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Rattling noise

Tiny
SEAN SILBERHOLZ
  • MEMBER
  • 1993 CHEVROLET SILVERADO
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 14,000 MILES
Hi, when I am driving I hear like a clicking or rattling noise under the truck. I checked the u-joints their was no play in them. If I am in park and hit the gas it does not do it. I have also shifted into neutral while it is coasting and hit the gas and I get no noise. Their are no grease fittings so I cannot grease them to tell if that is the problem. Is there a way to put grease in them without having the grease fitting? I am not sure what else it could be. Also, I had a question about 4L what is the fastest you can go in it. I have heard no more than ten mph. Thanks. This is a K1500 extended cab. Also this noise has gotten wore over the last few months.
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Friday, September 8th, 2017 AT 11:03 PM

2 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
This sounds like you have a muffler baffle that has come loose inside and you need a new muffler. With the engine off try to bang on the muffler to see if you can get it to make the noise. This is a common problem.

Please let us know what happens.

Cheers, Ken
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Saturday, September 9th, 2017 AT 6:09 PM
Tiny
STEVE W.
  • MECHANIC
  • 13,573 POSTS
On the 4 low speed limit, on most you do not want to exceed about twenty mph. The engine will be screaming at you at that point.
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Saturday, September 9th, 2017 AT 6:56 PM

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