Posted to GM Engine on 4/11/2012 4 Replies

I have this truck at our shop that is verry interminit and am looking for a starting point. Coustomer is saying truck will stall or almost stall at a stop and when it does check engine light and reduced power light will come on. My codes are p0443,p3401, p3425...

FIX posted 4/20/2012