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Chevy Silverado and GMC Sierra Electrical and Computer Questions

354 messages,  Last post on Nov 20, 2009 at 11:13 AM

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

#332 of 354 Security System fault by himie Sep 11, 2009 (5:06 pm)
I have a 2003 GMC SIERRA PU. Security Alarm will go off anytime. I have tried to disconnect the battery and for a period of time, but still sounds off anytime. Has anybody had this problem and how did you fix it?
#333 of 354 Re: ABS warning and Breaklight warning lights stay on. [brenlee] by shaneo Sep 14, 2009 (3:44 pm)
Replying to: brenlee (Dec 30, 2007 8:34 am) I have a 2001 chevrolet silverado 1500 and my lights just like yours comes on and stays on I personally have a relative that works at the dealer ship and he too put my truck on a dianostic machine and it gave two codes.The machanic said it was a computer module that went bad so I read your story and I wanted to share it with you....maybe it could be the same problem. Write back to me at shane_denaisyahoo.com. Shane
#334 of 354 Re: possible security preblems [arkpaul] by 98redrider Sep 21, 2009 (4:23 am)
Replying to: arkpaul (Dec 04, 2007 6:27 pm) I have had the same problem for years and recently it is much worse. Did you ever get any help on this subject? I tried a bypass module, but when I called the manufacture for DIY help they told me their product is not a solution to get around the engine immobilization, i.e. fuel pump shuts down. They said mom & pop alarm shops usualy have a "creative" way around this problem, but I can't find anyone locally that knows how to jump around the system to this problem so it goes away for good.   Thanks! Help from anyone else would be greatly appreciated too. Replies to this message: himie (Sep 21, 2009 2:11 pm)
#335 of 354 Re: 1997 Silverado Headlight Problems [jeh4] by embiar Sep 21, 2009 (5:18 am)
Replying to: jeh4 (Jan 02, 2008 1:58 pm) I have the same problem, it is in your tilt steering column not the fuses or headlights, I have not broken it down yet to find the answer that is why I looked to here to see if anyone had similar problems, if you raise your tilt all the way up they should come on intermittently, I am not sure if it is a wire degraded from the strain of being bent back & forth or it has some type of contacts since the travel is extensive, but I have had to jar the steering column sometimes to get it to temporarily work, I hope this at least points you in the right direction, I will let you know if I find the permanent fix, is seems it is a common problem with that design & is used in numerous GM vehicles
#336 of 354 2500 HD misfiring by levin1 Sep 21, 2009 (7:51 am)
My 2001 Chevy 2500 HD 6.0 liter is misfiring on #'s 2,4,6,8 cylinders and if I understood it correctly it is all on the passenger side. It just happened over night. It came up on the computer as being one of three things. Intake gasket, bad plugs or wires. Had the gasket replaced and drove it home about 7 miles and it ran fine. Sat for two days started it up and it was misfiring again with the service engine light flashing as before. I do have a bad catalytic converter that has been rattling for about 4 months, I don't know if that has any bearing on the problem or not. Thanks for any help. Replies to this message: greywrench (Sep 22, 2009 7:25 pm) levin1 (Sep 29, 2009 9:02 am)
#337 of 354 Re: possible security preblems [98redrider] by himie Sep 21, 2009 (2:11 pm)
Replying to: 98redrider (Sep 21, 2009 4:23 am) While driving the truck last weekend my dash was reading "Right Door Ajar". My lights were also staying on. A couple times I couldn't get my inside lights to turn off after the alarm sounded until I disconnected my battery. So I took it into the dealership and told them what was going on. They said my switch in the right door was tested and said it was bad, It cost me $427 for parts and labor. It has been 5 days and the alarm has not sounded, and it was happening alot if I had the battery connected. Keeping my fingers crossed.
#338 of 354 2007 Siverado 1500HD battery dies when truck is not used for more than 3-4 by carnut69 Sep 22, 2009 (9:39 am)
2007 Siverado 1500HD battery dies when truck is not used for more than 3-4 days, I have had the dealer do many tests and no real answers, the battery has been changed out twice, the truck is optioned up pretty good, so there are a lot of draw functions on it, but the parasitic draws are not out of line according to the dealer, I would like to use a bigger better battery, but the space won't allow this....any one had this problem???, the truck is well maintained, and had about 21K on it Replies to this message: kodak1 (Oct 12, 2009 5:30 pm)
#339 of 354 Re: 2500 HD misfiring [levin1] by greywrench Sep 22, 2009 (7:25 pm)
Replying to: levin1 (Sep 21, 2009 7:51 am) if the rattling cat is on the passenger side it may be your problem. if the cat is not burning off unburned fuel the post cat oxygen sensor will read a rich condition and the computer will deliver considerably less fuel to that bank of cylinders causing misfires. Replies to this message: levin1 (Sep 29, 2009 9:02 am)
#340 of 354 Re: 2500 HD misfiring [greywrench] by levin1 Sep 29, 2009 (9:02 am)
Replying to: greywrench (Sep 22, 2009 7:25 pm) Thanks for your response. I haven't had any trouble with the misfiring for a week. The rattling at the cat area has stopped, actually right before the misfiring started. I did get a diagnostic check run on the truck after the intake gasket was replaced and it misfired again and nothing came up, cats are good at the current 77,000 miles. I thot for sure the cats were bad, something was rattling under there and I never could find out what it was, everything was tight. Its purring like a kitten now, I'll keep on trucking. Thanks again.
#341 of 354 Re: 2007 Siverado 1500HD battery dies when truck is not used for more than 3-4 [carnut69] by kodak1 Oct 12, 2009 (5:30 pm)
Replying to: carnut69 (Sep 22, 2009 9:39 am) just joined this forum hope this helps you it was my problem my battery would always run down on my 06 4x4 it ended up being my windshield wiper motor shorting against the body try unplugging it for a few days. later

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