Board index (Legacy) Predator Technical Discussion Predator GM Gas ABS light after gear swap

ABS light after gear swap

Predator support for GM gas vehicles

Moderators: mikel, 06MonteSS

Post Tue Feb 24, 2015 3:04 pm

Posts: 2
I have a 2008 GMC Sierra with the 5.3 engine and 33 inch tall tires running the Diablo tune.

I just put 4.10 gears in my truck and started getting the ABS light.

Using my Diablo Predator u1794 running release 9r31, I cleared the code and modified the tune to account for the 4.10 gears. After about 5 minutes of driving with the modified tune the ABS light came back on. I used to see all kinds of posts about the Predator not changing gear ratio. I have that option in my Predator. However, it does not appear to be taking effect. Do I need a custom tune to fix this issue?

Post Tue Feb 24, 2015 3:11 pm

Posts: 17610
Location: CT

lower the tire size...

2007 and 2008 abs modules have a limit on how big the tire size setting can be..

now since you changed the gear ratio, the setting is probably too big..

so lower the tire size by a half inch, and see if that solves it..

if not, lower it by another half inch, etc etc..
06MonteSS / DiabLew Tune
Image
2014 Camaro SS - 2SS, RS pkg., short-throw shifter, NPP perf. exhaust, BMR strut-tower brace, Cold Air Inductions cold air intake
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com -- www.diablocustomtuning.net

Post Wed Feb 25, 2015 4:12 pm

Posts: 2
That appears to have worked. No ABS light on the drive to work this morning. FYI, for anyone running this setup (33 inch tall tires and 4.10 gears) I set the tuner to a 4.10 gear ratio and 25 inch tall tires. I verified with GPS on the way to work and my spedo is about 1 MPH fast at 40 MPH. IE, my spedo shows 41 and my GPS is showing 40. Close enough for me.

Post Wed Feb 25, 2015 6:29 pm

Posts: 17610
Location: CT

cool deal..

yeah, within 1-3 mph is acceptable...

hell, I checked my wife's totally factory stock CTS once with my phone gps, and her speedo was showing about 2-2.5 mph off compared to gps, heh...
06MonteSS / DiabLew Tune
Image
2014 Camaro SS - 2SS, RS pkg., short-throw shifter, NPP perf. exhaust, BMR strut-tower brace, Cold Air Inductions cold air intake
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com -- www.diablocustomtuning.net

Post Wed Feb 25, 2015 6:40 pm

Posts: 55385
Location: DiabloSport World Headquarters

06MonteSS wrote:
cool deal..

yeah, within 1-3 mph is acceptable...

hell, I checked my wife's totally factory stock CTS once with my phone gps, and her speedo was showing about 2-2.5 mph off compared to gps, heh...

....again, I say user error :)

rofl...
Mike Litsch
Powerteq Customer Service Manager
Diablo Tech support by phone:
561-908-0040x4
M-F 8:00 AM to 5:00 PM EST

Post Thu Feb 26, 2015 12:16 pm

Posts: 17610
Location: CT

mikel wrote:
06MonteSS wrote:
cool deal..

yeah, within 1-3 mph is acceptable...

hell, I checked my wife's totally factory stock CTS once with my phone gps, and her speedo was showing about 2-2.5 mph off compared to gps, heh...

....again, I say user error :)

rofl...


LOL.. douchenozzle!
Facebook_f_u.png
Facebook_f_u.png (8.66 KiB) Viewed 2465 times
06MonteSS / DiabLew Tune
Image
2014 Camaro SS - 2SS, RS pkg., short-throw shifter, NPP perf. exhaust, BMR strut-tower brace, Cold Air Inductions cold air intake
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com -- www.diablocustomtuning.net


Return to Predator GM Gas