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

10,965

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.
10,965

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.
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 out of 3 people think this is helpful.

Your Answer

Add photo

Related Questions

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 65,980 nationwide Sierra 1500 listings starting at $1,995.

ZIP:

Search GMC Sierra 1500 Questions

GMC Sierra 1500 Experts

#1 dragonflyoffshore
dragonflyoffshore
Reputation 4,910
#2 John Saffrahn
John Saffrahn
Reputation 3,490
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 3,060
View All

Related Models For Sale

Used Chevrolet Silverado 1500
1,771 Great Deals out of 166,158 listings starting at $1,950
Used Ford F-150
2,238 Great Deals out of 208,514 listings starting at $1,499
Used GMC Sierra 2500HD
115 Great Deals out of 14,525 listings starting at $2,650
Used Toyota Tundra
490 Great Deals out of 33,145 listings starting at $3,400
Used Dodge Ram 1500
439 Great Deals out of 11,285 listings starting at $1,000
Used Toyota Tacoma
489 Great Deals out of 38,932 listings starting at $2,900
Used Chevrolet Silverado 2500HD
320 Great Deals out of 26,736 listings starting at $1,250
Used GMC Yukon
364 Great Deals out of 16,961 listings starting at $2,500
Used Chevrolet Tahoe
574 Great Deals out of 27,339 listings starting at $999
Used Ford F-250 Super Duty
368 Great Deals out of 47,345 listings starting at $1,795
Used Chevrolet Camaro
161 Great Deals out of 32,677 listings starting at $1,995
Used GMC Sierra 2500
164 listings starting at $4,995

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
38 Great Deals out of 41,197 listings starting at $20,121
2016 GMC Sierra 1500 For Sale
83 Great Deals out of 3,761 listings starting at $17,695
2015 GMC Sierra 1500 For Sale
102 Great Deals out of 3,884 listings starting at $15,400
2014 GMC Sierra 1500 For Sale
103 Great Deals out of 4,230 listings starting at $14,495
2013 GMC Sierra 1500 For Sale
72 Great Deals out of 2,140 listings starting at $9,260