Experiencing loss of power, especially going up hills

20

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

11,675

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..

3 of 3 people found this helpful.
20

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.

2 of 2 people found this helpful.
11,675

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.

2 of 2 people found this helpful.
30

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

3 of 3 people found this helpful.

Your Answer

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 68,023 nationwide Sierra 1500 listings starting at $1,699.

ZIP:

GMC Sierra 1500 Experts

  • #1
    dragonflyoffshore
    Reputation
    5,300
  • #2
    John Saffrahn
    Reputation
    3,660
  • #3
    Glenn Clingenpeel
    Reputation
    3,350
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,146 Great Deals out of 183,298 listings starting at $1,693
Used Ford F-150
2,236 Great Deals out of 181,369 listings starting at $1,500
Used GMC Sierra 2500HD
108 Great Deals out of 13,212 listings starting at $3,900
Used Toyota Tundra
433 Great Deals out of 33,696 listings starting at $1,999
Used Dodge Ram 1500
411 Great Deals out of 10,701 listings starting at $1,500
Used Toyota Tacoma
552 Great Deals out of 42,058 listings starting at $2,999
Used Chevrolet Silverado 2500HD
348 Great Deals out of 29,278 listings starting at $2,650
Used GMC Yukon
409 Great Deals out of 20,824 listings starting at $1,495
Used Chevrolet Tahoe
624 Great Deals out of 36,241 listings starting at $1,800
Used Ford F-250 Super Duty
331 Great Deals out of 43,471 listings starting at $1,250
Used Chevrolet Camaro
422 Great Deals out of 31,785 listings starting at $2,395

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
80 Great Deals out of 39,539 listings starting at $23,369
2016 GMC Sierra 1500 For Sale
93 Great Deals out of 3,435 listings starting at $17,977
2015 GMC Sierra 1500 For Sale
112 Great Deals out of 4,464 listings starting at $15,922
2014 GMC Sierra 1500 For Sale
120 Great Deals out of 4,700 listings starting at $12,987
2013 GMC Sierra 1500 For Sale
46 Great Deals out of 1,959 listings starting at $8,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.