2006 2500 chevy pickup, reduced engine power,seems to be ok till I turn A/C unit on

Help, Engine Power Is Reduced on Chevy Duramax - Page 4 - Forest ...

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May 27, 2014 - 10 posts - ‎5 authors
OK, many things can cause a reduced engine power message, ... as a regen message and no, idling long enough to fix a wheel WILL NOT plug it up. ... I have a monitor onmy truck that I can watch the accumulated soot grams ...

2003 Chevy Trailblazer-CHECK ENGINE LIGHT AND REDUCED ENGINE POWER ...

www.topix.com > California > San Diego County > Oceanside
Dec 23, 2011 - 2003 Chevy Trailblazer-CHECK ENGINE LIGHT AND REDUCEDENGINE POWER ... The reduced engine power ligth comes on and I lose power. ...Next, the fan clutch failed -- which is when he did an "above and beyond" .... yesterday I have not replaced anything bc they have told me nothing is wrong.

Please pull up the error codes so that the actual problem could be found.

engine power reduced means that the CPU has placed the ECM in a safe operating mode and reduced power to lessen the risk of serious engine / transmission damage. Stop and check oil level and coolant level at the radiator cap. have the fault codes read urgently so as to prevent damage to the units

Not a catalytic converter problem ! All the light's being on is a warning to the driver to take their vehicle to the dealer , not to be inquisitive an try to fix on their own . Complex electronic's , computer , software etc....
ENGINE POWER REDUCED has to do with electronically controlled throttle . Your best bet ,take your vehicle to a qualified repair shop an have diagnostic's run . DTC'S - diagnostic trouble codes stored .
Electronic Throttle Control System Diagnosis Diagnostic Quick Tips Snap on...
Drive by Wire Function and Diagnostics by Wells

Ok I would start by checking your shifter to make sure it adjusted right and you can do this by looking at your shift indicator if that is ok then might have a bad manual shift valve thats in the transmission, if that valve goes bad it would tell the pcm that your transmission is being shifted into another gear while your driving causing the Power control module (PCM) to out you vehicle into reduced engine mode

Plug wires? Notorious for going bad. Bad fuel? Combination?

the post that everybody refuse to read or acknowledge is the first simple instruction
when ever there is a problem , have the fault codes read first
it is free at autozone and other parts shops
then knowing what the problem is you can have it fixed at an accredited service center for less money that fixing what is not faulty costs

i have a 98 chevy s10 zr2 and we changed the fuel pump and aint gettin no power to the fuel pump checked the fuses and relay under the hood no power and the gauges inside are not working other than lightin up.are there another fuse link some where

Maybe got an air lock/bubble