I have a 2002 GMC Sierra 1500 5.3l. My truck has a miss fire when heavy in the throttle. No codes when it is scanned.

Asked by Apr 13, 2015 at 07:57 PM about the 2002 GMC Sierra 1500 SLE 4WD Extended Cab SB

Question type: Maintenance & Repair

7 Answers

170

Could be a clogged injector or simply bad fuel.when was your last tune up or service?

170

Try adding a Fuel injector cleaner & or your air filter.

170

If white smoke is visible, could be the PCV valve which will cause the engine to Bog Down & loose power. That is part of an annual/recommended tune up.

In the past month I changed all 4 O2 sensors, new plugs and wires,and fuel filter. I did have a code for 2 of the O2 sensors so I changed all 4. I put 350 miles on the truck since the plugs and wires, no codes have came up but still same problem.

170

Timing chain & or gears maybe worn. Cracked coil, p/u module in distributor may need to be replaced.

Is there a way to determine what is wore or needs replaced.

Thanks, I guess I'm going to start with the easiest and cheapest and go from there. I keep driving the truck in hopes it will throw a code

Your Answer

Add photo

Related Questions

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 68,235 nationwide Sierra 1500 listings starting at $1,800.

ZIP:

Search GMC Sierra 1500 Questions

GMC Sierra 1500 Experts

#1 dragonflyoffshore
dragonflyoffshore
Reputation 5,270
#2 John Saffrahn
John Saffrahn
Reputation 3,640
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 3,330
View All

Related Models For Sale

Used Chevrolet Silverado 1500
1,930 Great Deals out of 182,792 listings starting at $999
Used Ford F-150
2,086 Great Deals out of 191,509 listings starting at $290
Used GMC Sierra 2500HD
129 Great Deals out of 12,724 listings starting at $2,185
Used Toyota Tundra
447 Great Deals out of 34,302 listings starting at $1,950
Used Dodge Ram 1500
405 Great Deals out of 10,890 listings starting at $1,000
Used Toyota Tacoma
562 Great Deals out of 42,404 listings starting at $1,995
Used GMC Yukon
439 Great Deals out of 20,486 listings starting at $1,495
Used Chevrolet Silverado 2500HD
303 Great Deals out of 28,743 listings starting at $2,995
Used Chevrolet Tahoe
598 Great Deals out of 33,193 listings starting at $1,375
Used Ford F-250 Super Duty
326 Great Deals out of 43,864 listings starting at $1,450
Used Chevrolet Camaro
373 Great Deals out of 31,271 listings starting at $2,500

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
86 Great Deals out of 43,467 listings starting at $23,368
2016 GMC Sierra 1500 For Sale
96 Great Deals out of 3,460 listings starting at $17,670
2015 GMC Sierra 1500 For Sale
99 Great Deals out of 4,319 listings starting at $12,899
2014 GMC Sierra 1500 For Sale
96 Great Deals out of 4,232 listings starting at $13,995
2013 GMC Sierra 1500 For Sale
49 Great Deals out of 1,967 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.