Adjustable Shock Height

[vettekat]

Anyone know anything about how the Z51 coil over shocks are adjustable? Is it just a matter of turning a nut like you can do on the C7? How easy is it to access whatever it is you need to access to make an adjustment? Any info would help make a decision on whether to order the front lift system or not. Thanks

[John]

We are close to 100% confirmed, that your just jack up your car, insert a jack-stand, remove the wheel, use a couple of spanner wrenches, one open ended box wrench, and then reverse the process; Do the remaining three corners. Easy peasy.

BTW, while already posted yesterday in case anyone missed it, the adjustability is on both the FE3 (Z51) and the FE4 (Z51 & mag ride) suspensions. That was confirmed by Harlan in an email to me yesterday.

[Foreverfuelie]

And then, you will “likely” want to drive to your nearest Dealer/Alignment Shop and at least have your alignment checked and/or re-adjusted. Hopefully, GM will offer the one time free alignment check as they did on the C7’s.

[Sparro]

We are close to 100% confirmed, that your just jack up your car, insert a jack-stand, remove the wheel, use a couple of spanner wrenches, one open ended box wrench, and then reverse the process; Do the remaining three corners. Easy peasy.

BTW, while already posted yesterday in case anyone missed it, the adjustability is on both the FE3 (Z51) and the FE4 (Z51 & mag ride) suspensions. That was confirmed by Harlan in an email to me yesterday.

John, is the suspension still adjustable on the front with the E60 front end lift and how low can we get it from stock height?

[John]

Yes if you have a Z51 (with or without mag ride), and have or do not have E60, the height is adjustable. We do not yet have a measurement of how much the adjustable spring perches would height amount give us however. Hence we have no idea yet how low we could get it.

I doubt we would get the car below the pavement.

[vettekat]

On the C7 you did not need to remove the wheel to reach the adjusting nut. I just jacked the car up and used a stand for safety while sliding under the car.

[majic1980]

Yes if you have a Z51 (with or without mag ride), and have or do not have E60, the height is adjustable. We do not yet have a measurement of how much the adjustable spring perches would height amount give us however. Hence we have no idea yet how low we could get it.

I doubt we would get the car below the pavement.

THANKS SOOOO MUCH for that information, somewhere else I saw a post that stated “ IF “ you had E60 ( front-end lift ) the ride heights weren’t adjustable.

[John]

majic1960, when I posted that, that was commonly held fact, but no more. Right now we are all scrambling to hopefully confirm that. We will have a definitive answer soonest possible.

[Jljordann922]

So here are some closer pics I believe....I see where a spanner wrench will go on the rear...but not sure how youd lower the front (maybe its a minimal groove I can't see) .... im not great mechanically so please share lol

[Swift93]

Another consideration when changing spring perch height is changing the amount of weight each wheel carries. Not sure the factory sets up the suspension with such care, but for competition or autocross you may find wheel locking if you get the chassis jacked around. Also, I presume the suspension geometry dictates a particular ride height for proper bump steer.

[vettekat]

So, if I understand correctly, ride height is NOT adjustable unless you have Z51?

[Klinn]

So, if I understand correctly, ride height is NOT adjustable unless you have Z51?

That's correct, you need the Z51 package to get the adjustable sprint perches. However, if you add the E60 front lift, you can no longer adjust the front perches even if you have the Z51. Since it doesn't make much sense to adjust only the rear, basically adding E60 nullifies the adjustable feature of the Z51 package.

[RoketRdr]

So here are some closer pics I believe....I see where a spanner wrench will go on the rear...but not sure how youd lower the front (maybe its a minimal groove I can't see) .... im not great mechanically so please share lol

The front suspension pic you posted is showing it with the lift system so that’s why you don’t see the spanner nut. On a non-lift front shock you wouldn’t see the lower “accordion” piece and it would be replaced with a spanner nut.