[Chris V]

GM has released the eLSD Calibration that Shaun Bailey and Alex Doss had in the winning car in CAMC at the 2017 SCCA Solo Nationals.

Part number 84506758 is for 2017 and 2018 SS 1LEs.

Cliffs: you pay, maintains warranty, only works with all nannies off, faster locking and unlocking. Car stays the same for all PTM modes as it was prior.

Note to Dealers:
When reprogramming the Chassis Control Module, please call Techline Customer Support Center (TCSC)
at (1-800-828-6860). The TCSC will provide programming requirements and instructions. When calling
TCSC, please insure the specific vehicle VIN is on hand.
Dealer Piece Cost for Calibration will be billed to the BARS/Open Account monthly via Techline. Dealer
Statement will include the 17- digit VIN, Part Number Reference “eLSD" and Dealer Piece Cost. The
labor for download and re-flash of the module is to be charged to labor OP 0602518 at an allowable 0.3
hours.
Warranty Information:
Reflashing the eLSD Control Module with this calibration maintains the vehicle’s warranty.
Calibration Details:
Continuous on-track and street development combined with the pursuit of perfection have pushed our
Camaro engineers to develop an eLSD calibration that will enable faster turn in and faster power
application on turn exit. This eLSD calibration will decouple the differential at a faster rate based on
accelerator pedal position and steering wheel angle to enable faster yaw rotation at corner entry and
upon corner exit the eLSD will couple faster than normal rates to enable power to be delivered sooner
to both rear wheels.
Note: The change of eLSD calibration will only be enabled when Traction Control and Electronic Stability
Control (ESC) is disabled. When traction control and ESC is enabled, there is no change to the
production calibration in any mode (Tour, Sport or Track). To disable traction control and turn
ESC off, hold down the Traction Control button for 5 seconds. The traction control and ESC
telltale lights will illuminate in the dashboard.
Installation
Note: This upgraded eLSD calibration is a customer pay transaction and should not be submitted as a
warranty claim. The only submission to General Motors is for 0.3 hr Labor.
1. Drive the vehicle to your dealer and have the calibration updated to the applicable calibration listed in
Calibration Reference Table below.
Calibration Reference Table
Model Year Calibration Part Number
2017-2018 84506758
2019-2021 84506759
2. Clear any DTC that set during the flashing.
©

[Dads1le]

That is great news!! Can’t wait to have that done and see if I can feel a discernible difference seat of the pants

[bishir]

Just talked to the GM guys at the SCCA match last weekend. My guess is we’ll see even more updates..

[Timbo-1LE]

Bishir, like what ? Details?

[JRL1LE]

I heard it really helps with modified suspension like CAM-C car at nationals, not as much with stock 1LE.

[Mountain]

Awesome! Thanks GM and Team Camaro!

[Try2paz]

Does this apply to the lz1 1le also?

[Chris V]

Originally Posted by JRL1LE

I heard it really helps with modified suspension like CAM-C car at nationals, not as much with stock 1LE.

It should make a difference if you’re running a stock car with stickier tires too.

I have modified suspension.

Originally Posted by Try2paz

Does this apply to the lz1 1le also?

Unfortunately, no. Given that the ZL1 1LE already has a different calibration, it wouldn’t be an improvement. Your car comes on 100 tw tires and has the stiffer suspension already.

[Badgerbimmer]

How about regular ZL1 which is basically (other than most of the bits from the ZL1 1LE spec handling kit) same as the SS 1LE?

[Ryephile]

Originally Posted by Chris V

... Given that the ZL1 1LE already has a different calibration,...

First I've heard about that. Source? In the 2018 Performance Supplement, it only mentions the difference between ZL1 and SS 1LE due to the powertrain difference.

Originally Posted by 2018 Performance Supplement

The ZL1 coupe and SS 1LE are calibrated uniquely and optimized for their unique powertrain and chassis combinations.

[MatthewAMEL]

Originally Posted by Ryephile

First I've heard about that. Source? In the 2018 Performance Supplement, it only mentions the difference between ZL1 and SS 1LE due to the powertrain difference.

A GMPP Engineer was commenting on this over on the 1LE Facebook group.


He stated this calibration was tested with the CAM-C configured 1LE. That car had the ZL1 1LE suspension setup.

[Ryephile]

Originally Posted by MatthewAMEL

A GMPP Engineer was commenting on this over on the 1LE Facebook group.


He stated this calibration was tested with the CAM-C configured 1LE. That car had the ZL1 1LE suspension setup.

Ok, but that doesn't address ChrisV's assertion...unless ChrisV meant to say this SS 1LE reflash is simply the ZL1 1LE eLSD calibration.

[Chris V]

Originally Posted by Ryephile

First I've heard about that. Source? In the 2018 Performance Supplement, it only mentions the difference between ZL1 and SS 1LE due to the powertrain difference.

GM calibrates the cars based on the stock tires and suspension. You will get the best abs/tc/eLSD Cal on the stickiest tires and highest suspension packages. This happens even within models where you can choose all-season or summer only tires. It’s why SS guys complain about ice mode but 1LE guys don’t.

The ZL1 1LE comes on the stickiest rubber and stiffest suspension of any Camaro.

Moral of the story, always buy the car with the stickiest stock tires.

Source: multiple conversations with the engineers that develop the calibrations.

[MatthewAMEL]

Originally Posted by Ryephile

Ok, but that doesn't address ChrisV's assertion...unless ChrisV meant to say this SS 1LE reflash is simply the ZL1 1LE eLSD calibration.

No, it's certainly different than the ZL1 1LE PTM programming.


Last years CAM-C car was a rolling testbed for GMPP. This calibration will help everyone with a PTM, but it was calibrated using the 1LE with the GMPP DSSV kit.


Even in 'all off' the PTM pulls power in certain conditions at AutoX. This calibration apparently goes a long way toward fixing that.