I have 2001 Silverado 1500 I have replaced the brakes rotors calipers and wheel bearings at this point. The sound only happens when I’m driving and hit the gas lightly and it’s at around 1100-1500 rpm. Any recommendations on what the problem is because I’m lost at this point. If I slam on gas the sound doesn’t speed up or can’t be heard if I let off gas while driving it goes away. If it helps the garage though it was the wheel bearings as that’s the kind of sounds it’s making but those didn’t fix the problem. Also to add this sound just a single thump if I keep a steady pace it’ll keep making the sound as long as my foots on the gas enough to maintain speed

 

Is your Silverado a 2WD or a 4WD?

 

4wD 1500

 

Have you checked the inner and outer CV joints for excessive looseness or play (compare left side outer to right side outer, left side inner to right side inner)?

 

when you say excessive play would this be like grabbing the axle where the to joints connect and checking for movement? All I’ve done is grabbed where they connected on what looks like a bar and tried to shake it back and fourth to see if there was play. Which there was a little bit of play but not a so much it caused me any concern? Could this be the culprit. I have had others tell me could be the u joints but I don’t really know if that would be it since it only makes it if the gas is pressed down enough to keep a steady speed

 

My rear U-Joints were extremely corroded in my 2002. sounded like an animal "squeeling" under slight load of the gas pedal. 13 dollars later... all fixed! And I grease them 4 times a year now!
Scott

 

hmm may try to to replace them since the u joints are a cheaper to replace than other things my sounds not really a squeal it’s more of a rub/thump

 

I would jack up the front end, put it on jack stands and see if you can spin the wheels by hand forward and backward without any real difference in slap and compare the two sides to one another - sort of a quick and dirty check of the half shaft CV joints.. You can also check your u-joints while you have the truck on jack stands. If you can move the driveshaft at a particular u-joint, then you have found a sloppy u-joint and know it should be replaced.

 

thanks I’ll try it this weekend if weather permits. I noticed today when I put the truck in reverse it clunked. But i Didn’t really try to sit and see if it was going to do it again as I was running late and haven’t noticed when putting in drive, but I’ll be sure to update this weekend on what I find out.

 

Skylar, Squeel or "Grinding" but only for a split second... All of the Needle Bearings were crushed and ground into rust dust... only 1 of the 4 caps had this so It made noise as the load transferred to that cap I guess... Stumped me for months! whenever I grabbed the driveshaft and twisted, pulled, and moved around it all seemed tight...
Only under slight acceleration would it happen but sounded like *** on the boat ramp! Cheap fix if that's what it is and if not... Preventative Maintenance! Just make sure you buy the U-Joint that has the grease fitting!
Scott