday, July 6th, 2020 AT 12:05 PM (Merged)
Tiny
BAYLINER245
  • MEMBER
  • 1 POST
  • 1998 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 150,449 MILES
How do yo remove and replace the alternator
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Monday, July 6th, 2020 AT 12:05 PM (Merged)
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Disconnect negative battery cable
remove drive belt
remove components as needed for access
remove retaining positive battery cable to alternator BAT terminal
disconnect electrical connector
remove mounting bolts, nuts, braces and brackets.
Remove alternator
2008 mitchellondemand
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Monday, July 6th, 2020 AT 12:05 PM (Merged)
Tiny
ROD ILLINOIS
  • MEMBER
  • 1 POST
  • 1997 CHEVROLET TAHOE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 180,000 MILES
How do I change the alternator on the tahoe.
Also how to put the belt back on.
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Monday, July 6th, 2020 AT 12:05 PM (Merged)
Tiny
ZUE
  • MEMBER
  • 76 POSTS
Check Autozone. Com for instructions on replacement of Alternator and Belt. This is online anf free.
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Monday, July 6th, 2020 AT 12:05 PM (Merged)

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