Originally Posted by gstump
We have a 2003 Envoy XL SLT 6 Cycl 4x4. 130K miles. Just in the last few days or so I have noticed that it doesn't have all the power that it used to have. Manily I notice it when going uphill as it's now having to kick down a gear to climbs hills it could do in a higher gear before. Also not as fast off the line. I did a search here but only see where people are getting a warning light that says "Loss Of Power". I'm not getting a warning light...just the actual power loss.
I cleaned the throttle body a few months ago and changed plugs while I was in there. Had the fan clutch go out a few years ago so I don't think that's the issue and it's been cold here but certainly not east coast cold :-) Air cleaner was recently replaced. Both differentials and tranny have recently had fluids changed. Figure I will need to purchase something that will read codes but in the meantime I was just wondering if you guys could suggest things to check?
UPDATE: After researching this some more I'm thinking it might be a clogged cat so I am going to test that by removing the O2 sensor and seeing if it runs better. Will post follow up.
Many thanks in advance!
West Linn, OR
I was just going to say.... "It sounds like a clogged cat" just went through this at 150k.
Dont forget KEEP the old cat as it is worth around $50 for this vehicle. If you dont know any local places that will buy it there is ONLINE ones that will pay the shipping and you for it.