2008 GMC Seirra 1500 Crusie control stopped working... I have looked under the hood... Did Not find anything indicating crusie control or abriviations... ( ( ( PLEASE ADVISE ) ) ) Thanks...Don

Take it , it does not set . ? only sets when driving over about 35.
turned on light indicates on in cluster OK.. but will not set, right.??
Dealers go nuts with this one. give them a try.
brake switch on brake peddle arm often fail and go out of ajustment.

Next is big money unit under the hood. Cheaper to bye after market system..

check brake peddle cut out .switch .
sw has 2 functions: brake lights off when at rest and on for crusie. remove connector. check out the switch.. the sw tabs often fail. tierap helps. or replace switch $ 20. item any local parts store.
ajusted on install.

P2159 - Generic Type Powertrain - Fuel and Air Metering and Auxiliary Emission Controls - ISO/SAE Controlled Description Vehicle Speed Sensor "B" Range/Performance
THIS IS FOR YOU Kia trouble code, please replace the speed sensor B, any questions, pls ask the 24 hrs live technical support multidiag access, they will like to help you, good luck

If the switch is replaced,then it can be wiring issue or faulty cruise control board.But as the switch is replaced,get the voltage at the switch tested to confirm the switch is actually receiving voltage.If no voltage received at switch power supply wire then ,apply external 12 volt power to the cruise control switch wire and then see if cruise control comes ON.If yes,then you know wiring is issue.
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On this case, to troubleshoot this problem, there are solved help links. Click the link directly and refer the details to solve this problem yourself, with help of diagrams: ------

Ford ranger cruise control not working? http://technoanswers.blogspot.in/2012/02/ford-ranger-cruise-control-not-working.html

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Horn and Cruise control quit working?

http://howtobyme.blogspot.com/2011/11/horn-and-cruise-control-quit-working.html

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Horn and cruise control not working on Plymouth Grand Voyager?

http://howtobyme.blogspot.com/2011/11/horn-and-cruise-control-not-working-on.html

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Horn and Cruise control quit working on 2003 Jaguar S-Type?

http://howtobyme.blogspot.com/2011/11/horn-and-cruise-control-quit-working-on.html

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Cruise Control stops working, Excessive cranks to start the engine and RPM goes max 2500

http://whoisbyme.blogspot.in/2012/07/cruise-control-stops-workingexcessive.html

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Cruise control stop working on 1994 Ford ranger?

http://technoanswers.blogspot.in/2012/02/cruise-control-stop-working-on-1994.html

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Cruise control not working?

http://schematicsdiagram.blogspot.com/2011/12/cruise-control-not-working.html

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1996 Ford Explorer: Cruise Control Wiring Diagram?

http://schematicsdiagram.blogspot.in/2012/06/1996-ford-explorer-cruise-control.html

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These will help.

Thanks.

You could test the point that power enters these devices when set to on for the presence of 12 -14VDC, while connecting the other lead of the tester to a point that is grounded. If your meter or tester indicates power is present, then it is indeed a ground problem. You'll need to figure out a way to restore the ground path to the device. If however, there is no indication of power, you'll need to test the wire(s) going back to the power source - fuse block, circuit breaker, fusible link, etc.

Don't forget to look for secondary fuse blocks under the hood, under a seat in the cabin, etc. Consult your owner's manual for the location of these power points and circuit safety devices.

Good luck!

Check the fuses and relays.

sounds like you have a vacuum leak somewhere or a faulty check valve. the air control and speed control are both vacuum operated. check for cracked vacuum hoses under the hood. The Jeeps also ran a check valve either near the intake manifold or near the a/c and heater core lines where they enter through the firewall or some had both. to check the valve, remove from the lines and try to blow through both sides. should only allow air to flow through from one side. if you remove pay attention to how it was installed so you can reinstall in the correct direction

Your model may be under the recalls. There was a mass recall for Ford controls and the dealers added a inline fuse under the hood by the cruise control box.

the CLOCKSPRING needs replaced in the steering colum.

check brake fluid level.if to low cruise will not work. also check all fuses.

1ST THING TO CHECK IS THE STOP LAMP FUSE . FUSES LOCATED LH SIDE UNDER HOOD. THIS FUSE ALSO POWERS THE ACC. CIRCUT IN TRUCK. ALOT OF TIMES, LAP TOPS, DVD PLAYERS ETC. OVERLOAD CIRCUT & FUSE BLOWS.