2003 gmc envoy 4.2 has no power

Ask our auto mechanics for help to all your GMC truck questions.
victor
Posts: 1
Joined: Sun Jan 27, 2013 3:13 pm

2003 gmc envoy 4.2 has no power

Unread post by victor » Sun Jan 27, 2013 3:20 pm

i have 2003 gmc envoy 4.2 no power, it slows down to 20mph.

User avatar
ProTech
Posts: 651
Joined: Wed Oct 17, 2012 10:08 am

Re: 2003 gmc envoy 4.2

Unread post by ProTech » Sun Jan 27, 2013 9:20 pm

Could be a bad catalytic converter. When it goes out, or gets heavily clogged up, it can reduce power very much and it seems like it won't accelerate or get any speed up.

Other things that can cause this would be....a bad fuel pump, clogged fuel filter, clogged air filter, dirty fuel injectors, timing issues, etc.

I would recommend checking for any codes that have set in the computer and go from there.
GM Dealer Technician For 18+ Years
In the automotive industry for 20+

  • Similar Topics
    Replies
    Views
    Last post