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12-21-2008, 02:13 AM
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#1 |
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Registered User
Join Date: Dec 2006
Location: Crossett AR
Posts: 9
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Why do all my lights flicker 03 gmc truck
Hi I have a 03 GMC 1500 4x4 truck and my truck has been doing this for awhile. I notice it more at night, When I first start the truck and drive down the road the lights will flicker real bad and after a while of driving they will still do it just not near as bad. I took my fluke meter and tested the voltage with the motor running it read 14.3-14.4 and whenever it flickered it dropped down to
11.8-12.2v I notice it more, When I give it gas and let off it drops way down then jumps back up again... Is the voltage regulator in my alternator going out?? Thanks for any help Rob |
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12-21-2008, 09:35 AM
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#2 |
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Senior Member
 
Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,237
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Re: Why do all my lights flicker 03 gmc truck
bad alternator
__________________
David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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12-21-2008, 10:58 AM
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#3 |
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Registered User
Join Date: Dec 2006
Location: Crossett AR
Posts: 9
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Re: Why do all my lights flicker 03 gmc truck
Ok thanks I figured that is what it was
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