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So I’ve officially lost my mind from this steering wheel shake that I’ve lived with for 1.5 years on my 45th anniversary LS3 car and basically decided to replace the entire suspension (almost). One day around 75k miles I had my car aligned and new tires mounted and balanced at a tire choice & since then it has had a steering wheel shake under acceleration/cruising between 50-80mph and even more vibration when braking at those speeds. At first I blamed the tires and had sent them back and got a new set of Firestone firehawk indy 500’s but didn’t get better. Had them re balance the tires I’m not kidding 6 different times between 2 of their shops including road force, still shaking steering wheel at 50-80. First thing I did was change my front rotors and pads, no change. Chevy charged me $400 to tell me it was the center support bearing. I changed the entire driveshaft, center support bearing and giubos, no change.

The car is on stock suspension with BMR lowering springs installed since about 10k miles. Car now has 95k miles and is turning 13 years old with a notably weak driver side shock / spring and as of the last thousand miles or so a clunk has developed in the passenger rear when going over bumps / turning to park.
Figured I’d share what I’m installing now to upgrade my old suspension and (hopefully) fix my problem for anyone in the same boat.

Pedders extreme XA coilovers
Pedders sportsryder front & rear adj. sway bars
Pedders rear subframe bushings poly inserts
Pedders rear sway bar end links
Detroit speed HD front sway bar end links
BMR non adjustable toe rods
BMR trail arms
BMR poly trail arm knuckle bushings
BMR rear upper control arm poly bushings
BMR front radius rod poly bushings
Moog upper & lower front control arms
Moog inner / outer tie rods
Indy 500 ultra performance summer street tires

I’m also replacing my original fluids for:
Redline D4 ATF transmission fluid
ACDelco LS Differential fluid (OEM)
Motul RBF 600 DOT4 Brake fluid
ACDelco Radiator fluid (OEM)

And have already changed out Injectors, spark plugs, wires and coil packs. Going to seafoam spray the intake, clean the MAF sensor & clean out my air intake filter, clean the engine bay and install a new air cabin filter.

Did I miss anything? Thinking it should more or less feel like a completely different car once I’m done.