Silverado 5.3 L is misfiring

Asked by Mar 16, 2015 at 07:43 PM about the 2000 Chevrolet Silverado 1500 LS Short Bed 2WD

Question type: Maintenance & Repair

My Silverado has a misfire when a
load is put on the motor ie going
up a steep grade or hill. Cruising
down the highway at 55 mph,
transmission in overdrive, the
rpm's drop to around 1500 or 1400
the motor starts misfiring. I
usually drive with the cruise
engaged and if the rpm's drop any
further it will kick into passing
gear and everything smooths out.
If you put your foot in it, the thing
will spit and spat and even
backfire before you get up enough
power to pass or finish climbing
the hill.

Get this, I got someone to connect
a code reader to it. NO CODES! I
replaced the fuel filter under the
cab. No good.

Do I have a bad spark plug? Bad
plug wire? Or do I have an internal
problem that the truck computer
brain will not pick up?

9 Answers

110

Has the check eng light ever come on while it's acting up

1 of 1 people found this helpful.

Check engine light has never come on. I get the usual like, change oil, low washer fluid, low coolant and such but no check engine.

110

you're going to have to have a scanner hooked up while it's doing it then you can see live What cylinders are misfiring.it is a 5.3 and not a 5.7.right just making sure

5.3, that's the 327 I believe and the 5.7 is a 350? I have a 5.3 according to the vin#

110

Need that scanner .you will save way more money that way than guessing

How much for one? I've never priced them.

66,145

If your Silverado has over 100,000 miles on it you're due for a tune up. If the engine is truly misfiring under load the check engine light would be on or flashing. Try the tune up, if you're due for one and go from there. To me it sounds like an ignition problem. HTH. -Jim

That was my first guess but it's a little strange that the check engine light or any codes haven't come up. Anyway, you are correct, it is due for a tune up. Thanks for your help Jim and sagomonkey! I appreciate it! Think I'll start doing a little customizing now.

66,145

You're welcome. Glad to help. - Jim

Your Answer

Add photo

Related Questions

Silverado 1500

Looking for a Used Silverado 1500 in your area?

CarGurus has 175,751 nationwide Silverado 1500 listings starting at $1,250.

ZIP:

Search Chevrolet Silverado 1500 Questions

Chevrolet Silverado 1500 Experts

#1 John Carson
John Carson
Reputation 2,200
#2 Rowefast
Rowefast
Reputation 1,840
#3 Silverado_owner_2006
Silverado_owner_2006
Reputation 1,630
View All

Related Models For Sale

Used GMC Sierra 1500
822 Great Deals out of 68,199 listings starting at $2,484
Used Ford F-150
2,194 Great Deals out of 206,316 listings starting at $1,499
Used Dodge Ram 1500
455 Great Deals out of 11,152 listings starting at $700
Used Chevrolet Silverado 2500HD
306 Great Deals out of 27,742 listings starting at $1,250
Used Toyota Tundra
443 Great Deals out of 34,312 listings starting at $2,700
Used Toyota Tacoma
541 Great Deals out of 40,814 listings starting at $2,495
Used Chevrolet Tahoe
550 Great Deals out of 29,234 listings starting at $1,699
Used Chevrolet Camaro
225 Great Deals out of 30,943 listings starting at $1,217
Used Ford F-250 Super Duty
346 Great Deals out of 46,938 listings starting at $1,895
Used Chevrolet Silverado 2500
8 Great Deals out of 266 listings starting at $3,488
Used Chevrolet Silverado 1500HD
18 Great Deals out of 258 listings starting at $3,985
Used Ford Mustang
476 Great Deals out of 45,735 listings starting at $1,999

Used Cars For Sale

2017 Chevrolet Silverado 1500 For Sale
79 Great Deals out of 123,597 listings starting at $19,843
2016 Chevrolet Silverado 1500 For Sale
135 Great Deals out of 5,649 listings starting at $18,895
2015 Chevrolet Silverado 1500 For Sale
191 Great Deals out of 7,393 listings starting at $12,950
2014 Chevrolet Silverado 1500 For Sale
254 Great Deals out of 10,276 listings starting at $10,900
2013 Chevrolet Silverado 1500 For Sale
147 Great Deals out of 4,968 listings starting at $7,650

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.