Cannot get into launch control
Thread Starter
3rd Gear
Joined: May 2022
Posts: 3
Likes: 2
Cannot get into launch control
Okay... To start, I've launched dozens of times in the past. It's a 2021 Z51 with magride. I've tried in track mode, sport mode, and Z mode. Yes, I am standing on the brake and flooring the accelerator. Yes, it is in PTM mode. I have changed the brakes numerous times for track, low dust without any issues in the past and it launched fine each time. I have zero codes when reading with my scan tool. Any ideas other than a trip to the dealership? (obviously a last resort) Thanks!
Melting Slicks
Joined: Nov 2012
Posts: 3,161
Likes: 686
From: SUFFIELD CONNECTICUT
Okay... To start, I've launched dozens of times in the past. It's a 2021 Z51 with magride. I've tried in track mode, sport mode, and Z mode. Yes, I am standing on the brake and flooring the accelerator. Yes, it is in PTM mode. I have changed the brakes numerous times for track, low dust without any issues in the past and it launched fine each time. I have zero codes when reading with my scan tool. Any ideas other than a trip to the dealership? (obviously a last resort) Thanks!
Burning Brakes
Joined: Jul 2024
Posts: 774
Likes: 467
Okay... To start, I've launched dozens of times in the past. It's a 2021 Z51 with magride. I've tried in track mode, sport mode, and Z mode. Yes, I am standing on the brake and flooring the accelerator. Yes, it is in PTM mode. I have changed the brakes numerous times for track, low dust without any issues in the past and it launched fine each time. I have zero codes when reading with my scan tool. Any ideas other than a trip to the dealership? (obviously a last resort) Thanks!
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
I always put it into TRACK mode 1st--
Then click on the TCC 2 times and Stabilitrack yellow light should come on NOW both of them are ON yellow
Hold the brake pedal HARD--Keep the steering wheel STR8 and Do NOT let the car creep forward
It should rev up just past 3000 RPM's Hold the pedal at WOT then pop off the brake pedal
Depending on how warm the tires are If really warm you may get one chirp the launch
If the tires are not fully warmed up you may get 2 chirps but still in the low 3 seconds
Then click on the TCC 2 times and Stabilitrack yellow light should come on NOW both of them are ON yellow
Hold the brake pedal HARD--Keep the steering wheel STR8 and Do NOT let the car creep forward
It should rev up just past 3000 RPM's Hold the pedal at WOT then pop off the brake pedal
Depending on how warm the tires are If really warm you may get one chirp the launch
If the tires are not fully warmed up you may get 2 chirps but still in the low 3 seconds
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 34,867
Likes: 12,299
From: NE South Carolina
Can see my Z-Mode PMT: Dry setting and the Traction Control OFF Symbols. Press Z-Mode Button Twice and with left foot very firmly on Brake and WOT it goes to ~3500 rpm. Then lift left foot and "Hold On!"
Note to get that low # on GM Dash Test (GM subtracts dragstrip roll out like car mags, my guess ~0.2 seconds) I had:
- Battery at 100% charge NOT normal 80% by driving for >10 minutes in Z-Mode Power set to Track,
- Tire tread (all 4) heated, I do that when I turn onto my safe test street, farm fields both sides, no traffic start accelerating from ~10 mph @ WOT to 95+, applied brakes at ~0.8 "g,"
- Then Launch Control. Note perfect weather, low humidity and <1/4 tank. My passenger Remi' only weights 11 lbs - Loves Speed.
Last edited by JerryU; Sep 26, 2024 at 11:10 AM.
