99 C1500 Suburban Lights flickering inside and out - The 1947 - Present Chevrolet & GMC Truck Message Board Network

shultzee13 · 06-23-2014, 10:32 PM

My C1500 5.7L Vortec lighting flickers very faintly on inside and outside lights. I check alternator and it registers 13.5 to 13.6 constantly. Nothing below that or above. Was there a TSB about this? Maybe I missed something. Any other ideas?
Thanks.

**Boog** · 06-24-2014, 09:21 PM

I would clean the battery cables, especially the ground.

83GMCK2500 · 07-02-2014, 11:55 PM

Look for any swelling or distortion in the casing/insulation on the battery cables near the ends. Corrosion can start at the end and work it's way down the casing out of sight. Also check the body to frame and engine to body grounds. IIRC, back of passenger side head and roughly straight below that on frame.

Mr-Jack · 07-08-2014, 11:50 AM

you look at the voltage regulator at all? also like 83GMCK2500 stated...check all major ground points

06-23-2014, 10:32 PM	#1
shultzee13 Registered User Join Date: Jan 2012 Location: Tyler Texas Posts: 223	99 C1500 Suburban Lights flickering inside and out My C1500 5.7L Vortec lighting flickers very faintly on inside and outside lights. I check alternator and it registers 13.5 to 13.6 constantly. Nothing below that or above. Was there a TSB about this? Maybe I missed something. Any other ideas? Thanks.

06-24-2014, 09:21 PM	#2
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 12,957	Re: 99 C1500 Suburban Lights flickering inside and out I would clean the battery cables, especially the ground. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

07-02-2014, 11:55 PM	#3
83GMCK2500 Registered User Join Date: Sep 2009 Location: Beaverton, OR from WA State Posts: 1,515	Re: 99 C1500 Suburban Lights flickering inside and out Look for any swelling or distortion in the casing/insulation on the battery cables near the ends. Corrosion can start at the end and work it's way down the casing out of sight. Also check the body to frame and engine to body grounds. IIRC, back of passenger side head and roughly straight below that on frame. __________________ Devin 1983 GMC High Sierra 2500, 4x4, RC/LB, 400 S.B., SM-465, NP-208, Corporate 10 bolt & 9.5" 14 bolt 1996 GMC Sierra SLE 3500 DRW, 4x4, EC/LB, Vortec 454, NV-4500, BW-4401, AAM 925 & AAM 1050 1997 GMC Sierra SLT 1500 4x4, Z71/F44, EC/SB, Vortec 350 My Introduction with my '83s History New Daily, the '96

07-08-2014, 11:50 AM	#4
Mr-Jack Beer Drink'n Knuckle Dragger Join Date: Mar 2010 Location: Eatonville, WA Posts: 493	Re: 99 C1500 Suburban Lights flickering inside and out you look at the voltage regulator at all? also like 83GMCK2500 stated...check all major ground points __________________ GOD BLESS MY BROTHERS & SISTERS THAT SERVE WITH US *- 67 GMC Long-Wide* *350/SM420* *My BACON Wrapped Meatloaf Recipe*



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