This morning on the way to work I had my cruise set at 50 and all of a sudden my gauge cluster dings and says reduce engine power, so I pull over in the median and try to take off again there was absolutely no power in the truck but it never cut off. So I was able to creep to a gas station and turn the truck off for about 10 mins later I cranked it up and drove on to work. Does anyone know why this happened I know that I have a bad rear o2 sensor could that be it or is the computer going out I have a westers tune. Thanks

 

PMing you a source.

 

I had that happen to me the only difference is mine caught on fire , 06 sierra 5.3

 

tried to post pics but will not let me say they are to big and don't know how to make them smaller

 

well it happened again today along the same stretch of road and the cruise was set so I cut the truck off and let it set cranked it back up and no prob

 

I ran into this same thing with a 03' sierra. ended up replacing the throttle body. try cleaning it first, could be some carbon buildup causing the blade to stick.

 

thanks but ,my truck is throwing a code po430 Catalyst System Efficiency Below Threshold (Bank 2)

 

sounds like a bad cat on passenger side

 

I'm thinking about replacing the stock cats with after market cats from magnaflow are they worth the money or not need suggestions

 

i have them on my silverado and made a sound and difference. thay are only about 75 bucks. i would get them if i was you.