'07 Tahoe; check engine light on steady. Just came

This happens with a couple of my GM cars. I wouldn't worry about it much.

your idle valve may be dirty or needs replacing would check this as it controls idle. sits on the intake with wires coming out of it.

Yes it may be the wires are shorting or its actually the problem with instrument cluster.
Also get the vehicle scanned for any error codes stored in computer this will confirm whether is short circuit issue or actual problem:------
I suggest you few help links with accurate solutions to refer/go through:----Click the link below:------

Battery and brake Warning lights on Dash
http://alltypesofpartsreplacing.blogspot.com/2012/10/battery-and-brake-warning-lights-on-dash.html
--------------2002 Ford Windstar: Brake Warning Light ON dash? http://schematicsdiagram.blogspot.in/2012/06/2002-ford-windstar-brake-warning-light.html
-------------ABS & Brake warning lights remains steady on dash? http://schematicsdiagram.blogspot.com/2011/12/abs-brake-warning-lights-remains-steady.html
-----------Chevrolet Tahoe Hood open warning on dash and alarm sounds? http://schematicsdiagram.blogspot.com/2011/12/chevrolet-tahoe-hood-open-warning-on.html
-----------2005 Chevy Impala: Service Vehicle Soon Warning Light? http://whoisbyme.blogspot.in/2012/06/2005-chevy-impala-service-vehicle-soon.html -------------- Malfunction Indicator Light ON http://whoisbyme.blogspot.in/2012/06/malfunction-indicator-light-on.html
-----------Car Runs Fine But Check Engine light is ON?

http://whatisbyme.blogspot.in/2012/05/car-runs-fine-but-check-engine-light-is.html

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Check engine light with codes P2195 and P2197?

http://howtobyme.blogspot.in/2012/01/check-engine-light-with-codes-p2195-and.html

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How to Read Codes from Check Engine Light? http://schematicsdiagram.blogspot.com/2011/12/how-to-read-codes-from-check-engine.html
-------------These will help.Thanks.

Hello I have a 1995 Sonoma 4.3 with 150.000 on her and she ran great tell last week went to pick up a lite trailer and dove it home no problem drove it all day after that. The parked it running fine and next morning it won't hold a idle but clears up at 3000 RPM runs fine drop in gear and it won't stay running??? Cleaned TBI and there was a new fuel pump and filter put on it less them 7.000 miles ago. Found vacuum leak on the booster to manifold fix that still runs like it is misfiring??? Any help would be great thanks no check engine light on.

Idle speed control valve located on your throttle body. It has the engine searching for idle, internal plunger is not backing down. This will cause the check engine light to light . if you wont, i think they still offer free check engine light checks at auto zone, i now they still do around here

How often varies on a number of factors. Such as the wear rating on the pads that you have installed, the driving conditions etc.

I'd say the Average for city Driving can be as low as every 15-25,000 miles to as high as 50,000 miles with minimal use situations like mainly highway driving.

Ever 3,000 miles 1 Engine oil and filter 2 Lube suspension and u joint
Every 10,000 miles 1 Rotate wheels 2 Inspect for worn steering parts 3 Replace fuel filter 4 Replace air filter
Every 40,000 miles 1 Transmission oil, filter and boost valve 2 Transfer case 3 Front and Rear axle oil changed
Every 100,000 miles 1 Service ignition system. Spark plugs/ wires ECT 2 Service cooling system, Thermostat and coolant flush
Thank you for using fixya and replace any worn parts though out inspection during servicing

YES!!, you had it tuned, it runs good, but gas mileage dropped, and check engine light is on,it sounds like the o2 sensors are slow or even dead, i would replace them for sure and that just might solve all your problems,good luck, hope this helps.

If the only problem is idle and it runs grat above ide then the most likely component is the Idle Air Control valve. This is providing you have no codes stored indicating something else.

Just trowing some suggestions out there, but, I would check the idle air control valve (solenoid) or the throttle position sensor. If they check out then my last guess would be the map sensor or the vaccuum to the map sensor. Hope I was able to help. Best wishes.