Experiencing loss of power, especially going up hills

10

Asked by Mar 24, 2014 at 02:23 PM about the 2001 GMC Sierra 1500

Question type: Maintenance & Repair

I was driving my 2001 GMC Sierra 1500 the other day and it started having some performance issues. I noticed that the engine would lose a lot of power and almost die but then it would sort of cough and pick up speed again. I haven't had this truck for long but it does have 210,000km on it.

4 Answers

9,915

Losing power under load. Your catalytic converter may be plugged. That would explain the power coming back after the rmp's drop and the back pressure releases. Just taking a swing at this one..

1 out of 1 people think this is helpful.
10

You may be right. I just did a web search on that and part of what I learned is that the converter will rattle if broken/clogged. I have been hearing this off and on since I bought the truck but I was thinking it was something else.

1 out of 1 people think this is helpful.
9,915

I posted this in another thread, something you could try to troubleshoot: I would suspect a clogged catalytic converter. It's hard to diagnose a problem without data, but from what you're describing it's certainly a possibility. Catalytic converters clog over time from carbon build up. If you can, to test it, you can loosen the exhaust flange where the exhaust connects to the manifold creating a good sized gap. This will reduce the back pressure being created by the clogged cat. It's going to be loud as heck, so I wouldn't recommend driving it around town. But If the truck doesn't loose power with the exhaust separated, then you have your problem solved. Replace the cat.

1 out of 1 people think this is helpful.
20

Ok i have a 2004 gmc Sierra 1500 yesterday it just lost all power does not have no Juice won't even turn over checked everything that possible could be what do you think it could be

2 out of 2 people think this is helpful.

Your Answer

Add photo

Related Questions

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 57,945 nationwide Sierra 1500 listings starting at $2,495.

ZIP:

Search GMC Sierra 1500 Questions

GMC Sierra 1500 Experts

#1 dragonflyoffshore
dragonflyoffshore
Reputation 4,500
#2 John Saffrahn
John Saffrahn
Reputation 3,150
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 2,750
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,629 Great Deals out of 148,912 listings starting at $1,800
Used Ford F-150
3,363 Great Deals out of 205,120 listings starting at $1,273
Used GMC Sierra 2500HD
134 Great Deals out of 13,624 listings starting at $1,500
Used Dodge Ram 1500
534 Great Deals out of 12,919 listings starting at $1,800
Used Toyota Tundra
666 Great Deals out of 28,200 listings starting at $1,599
Used Chevrolet Silverado 2500HD
423 Great Deals out of 28,785 listings starting at $2,295
Used Toyota Tacoma
755 Great Deals out of 33,396 listings starting at $2,988
Used GMC Yukon
527 Great Deals out of 17,619 listings starting at $1,777
Used Chevrolet Tahoe
1,070 Great Deals out of 31,943 listings starting at $1,495
Used Ford F-250 Super Duty
476 Great Deals out of 42,689 listings starting at $2,850
Used GMC Sierra 1500HD
7 Great Deals out of 125 listings starting at $4,988
Used Chevrolet Camaro
660 Great Deals out of 39,410 listings starting at $2,995
Used GMC Sierra 2500
4 Great Deals out of 187 listings starting at $6,990

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
5 Great Deals out of 27,734 listings starting at $23,800
2016 GMC Sierra 1500 For Sale
77 Great Deals out of 7,208 listings starting at $19,400
2015 GMC Sierra 1500 For Sale
191 Great Deals out of 4,668 listings starting at $15,999
2014 GMC Sierra 1500 For Sale
201 Great Deals out of 4,420 listings starting at $14,971
2013 GMC Sierra 1500 For Sale
144 Great Deals out of 2,581 listings starting at $10,995