Code List Reduced power light

It means there's a trouble code stored in the computer. Get the code read and then post it here.

http://ricksfreeautorepairadvice.com/reduced-engine-power/

Just to add to this one if the reduced power light is coming on then your having a failure in your electronic throttle system. Get the computer scanned for codes and post the exact code numbers not the code descriptions.

this code does not exist in my universal code list so consult the code manufacturere

Just my 2 bits, go through a spring cleaning checklist. Plugs could be fouled up, fuel could be contaminated, you already did the filters. Do you have it chipped or programed? Change the exhaust lately? Do you have the code number? Autozone will scan it for you for free, tell you the code number. Again, just my 2 bits.

If the warning liught come on, I suggest scanned the computer car in order to know what fautl code is stored there; note this code num ber and send us for other details.

Your Tahoe goes into "Power Reduction Mode" to keep you from continuing to operate the vehicle with an OBVIOUS problem and destroying high-dollar parts like catalytic converters, cylinder heads, etc.. Yeah, the old days of simply ignoring Check Engine lights are over.... The manufacturers have made it so the engine will go into reduced power mode and FORCE you into properly maintaining your vehicle.

(Not saying that you don't maintain your vehicle...Just pointing out that you can thank all of those people that continuously run around with warning lights SCREAMING all over their dash for the wonderful little "Reduced Power Mode" feature.)

As for what could be actually causing thie problem? Well, just let me say that the last time I counted, there were over 600 "generic" OBD fault codes available for most cars (80% of which will turn the Check Engine light on long before reduced power mode takes place), and several hundred more "vehicle specific" fault codes that have not yet made the generic code list.

So, to put it simply, you will have to scan your computer network and gather all the fault codes and perform fault code diagnostics to determine the actual cause of your problem.

Take your TB to Autozone or a parts store that offers a free check engine light check. All they do is tell you what code your check engine light is throwing. Get this code, and we can help from there.

hook it up to OBD 2 scan retrieve fault code and go from that point!