Board index (Legacy) Predator Technical Discussion Predator GM Gas Unable to read to vehicle error

Unable to read to vehicle error

Predator support for GM gas vehicles

Moderators: mikel, 06MonteSS

Post Sat Jan 20, 2018 5:19 pm

Posts: 4
Heyo I just picked up an unlocked, used Predator for my 05 5.3 Silverado. Truck has no mods previously. Getting the unable to read vehicle error, scanner is u1973 on 9r11. My OBD2 reader works fine, I can’t even get a VIN on the predator. Any ideas or should I be returning the tuner to the eBay seller?

Thanks!

Post Sun Jan 21, 2018 1:09 pm

Posts: 17191
Location: CT

Anything aftermarket installed in the vehicle? i.e did not come from the factory?

You need to make sure anything aftermarket is disconnected/pull the fuse for - anything like aftermarket stereo, subs, amps, nav, alarm, remote start, seat heaters, trailer brake/light setup, etc.. anything like that, their wiring harnesses need to be disconnected/pull the fuses for it before you try to tune anything...

also make sure everything is turned off inside the truck.. lights, radio, heat/fan/blower, do not operate power windows, put your parking brake on, 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 Sun Jan 21, 2018 5:05 pm

Posts: 4
Only thing added on is a box to convert the XM radio to an aux in which I disconnected at the fuse box.

The step I did was

Get in the truck close door parking brake on
Ignition on
Auto lights off
Plug in tuner

I still get unable to read vehicle type (1)

Post Sun Jan 21, 2018 5:09 pm

Posts: 17191
Location: CT

make sure the truck's battery is good.. has a good full charge.. a low voltage issue can cause issues like that...
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 Sun Jan 21, 2018 6:45 pm

Posts: 4
Battery is pretty new, we had two weeks of below 10F and the truck never had issues starting. But I’ll check the voltage.

Post Mon Jan 22, 2018 10:41 am

Posts: 53179
Location: DiabloSport World Headquarters

doesnt seem like voltage honestly. Got any other similar GM vehicles you can try it on?
Sounds like a communication issue, likely with the device itself.
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 Mon Jan 22, 2018 1:29 pm

Posts: 4
yea, I can try it on a buddy's truck and see if it communicates. If not, it goes back to the eBay seller. thanks guys!


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