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Chevy Silverado and GMC Sierra Electrical and Computer Issues

236 messages,  Last post on Sep 02, 2008 at 11:28 PM

You are in the Chevrolet Silverado & GMC Sierra Forum. Your Host is kcram

What is this discussion about? Chevrolet Silverado 1500, Chevrolet Silverado 2500, Chevrolet Silverado 3500, GMC Sierra 1500, GMC Sierra 2500, GMC Sierra 3500, Truck


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#223 of 236
Re: 2004 GMC Sierra 2500 Alarm Problems [sdlerner] by mgandrew
Jun 16, 2008 (6:56 am)
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Replying to: sdlerner (May 30, 2008 6:55 pm)

You Need an Exorcist.
#224 of 236
Battery Overcharging by hauler007
Jun 17, 2008 (7:03 am)
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HI I have an 06 GMC Sierra1500 5.3 and am having problems with it overcharging i replaced the altenator and it still does it also the message appears in the info center to check oil level and now it is also starting to say check windshield washer level have talked to dealer about this but still waiting for reply any help would be very welcome
thanks
#225 of 236
Re: Battery Overcharging [hauler007] by barnowl3
Jun 19, 2008 (8:14 pm)
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Replying to: hauler007 (Jun 17, 2008 7:03 am)

I have an 03 Sierra, 2500 HD, 6.0 l and had a similar problem. All of a sudden one day, it would go from an erratic overcharge to undercharge. I went straight to the dealer due to the high voltage spikes. They replaced the wiring harness to the alternator under warranty. Bulletin # /PI. 73170D. 2 months later it started undercharging and they then replaced the alternator. I assume the faulty harness caused the alternator failure. The voltage swings were wild. so I was surprised it didn't do more damage.
#226 of 236
Re: 2000 seirra 4wd "serivce 4wd" [rattaway11] by stretch87
Jun 24, 2008 (9:56 am)
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Replying to: rattaway11 (Jun 01, 2008 9:49 am)

Have not seen any responses to your ques. did you receive any??
#227 of 236
Computer Upgrade by snowgodd
Jul 07, 2008 (6:07 pm)
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Does anyone know of a way to upgrade or convert the computer in a 01 Silverado so that half of the injectors are not used while on the highway.
#228 of 236
94 gmc electrical problems by jfred09
Jul 12, 2008 (12:21 am)
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ok...just got this truck the other day....its a 2 owner truck and the first guy put a system in it and i think he screwed it up big time....symptoms....1. with my lights off my left turn signal works but when i turn the lights on at nite..it doesnt work at all..2.sometimes...when i turn the left signal on it makes both of the turn signal lights go off...3..also sometimes when i hit the breaks...my turn signal lights in the front blink...(thought that was the strangest)..4..it has a coverette style rollpan on it and only 2 outta 4 lights work...my friends noticed the other day that when i turn the left signal on..the cd player(aftermarket) blinks with it....any ideas...im know a lil bit about vehicles but idk where to even start on this one!!!
#229 of 236
Re: 94 gmc electrical problems [jfred09] by obyone
Jul 12, 2008 (6:04 pm)
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Replying to: jfred09 (Jul 12, 2008 12:21 am)

That is a nightmare. Reminds me of a friend who rewired the factory harness when installing an aftermarket stereo rather than buy a $10 adapter at Best Buy. Blew a few fuses then the headunit itself.
 
Personally, I'd check the power connections first. That is where the guy is getting the power for the lights, etc and go from there. Could be he has a few of them crossed or all connected to the same place. Watch for splices as the factory doesn't do that only diy installers.
#230 of 236
Re: 2004 GMC Sierra 2500 Alarm Problems [sdlerner] by ripthelip
Jul 13, 2008 (11:18 am)
Reply

Replying to: sdlerner (May 30, 2008 6:55 pm)

Hi-
 
Did you get any aftermarket add-ons or did you get another alarm to supplement the factory? If you did, most of them don't work well with GM vehicles. I went and had a Viper put in instead of the Factory. Much better protection.
#231 of 236
silverado electrical by robert69z
Jul 16, 2008 (5:42 pm)
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i need help :driving home from work ac, power windows, 4wheel drive, door locks, radio ,and head lights went out . 2 hours later everything was working again i am at a loss checked all grounds and everything i can think of . drove to work next day was fine till i was coming home same thing again . today no trouble . anyone have any ideas where to look on here i have a 2004 silverado 4x4 ext cab 5.3 l engine .
#232 of 236
replacement suggestions by rdudley19
Jul 30, 2008 (2:07 pm)
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I have an 02 1500 HD. the running light on the left side is out. I can replace one for $27 with the amber turn signal lens or the pair with clear turn signal lens cover for $67. Any opinions on this?

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