Knocking noise on suburban
CF Veteran
Joined: Aug 2010
Posts: 1,054
Likes: 5
From: New York City USA
DO me a favor bro, and take a minute and actually make a checklist of the problem. I m not sure if its rattling, knocking or tapping. And open the hood and try to isolate the sound. From what you said, I think its a driveline/suspension part. But others say its a lower end engine situation. I m not sure then WHY the noise goes away on braking. I had a situation with a Mercury station wagon that did that rattling sound that went away on braking and when I put it on the lift the hold down bolts on the caliper were loose. Just an idea...and direction to look in.
Engine noises have nothing to do with turning or braking and would perceptively be louder on acceleration or under load. A connecting rod would rattle more as it slapped around the bore under load. But sloppy tie rods, sway bar links, pitman arm/idler arm bushings, and rotted bushings in the control arms can cause clanking especially on poor road conditions. CV joints can cause noise on turns. And broken hub solenoids, loose axle nuts, hold down bolts cause rattling on coast and go away on braking.
Engine noises have nothing to do with turning or braking and would perceptively be louder on acceleration or under load. A connecting rod would rattle more as it slapped around the bore under load. But sloppy tie rods, sway bar links, pitman arm/idler arm bushings, and rotted bushings in the control arms can cause clanking especially on poor road conditions. CV joints can cause noise on turns. And broken hub solenoids, loose axle nuts, hold down bolts cause rattling on coast and go away on braking.
CF Beginner
Joined: Apr 2011
Posts: 1
Likes: 0
hey bro with the 97 suburban. i have a 97 suburban sle 5.7l v8 i had the same knockin noise as you with the same symptoms the other day when i was drivin a trailer full of hay it got louder but only when i stepped on it. today on my way to school i ended up throwing a connecting rod through my oil pan. so if i were you i would get it looked at or look into it yourself but into more detail. also if you blow a rod dont try and start it your just gonna cease the engine then your screwed
CF Beginner
Joined: Apr 2013
Posts: 1
Likes: 0
New need help and kind of related to topic
I have a 96 Chevrolet suburban and I hear knocking when in park reverse drive 3 2 and 1 when I accelerate from a stop light or on a stop a quick knocking noise happens quickly about 2 sec or 3 then normal again I don't know if it's transmission going out , or what ? I have towed twice a trailer holdin atleast 3500lbs after towing it started the noises it has roughly 189,000 miles need help sorry about posting in existing new to this and can't find new thres on this small screen message or reply back need help ASAP thanks for you time
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crackerjack8501
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Apr 7, 2021 7:56 AM
