2002 GMC Yukon XL Denali Q&A

2002 GMC Yukon XL Denali Question: i replaced my alternoter now my truck will not pick up speed i have tried all

i have tried all arears even took my neg. turnmnal off to reset it -
Answer 1
scan for codes or ck for plugged exh system. did you have this prob b4 you worked on it? -