The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Need ideas. 15yr old vibration that just won't go away

Tom · 02-08-2021, 09:00 PM

Wow Keith, thats amazing info.

As for some questions posed:
Cap, rotor, and wires have been changed in the trucks life with me without changing the vibration. I have always used R44LTS plugs after I got the truck. I'm positive its not an engine running issue only because I cannot replicate the issue regardless of rpm or load once the truck is rolling, and I was getting 22mpg for a long time with the issue still there.
I also don't think its tire rub, as it did this when stock.
Exhaust is mostly stock except muffler replaced and turn down on the muffler exit so less exhaust system in there these days.

I highly appreciate all the ideas, thank you!

02-08-2021, 09:00 PM	#12
Tom driving is in my blood Join Date: Dec 1999 Location: Mesa AZ Posts: 5,698	Re: Need ideas. 15yr old vibration that just won't go away Wow Keith, thats amazing info. As for some questions posed: Cap, rotor, and wires have been changed in the trucks life with me without changing the vibration. I have always used R44LTS plugs after I got the truck. I'm positive its not an engine running issue only because I cannot replicate the issue regardless of rpm or load once the truck is rolling, and I was getting 22mpg for a long time with the issue still there. I also don't think its tire rub, as it did this when stock. Exhaust is mostly stock except muffler replaced and turn down on the muffler exit so less exhaust system in there these days. I highly appreciate all the ideas, thank you! __________________ -78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me.