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

11,395

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 of 1 people found this 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 of 1 people found this helpful.
11,395

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 of 1 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

Add photo

Related Questions

  • Experiencing loss of power, especially going up hills 4 answers

    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 an...

    2001 GMC Sierra 1500

    -

    Maintenance & Repair

  • Loss of engine power 2 answers

    I changed my air filter and my 2009 gmc. Shortly after check engine light came on as well as loss or engine power. I changed it back but I still have the same problem.what did I do wrong?

    2009 GMC Sierra 1500 SLE1 Ext. Cab LB

    -

    Maintenance & Repair

  • rough idle, stalling, loss of power. 228 answers

    o2 sensor code 44 (lean) Replaced: coolant temp sensor, tps, map sensor, fuel filter, and o2 sensor. It will run normal on occasion but only lasts about 45 seconds or so. I don't think its the torqu...

    1995 GMC Sierra 1500 K1500 SL 4WD Extended Cab Stepside SB

    -

    Maintenance & Repair

  • has no power going up hill with small boat on, on flat ground runs good 1 answer

    had transmission repaired and engine tuned up but can walk faster up hills with 22 ft boat trailer on. ON flat ground unit runs out good, no check engine lights on, last time going to lake was running...

    2004 GMC Sierra 1500 2 Dr SLE Standard Cab LB

    -

    Maintenance & Repair

  • why do i lose power on hills 14 answers

    I lose power on hills change the fuel pump and checked timing changed catalytic converters almost like a restriction but nothing shows on the computer

    2000 GMC Sierra 1500 SLE Standard Cab LB

    -

    Maintenance & Repair

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 69,126 nationwide Sierra 1500 listings starting at $1,850.

ZIP:

Search GMC Sierra 1500 Questions

GMC Sierra 1500 Experts

#1 dragonflyoffshore
dragonflyoffshore
Reputation 5,090
#2 John Saffrahn
John Saffrahn
Reputation 3,560
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 3,220
View All

Related Models For Sale

Used Chevrolet Silverado 1500
1,772 Great Deals out of 181,204 listings starting at $250
Used Ford F-150
2,059 Great Deals out of 207,350 listings starting at $1,499
Used GMC Sierra 2500HD
98 Great Deals out of 13,465 listings starting at $2,650
Used Toyota Tundra
438 Great Deals out of 34,679 listings starting at $2,990
Used Dodge Ram 1500
412 Great Deals out of 10,832 listings starting at $1,400
Used Toyota Tacoma
473 Great Deals out of 41,593 listings starting at $1,995
Used GMC Yukon
381 Great Deals out of 19,298 listings starting at $2,000
Used Chevrolet Silverado 2500HD
301 Great Deals out of 28,182 listings starting at $2,495
Used Chevrolet Tahoe
557 Great Deals out of 31,373 listings starting at $1,500
Used Ford F-250 Super Duty
330 Great Deals out of 46,264 listings starting at $1,450
Used Chevrolet Camaro
245 Great Deals out of 31,195 listings starting at $369
Used GMC Sierra 1500HD
5 Great Deals out of 116 listings starting at $2,995

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
51 Great Deals out of 45,359 listings starting at $23,408
2016 GMC Sierra 1500 For Sale
88 Great Deals out of 3,573 listings starting at $17,671
2015 GMC Sierra 1500 For Sale
105 Great Deals out of 4,042 listings starting at $14,999
2014 GMC Sierra 1500 For Sale
101 Great Deals out of 4,284 listings starting at $14,495
2013 GMC Sierra 1500 For Sale
47 Great Deals out of 1,924 listings starting at $10,950

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.