99 Tahoe knocking when driving

Asked by Jan 22, 2016 at 01:23 AM about the 1999 Chevrolet Tahoe 4 Dr LS 4WD SUV

Question type: Maintenance & Repair

Have a p0305 code, replaced spark plugs, wires, distributor cap, rotor, and the control module. Knocking is getting worse. Now it shutters in idle. I'm semi mechanical. Need help.
It's a 99 Tahoe 5.7 vortec. With 196022 miles.

5 Answers

45

Sounds like a misfire on one or more cylinders. It would be a good idea to replace what the scanner code reads. Have u replaced any of that stuff? Especially the SPARK PLUGS! Where does it sound like the knock is coming from? Knock from motor? Knock from electrical component?

69,715

po305 is a miss fire on cylinder #5. There is a issue going on with that cylinder. I suspect the rod bearing if you say it is knocking. The sensor is picking up the delay in firing and vibration. (knock sensor) If that plug looks like it is firing and looks clean, normal, I would suspect the rod bearing.

1 of 1 people found this helpful.

I've replaced all those those things, it sounds like a hammer slamming the motor. And starts when rpm gets to 1.5k

69,715

Either crank bearings or check the torque converter bolts. Something spinning causing the noise.

1 of 1 people found this helpful.
18,275

A misfire shouldn't make knocking noises. You got bigger issues.

Your Answer

Add photo

Related Questions

  • Oil pressure light an loud engine knocking 2 answers

    My 2000 Chevy Tahoe has a loud knocking sound and the oil pressure light comes on

    2000 Chevrolet Tahoe LS

    -

    Maintenance & Repair

  • 99 Chevy Tahoe 1 answer

    I have a 99 Tahoe and in park the engine sounds beautiful. But as soon as you put it drive it won't run over 10 mph. Then it stops and starts over from 0 mph back to 10mph.

    1999 Chevrolet Tahoe 4 Dr LS SUV

    -

    Maintenance & Repair

  • 99 tahoe 3 answers

    I kept hearing something clicking under my hood while driving. Come to find out a spark plug burned off and a spark comes from one end of the wire... If i take it off will it still run until i rep...

    1999 Chevrolet Tahoe

    -

    Maintenance & Repair

  • my dive shaft came out of my 99 chevy tahoe 4x4 automatic how far can I drive it in 4 hi? 1 answer

    My whoke drive shaft came out where the front joint goes in the drive shaft the cap cameoff ither day and wwarped the hole , how far can I drive it in 4 hi ? And what other year model can I use in ...

    1999 Chevrolet Tahoe 4 Dr LT 4WD SUV

    -

    Maintenance & Repair

  • How long is the life of a tahoe on average. THANKS 21 answers

    We are about to purchase a 04 z71 Tahoe it has 98,000 miles. How long is the life of a tahoe on average. THANKS

    2004 Chevrolet Tahoe Z71 4WD

    -

    General

Tahoe

Looking for a Used Tahoe in your area?

CarGurus has 29,234 nationwide Tahoe listings starting at $1,699.

ZIP:

Search Chevrolet Tahoe Questions

Chevrolet Tahoe Experts

#1 Tom Demyan
Tom Demyan
Reputation 800
#2 Rowefast
Rowefast
Reputation 780
#3 Lucia Taylor
Lucia Taylor
Reputation 490
View All

Related Models For Sale

Used GMC Yukon
374 Great Deals out of 18,226 listings starting at $2,950
Used Chevrolet Suburban
323 Great Deals out of 19,720 listings starting at $2,000
Used Cadillac Escalade
239 Great Deals out of 11,197 listings starting at $2,495
Used Chevrolet Silverado 1500
1,718 Great Deals out of 175,749 listings starting at $1,250
Used Ford Expedition
473 Great Deals out of 24,887 listings starting at $700
Used Ford Explorer
944 Great Deals out of 72,519 listings starting at $1,000
Used Ford F-150
2,191 Great Deals out of 206,316 listings starting at $1,499
Used Jeep Grand Cherokee
1,023 Great Deals out of 74,887 listings starting at $750
Used Toyota 4Runner
249 Great Deals out of 20,494 listings starting at $1,800
Used Dodge Durango
274 Great Deals out of 22,704 listings starting at $1,200
Used GMC Yukon XL
237 Great Deals out of 12,302 listings starting at $2,950
Used GMC Sierra 1500
822 Great Deals out of 68,199 listings starting at $2,484

Used Cars For Sale

2017 Chevrolet Tahoe For Sale
18 Great Deals out of 12,539 listings starting at $34,398
2016 Chevrolet Tahoe For Sale
54 Great Deals out of 2,461 listings starting at $31,449
2015 Chevrolet Tahoe For Sale
38 Great Deals out of 2,054 listings starting at $28,500
2014 Chevrolet Tahoe For Sale
19 Great Deals out of 644 listings starting at $11,995
2013 Chevrolet Tahoe For Sale
37 Great Deals out of 1,409 listings starting at $12,700

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.