clayburn

Just started this last week . The reduced power light comes on and truck slows down to about 15 mph. I pull over turn it off then restart it and it gets me a little ways but light comes back on. Any ideas???? 2003 silverado

Cowboycoupe

No check engine light? I'd either get an inexpensive code reader/scanner, or go to some place that will pull codes for free.

loxahatchee

the reduce power message comes on if you have no oil or low oil pressure,low or no anti freeze, or catalytic converter problem.

chevy55

almost sounds like a plugged cat,when they get hot it causes reduced power big time.it could still be other issues as mentioned.

cleveland63b

reduced power will be displayed for a big range of things, there WILL be a code possibly more than one and until you know which codes its just a guessing game.

mvf209

The same thing happened to me a year ago. I had to replace the throttle body.

roofcleaner

throttle body needs replacement covered under 100,000

cleveland63b

03 would not be covered under warranty for any mileage

roofcleaner

i meant to say if you were under warranty it would have been, sorry