Battery light on?

DSTAM932

MEMBER
2 POSTS
2004 CHEVROLET SILVERADO
6.6L
V8
TURBO
4WD
AUTOMATIC
268,000 MILES

Install new alternator working great and charging, but the battery light will not go off, tried to locate alternator
fuse no luck. Found battery fuse under the hood in the fuse box, fuse is good, Don't where else to look.

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Thursday, September 3rd, 2020 AT 6:23 PM (Merged)

JDL

MECHANIC
16,098 POSTS

Did you check for applicable trouble codes? Some of the national brand autostores will check codes for free. Check manufacturer specific codes as well as po codes.

Our database says to use a scanner that will show live engine data for your vehicle, check ipc, instrument panel cluster pids, if the charging system reading is correct and the lamp is on, replace the ipc. I won't replace anything unless diagnostics point me in that direction.

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Thursday, September 3rd, 2020 AT 6:23 PM (Merged)

DSTAM932

MEMBER
2 POSTS

I have a Edge programmer the code was PO621 Generator L
Terminal Circuit, Generator not charging, placed Volt meter on battery
with engine running, shows 14 amps also the volt gauge in truck also shows 14 amps. Could I disconnect both battery cables wait 10 minutes
and let the computer reset?

Dale

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Thursday, September 3rd, 2020 AT 6:23 PM (Merged)

JOHNBISHOP70

MEMBER
1 POST
2005 CHEVROLET SILVERADO
6.6L
6 CYL
4WD
AUTOMATIC
230,000 MILES

When I turn my truck off, the red battery light in the upper right hand part of the cluster comes on and stays on. Is this normal? My truck listed above is a 2500HD with Duramax 4x4.

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Thursday, September 3rd, 2020 AT 6:23 PM (Merged)

ASEMASTER6371

MECHANIC
52,797 POSTS

Good morning,

Is the light on without the key in the truck?

If the light is on, then the alternator is the issue.

If it is not, then with the engine not running, the light being on is normal.

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

Roy