Question about 1997 GMC Sierra

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My spedometer and tach and gear indicator ligght are not working,and my tranny is in failsafe mode

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Ceheck all fuses in cab and engine compartment and make sure all harnesses on tranni are not corroided and plugged in tight.

Posted on Apr 25, 2010

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Posted on Jan 02, 2017

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1 Answer

Where is BRAKE TRANSMISSION SHIFT INTERLOCK SOLENOID in a 2003 Saab 9-3?


It sounds like you are either in "winter" mode, or "failsafe mode". If it's winter mode, you should see the word "winter" somewhere on the display. On my 1998 Saab 900, the winter button is on the console. Pushing it turns the winter mode on and off. If it's in failsafe mode, you're going to need to take it to a GM dealer.

May 11, 2014 | 2003 Saab 9-3

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Mercedes E280 not changing from gear one after repalcing engine


The car is or should be stuck in a failsafe mode. You need to take this to either a indie or the dealer and have them erase the tranny error codes. These require a shop grade code reader as even a good consumer grade will not be able to read or reset the tranny codes amongst others.

Mar 22, 2013 | Cars & Trucks

1 Answer

I have a p1870 error code what do i need to replace to fix it


Your Trans is definately slipping even though it doesn't seem like it. If this just started, DO NOT, I REPEAT DO NOT!!!! drive the car in this state, even with the SES light off it's still happening. You WILL have to get a rebiuld if you continue to drive it like this. Here's the deal of EXACTLY whats happening.... and no, an auxillary cooler won't remedy this problem.

(BEFORE SES LIGHT)

#1 - Valvebody gets stuck closed, insufficient tranny fluid to cool transmission.
#2 - Trannsmission gets HOT due to insufficient fluid, and begins to slip (explains lack of accelleration power)
#3 - Computer detects slip after about an half hour of highway speeds and engages the FAILSAFE which applies MAXIMUM LINE PREASURE to push the fluid to the transmission although this does not work due to stuck valve.... MAX LINE PREASURE is actually what causes your harsh 1st-2nd gear shift... before this it SEEMS to run perfectly fine although it's not...
#4 - The First it detects it in a running cycle, the computer just activates the FAILSAFE with harsh shifting WITHOUT the SES light... however the SECOND time it detects it in the next running cycle...then...

(SES)

#5...You get an SES light with the code P1870 (Transmission Component Slipping or 4X4 Transfer box)... PLUS FAILSAFE mode which activates harsh 1st-2nd gear shifting...
#6 ...You turn car off, turn car back on and everythings running fine??? Nope, problems still there, you just resetted your computer which deactivates FAILSAFE mode until it detects another slip....

You will COOK your transmission if you continue to drive it like this... Trust me I have a 97 V6 with an A4 (Same tranny) and had to get it rebiult because it got so hot in there it fried all the shift solenoids, Ironically I just got it out today. The Sonnax Kit listed above is the common remedy to this issue... After the kit's installed the problem will never happen again...

Mar 16, 2011 | 1995 Chevrolet Camaro

1 Answer

"Check Gages" light on, no speedo or tach operation.


pull the shifter down to first when you stop then put shifter back into drive when you start to move...

Dec 24, 2009 | 1998 Chevrolet C1500

1 Answer

Tach isnt working and spedometer whyÉ


check the speed sensor located on the transmission

Nov 18, 2009 | 1995 Nissan Pathfinder

1 Answer

I'm having problems with my trans in my 95 suburban. Sometimes when I start it my tach and the shift indicator lights don't light up. When this happens the trans feels as thou Im starting in second or...


there is a sensor on the tranny called nsbu neutral saftery back up switch. this tells the computer what gear the tranny is in when to shift, and controls the indicator lights get it fixed before you damage the tranny

Sep 23, 2009 | 1999 Chevrolet Silverado 1500

2 Answers

Spedometer on 2003 Aztek stops working on trips


hi jenny, this sounds like the cable is not positiond right. were your speedo is you need to check cable at the back of it to make sure it is in right, if it is then you need to follow the cable to the gear box and make sure its in tight. if you have done all of these things then your cable in no good need to replace it.

May 27, 2009 | 2001 Pontiac Aztek

1 Answer

1997 chevy 4/4 k 1500 158,000 ml truck stuck in 2nd only when hot


1st check tranny fluid level if good tranny needs to be rebuilt it will go into failsafe mode when the computer sences to much slippage

Mar 03, 2009 | 1997 Chevrolet K1500

1 Answer

1996 honda ciciv automatic transmission


that could be a result of your clutch being worn.....or worn gears. have it checked by a professional

Jul 28, 2008 | 1996 Honda Civic

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