Be careful with those Chevy airbags, especially offroad. Probably want to look into which fuses to pull before you even think of taking it off the pavement.
https://youtu.be/U6b_93QZ2fM?t=283
https://jalopnik.com/chevrolet-colorado-side-curtain-airbags-keep-deploying-1828951213
One other issue that isn't really considered much - the rotors. It does happen that rotors are out of balance. An easy start is to clock the rotor one or two studs around and see if anything changes.
I have a few quick questions for people with the shimmy issue?
What is your toe set to?
Caster?
Wheel offset/spacers?
Suspension - did you "level" it?
OWNER SHIP TAKEN OF THE ZR2. Love this thing. No issues thus far but we will see how that plays out. I will post an update in a few months time.
Did I read you correctly? Did you take this off the dealer lot and immediately have the problem you're posting about, THEN do a lift and change tires? Did you not return to the dealership with the stock vehicle and the complaint, before doing mods? Trying to get the story straight, that's all.That thought came across my mind however no other people have had to do this on the 4Runner that I could find. Speeds are above needle bearing signs from my reasearch too. Lift did nothing as this all started the night I took it off the lot 100% stock. I’m sure it’s simply the geometry that makes the front end/ steering overly sensitive which is not something I want to be dealing with over and over to make it smooth.
Did I read you correctly? Did you take this off the dealer lot and immediately have the problem you're posting about, THEN do a lift and change tires? Did you not return to the dealership with the stock vehicle and the complaint, before doing mods? Trying to get the story straight, that's all.
This.. I had a bad shimmy in the steering wheel and ended up replacing my pads/rotors AND getting them road force balanced in order for it to go away. I will admit, it has the tiniest shimmy now, way better than before.
However the new ZR2's are sweet. Two of my buddies picked up the diesel version and we took them to moab. I was jealous of the fuel economy they were getting versus my 4runner.
![]()
Wow!
Are those Chevys bone stock??
Only one dealer in town and they suck in this whole experience to say the least. Swapped from stock to aftermarket and back to stock. Same thing.
Yes they are! It's the stock stuff you can't see that makes them even more offroad capable.
From what I can see they look pretty good. Much better than other stock pick ups. Perhaps the Ranger at some trim level will rival it when it comes out here in the US. The Chevy looks good though.
Most are wowed by how "built" the ZR2 looks stock. This is easy to accomplish when you cut away the front corners of the bumper to reveal the entire wheel well, it's an illusion of clearance and height. The parts that come into contact with ground underneath, you know the stuff that actually matters, is lower than a stock 4Runner.
Don't get me wrong here, I am in no way bashing on the ZR2, I like them and applaud GM for bringing a fierce competitor to the table in this segment, but don't be fooled by simple body work modifications.
While what you are saying is correct, 8.9" vs 9.6", the cut away corners give a much more aggressive approach/departure angles, which is widely useful in it's own right, even without the ground clearance in certain instances.
Personally I think it's easier to actually lift the truck than to start modifying bumpers, body panels, fenders.
Being a desert guy, it’s not really the ground clearance that is holding me back now. I don’t really feel like chopping up the bumper or buying a new one to get the same result on my 4Runner either.