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Chevy Silverado and GMC Sierra Electrical and Computer Questions

352 messages,  Last post on Nov 23, 2009 at 8:26 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


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#302 of 352
Re: Erratic voltage display [canayjun64] by robskot
May 01, 2009 (8:59 am)
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Replying to: canayjun64 (May 01, 2009 5:00 am)

I have a 07 Sierra Crew with the new body...when I first got it, it actually had a bum battery in it (had 1 dead cell) and was replaced on warranty about 6 weeks after I got the truck...it's worked 100% for just about 2 years now.
 
Since then, I have been very observant on what the battery has been doing...and SINCE I got the battery replaced, I have noticed the same as you...but have never had any other issue, so I assume that this is a normal thing.
 
Normally I notice it most on the highway...but even with iPhone and GPS and any other crap plugged in, it's been fine.
#303 of 352
Re: Erratic voltage display [canayjun64] by donl1
May 01, 2009 (12:03 pm)
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Replying to: canayjun64 (May 01, 2009 5:00 am)

I recently bought a new 1500 Silverado with the 5.3 and I also noted the voltage guage seems irregular. Hope it's nothing to worry about but it seems to be more erratic than anything I've had before.
#304 of 352
Re: Erratic voltage display [canayjun64] by barnowl3
May 01, 2009 (5:33 pm)
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Replying to: canayjun64 (May 01, 2009 5:00 am)

Your fluctuation does not seem normal to me, unless your battery is low or you have a large fluctuating load. My 2003 did this (no odd loads), but the swings actually were a lot worse and went higher than 16 volts. It happened in one day, and the swings were severe, so I had little warning and had to take it right in. They ended up replacing the alternator and my dealer found there was a bulletin on this to replace alternator wire harness" to maintain continuity" ( which makes sense for the swings you report). It was bulletin /PI. 73170D. I have an 03 GMC 2500 HD, 6.0 liter, with plow package and aux battery. It failed at 2.5 yrs, 27,000 miles. It has been good now for the past 3 years.
I've learned that the dealer's are not always aware of the bulletins, so it helps to bring the info.
#305 of 352
04 Silverado gauge cluster/radio by attindall
May 05, 2009 (7:55 pm)
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My Chevy has about 65000 miles and back in October my speedo went out. Dead. A month later the oil pressure gauge went, followed by the tach and today went the gas gauge. Sometime in November the radio started to cut out randomly. Usually when it cuts out the right green light on my rearview mirror turns red (the vertical one next to the Onstar buttons). When it cuts out the little red blinking security light comes on. If i turn the truck off and then turn the key to run it will come back on for a second and cut off again. Also randomly the lights in the power locks and windows go out, and they stop working. I only notice it at night when the lights are visible. Now that the gas gauge has gone out, if it wasnt for the Distance to Empty button on my steering wheel I'd be screwed. Anybody have ideas?
#306 of 352
Re: Erratic voltage display [barnowl3] by canayjun64
May 06, 2009 (5:04 am)
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Replying to: barnowl3 (May 01, 2009 5:33 pm)

Thanks barnowl3... Humm I guess I'll have to see if a bulletin comes out indicating a contradiction to what they said. So far nothing out there for the 2009 models.
 
Like you said, it helps to provide the info.
 
Cheers!
#307 of 352
Message Display Issue by rogerpwillis
May 10, 2009 (12:50 pm)
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#308 of 352
Message Display Issue by rogerpwillis
May 10, 2009 (12:55 pm)
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I have a 2003 Chevy 1500 with 148,300 miles (owned since new)....Has been a Great truck.....recently the message display will go from english to french to spanish...it will get stuck on hours used or trip...sometimes the trip will reset itself...it will let me set it on english and it will stay sometimes... Anybody got a clue???????????? Thanks Roger
#309 of 352
Re: 04 Silverado gauge cluster/radio [attindall] by barnowl3
May 11, 2009 (2:57 am)
Reply

Replying to: attindall (May 05, 2009 7:55 pm)

Sounds like you need to have the gauge cluster replaced. The erratic gauges and speedo issues are part of the bulletin and lawsuit. If you get there before 70,000 miles they'll cover it. Between 70 and 80,000 miles, you only get the parts for free and may need to send the info in to get the credit. The lawsuit covers you from 70,000 to 80,000 miles.
 
I have also had the radio cut out normally on my '03. The first time the dealer put in some kind of software update. It has happened 1 or 2x since then and just seems to correct itself.
 
The other problems may be related to your gauge cluster, get that fixed first and before it is not covered.
#310 of 352
1993 Chevy Cheyenne by kb52
May 11, 2009 (6:10 am)
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The a/c, heater electronic display flashes on and off and I have no control of the temperature. The display unit has been replaced once, with the same symptoms. The condensor coil was replaced and the system re-charged when the problem started. I understand the display had to be removed in order to have access underneath the dash. Any ideas on to how to repair this would be greatly appreciated by both me and my mechanic!!
Thanks, Kenneth

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