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Chevy Silverado and GMC Sierra Electrical and Computer Questions

768 messages,  Last post on May 07, 2013 at 9:49 PM

You are in the Chevrolet Silverado & GMC Sierra Forum.

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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Messages Page 16 of 78

#147 of 768 1997 Silverado Headlight Problems by jeh4

Jan 02, 2008 (2:58 pm)

I am having a problem with the low beam headlights on my 1997 Chevy Silverado. The running lights come on when you turn the key or the vehicle is running. If you turn the headlights on the running lights go out and the low beams will not activate, however; the high beams work. If you place the light switch selector on the parklight selection the park lights will activate and the running lights will remain on (basically you have low beam headlights and marker lights). I changed the headlight switch but the problem persists. Does anyone have any advice?
 
Thanks,
 
Joe

#148 of 768 Intermittent Computer Problem by azjas

Jan 03, 2008 (5:13 am)

While driving or while idling, the gauges (all of them) and indicator on my 2000 GMC Sierra SE will suddenly begin to literally go crazy! At times this will cause the transmission not to down shift when driving. I can turn off the truck/or disconnect the battery and the truck will run perfect again (Sometimes for a considerable amount of time. I checked all cables and connection - no problems found. Could this be a bad computer module? Is this an expensive fix? Where exactly is the computer module located?

#149 of 768 batteries leaking by chad8

Jan 11, 2008 (1:37 pm)

I have 01 sierra that has a very strange problem...the batteries(3 so far) I put in this thing leak(or boil) acid and don't last long...I have checked the grounds thoroughly and the cables are in good cond. I have rebuilt the alt. and also replaced it all together just to rule it out. It shows a good charge(not over) on the gauge and also with a meter. If anyone has any ideas they would be greatly appreciated

#150 of 768 No Parking Lights on 2005 Silverado 1500 by sailorshawn

Jan 11, 2008 (10:59 am)

I have a 2005 silverado. I noticed that the parking lights have stopped working. Not completely, but they won't turn on with the park light setting on the headlight switch, nor will they flash like they used to with the keyless entry. They will turn on with the headlights though. I have checked every fuse I could find on the side of the dash and under the hood. Anyone have any suggestions on what the problem may be?

#151 of 768 Re: ABS warning and Breaklight warning lights stay on. [brenlee] by davidtc

Jan 12, 2008 (1:00 pm)

Replying to: brenlee (Dec 30, 2007 9:34 am)
From what I know-experience in a GM parts department and aftermarket parts store, the ABS warning light and brake warning light at the same time may indicate a bad sensor in the ABS system. Due to the many variations within GM. Delco-Moraine, and Bendix these sensors could be located at the rotors, transmissions, or even the differential of the rear end. A computer scan may not pick this up but testing each sensor with a volt/ohm meter will indicate if it is working properly. A "good" mechanic knows how to do this.

#152 of 768 Intermittent gauge/indicator spikes-transmisson trbl by ronniew

Jan 17, 2008 (9:03 pm)

2000 Chevrolet LS P/U. A few weeks ago while driving, all of my indicators on my inst. panel lit up and all of my gauges & speedometer spiked up and down. My transmission downshifted and stuck in that gear. After I turn the engine off and then back on it runs perfect again. At night when this happens, I noticed that the gear shift position indicator goes dark. This tends to happen 2 or three times a week. Does anyone have a clue of what the likely cause is? Or where to look for the problem? Any feedback would be appreciated!
 
Most likely the same problem described by "azjas" (#148 Intermittent Computer Problem)

#153 of 768 Re: Intermittent gauge/indicator spikes-transmisson trbl [ronniew] by azjas

Jan 18, 2008 (9:46 pm)

Replying to: ronniew (Jan 17, 2008 9:03 pm)
ronnie, After waiting patiently to see if anyone on this forum would help me, I decided to look into this issue via a local GMC Dealership. I was told that the problem you (and I) are experiencing is likely being caused by a faulty ignition switch or a (ground or open) short in the wiring harness going to a sensor located in the transmission case. Although I have not had money to get my in the shop (Estimated repair cost of about $400 to replace the switch - with no guarantee that this will resolve the problem) - I plan to buy the switch and attempt to install myself - I am told that it will take some patience - but I should be able to do it.
I just don't have that type of money at the moment, but that's another problem. I am told the switch is about $175.

#154 of 768 Re: Intermittent gauge/indicator spikes-transmisson trbl [azjas] by ronniew

Jan 19, 2008 (12:12 am)

Replying to: azjas (Jan 18, 2008 9:46 pm)
Thanks azias!! I will take mine in armed with this information and post the results of what we do and if it gets fixed. It will be a few weeks before I can take it in.

#155 of 768 Re: Intermittent gauge/indicator spikes-transmisson trbl [ronniew] by barnowl3

Jan 20, 2008 (10:10 am)

Replying to: ronniew (Jan 19, 2008 12:12 am)
Guys, I have an 03 Sierra. Though I have not had that electrical problem (YET), I have a letter from GMC that they have extended the 03 warranty for 7 years, 70K miles to correct "condition where one or more of the instrument panel gauge needles may stick, flutter or become inoperative. This may cause inaccurate readings, including the speedometer and the fuel gauge". You cannot take the truck in unless you have seen the problem. The dealer is supposed to replace the instrument panel cluster. If you have already paid for this repair, I also received claim form to GMC for reimbursement.
FYI, during my warranty period they performed the following electrical repairs: alternator (under charge), alternator wiring harness (wild overcharge swings,bulletin PI.73170D), reprogrammed the radio module (no volume, bulletin 02-08-44-020B), replaced airbag sensors upfront, 6 software updates for the 4WD, AC pressure switch (shorted), 4WD drive light on-reprogrammed transfer case module (bulletin 02-04-21-006A).
And now the wipers won't turn off at times.

#156 of 768 Re: Electrical Issues: Possible Body Control Module [airforcejoe200] by barnowl3

Jan 20, 2008 (10:16 am)

Replying to: airforcejoe200 (Dec 26, 2007 6:04 pm)
I have an '03 and also a letter from GMC saying they will extend the warranty for the speedometer issue (new instrument cluster). I don't have the issue with the instruments but do have the problems with the wipers not turning off. The letter says nothing about that, so let me know what you find out. My 03 has been loaded with electrical issues.

Messages Page 16 of 78

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