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#1
10-02-2006, 05:18 PM
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1995 C1500 Dead Speedo/Tach
OK Need some major help on this one. I have a 1995 C1500 350 automatic. The speedo, tach , and odometer have gone dead and nobody seems to know what is going on. I have changed the speed sensor in the transmission. Helped for a while then went out again. Took it to the shop and they said try changing the gauge cluster. Changed it and nothin happened. Oh and on top of it all the tranny will not shift. Only have 2nd and 3rd. 2nd only when I downshift into 2. Have a theory about the VSSB. Does anyone have any experience with this or know anything about it. Any help will be greatly appreciated.
Signed Stuck in 2nd in KC. 
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#2
10-02-2006, 05:42 PM
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Re: 1995 C1500 Dead Speedo/Tach
I have a '88 4X4 and the speedo has not worked in it for a while. I know it is the speed sensor on the transfer case just don't drive it enough to matter if it works or not. What I am getting to back when I was researching this because my speedo would go crazy and my brake lite would blink a code I think it was 13 not sure I talked to a chevy man that sounded like he knew his stuff. He said there was a sensor on the trans or tranfer case and another one under the dash I think above your left foot. The one outside is high in $$ but I think the inside one is higher.
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 '99 Blazer LT Loaded, K&N Filter, Pioneer Super Tuner,Viper '98 Pontiac Grand Prix GT, 3.8 '88 K1500 Cheyenne, 5.0, stock, bought new '86 Nissan 720 Trash Truck '69 C/10 step side, 307, all original, second owner, in process of restore. The person who says it cannot be done should not interrurt the person doing it. Share your knowledge. It is a way to achieve immortality. Allen- Paintman Wrenchtwister Broompusher
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#3
10-02-2006, 05:47 PM
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Re: 1995 C1500 Dead Speedo/Tach
Appreciate last post but the 88 is totally different than the 95 I replaced the sensor in the tranny. There is no sensor near foot and I wouldn't mind about the speedo and tach but the tranny isn't shifting and that is a very bad thing since this is a daily driven vehicle.
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#4
10-02-2006, 06:02 PM
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Re: 1995 C1500 Dead Speedo/Tach
I know all them sensors have to talk to eack other and to that one big one before every thing works just trying to pass on some info.
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'99 Blazer LT Loaded, K&N Filter, Pioneer Super Tuner,Viper '98 Pontiac Grand Prix GT, 3.8 '88 K1500 Cheyenne, 5.0, stock, bought new '86 Nissan 720 Trash Truck '69 C/10 step side, 307, all original, second owner, in process of restore. The person who says it cannot be done should not interrurt the person doing it. Share your knowledge. It is a way to achieve immortality. Allen- Paintman Wrenchtwister Broompusher
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#5
10-02-2006, 06:14 PM
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Re: 1995 C1500 Dead Speedo/Tach
The book list a auto trans downshift sensor for your truck runs about $6 they don't have a picture of it.
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'99 Blazer LT Loaded, K&N Filter, Pioneer Super Tuner,Viper '98 Pontiac Grand Prix GT, 3.8 '88 K1500 Cheyenne, 5.0, stock, bought new '86 Nissan 720 Trash Truck '69 C/10 step side, 307, all original, second owner, in process of restore. The person who says it cannot be done should not interrurt the person doing it. Share your knowledge. It is a way to achieve immortality. Allen- Paintman Wrenchtwister Broompusher
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#6
10-02-2006, 09:40 PM
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Re: 1995 C1500 Dead Speedo/Tach
Check all fuses and relays....
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94 Silverado 1500 Z71, 320 000 kms, 6.5 TD (VIN S), 3.73 rear, 4L80-E, high idle switch, snorkel removed, EGR blocked off with 45mm frost plug in tower, ISSPRO boost gauge and pyrometer (pre-turbo), #9 resistor, FSD cooler remote mounted behind bumper, 6' homemade PMD extension harness, 97 cooling upgrades, 10k pot set @ 10 psi boost, gutted upper intake, WAP glow plugs, leaf spring helpers....Saving up for: straight pipe 4" exhaust, intercooler, chip...
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#7
10-02-2006, 09:46 PM
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Re: 1995 C1500 Dead Speedo/Tach
Check the ignition switch....My brother's 96 Tahoe did very similar things... Some parts of the instrument cluster go out and the transmission only runs in 3rd gear. There are multiple contacts in the ignition switch and one of those goes bad which does not supply power to some parts of the cluster AND the transmission solenoids. If you can find the fuse that supplies the transmission power, see if you are getting +12v. If not, check your ignition switch. Is the problem intermittent....sometimes you start it and it is ok? His was.
-Ed
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#9
10-06-2006, 03:49 AM
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Re: 1995 C1500 Dead Speedo/Tach
Try changing the speed sensor buffer its a small white box inside the dash u will need to take out the glove compartment and u can find it it converts the signal that the speed sensor sends into a signal the cluster can use. my 1993 did the same thing
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#10
10-06-2006, 03:23 PM
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Re: 1995 C1500 Dead Speedo/Tach
Quote:
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'99 Blazer LT Loaded, K&N Filter, Pioneer Super Tuner,Viper '98 Pontiac Grand Prix GT, 3.8 '88 K1500 Cheyenne, 5.0, stock, bought new '86 Nissan 720 Trash Truck '69 C/10 step side, 307, all original, second owner, in process of restore. The person who says it cannot be done should not interrurt the person doing it. Share your knowledge. It is a way to achieve immortality. Allen- Paintman Wrenchtwister Broompusher
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