fastgmc53

iTrader: (33)

I know these issues are all over this forum so I hope somebody can help me out..... I have an 04 gmc 2wd I just put 4.11's abd truetrac in it and since I fired it up I have had the service brake system issue. I have hp tuners and have since tuned it and speedo is dead on per gps. I bled the rear brakes to day and still gettin codes.. says wheel speed mismatch, and that both front wheel sensors are missing....... but when I clear the codes even with the truck ignition on nut running they pop right back up before the truck even starts..... also If I unplug one of the sensors is shows that that sensor has an open circuit so it is communicating with it. I cant disable the codes with HP tuners already looked. abs module doesn't do anything just feels like my brakes are gone when I stop. just hoping somebody else has fixed this since I can read the codes and all.....

JoeyGC5

iTrader: (24)

Do you have power to the sensors? You can get false feedback from the pcm input supplying a source and not having an actual supply voltage on the sensor.

fastgmc53

iTrader: (33)

I havent checked that.... the truck was fine then I pulled the rear out geared it and put it back in and have had te problem since......

fastgmc53

iTrader: (33)

ideas??

fastgmc53

iTrader: (33)

come on guys I really need to figure this out it's driving me crazy

fastgmc53

iTrader: (33)

bled all 4 corners... no air in it. can hp tuners not clear brake codes???? I try over and over to clear codes with just the ignition on and they still pop right back up before I even start the truck..... keep gettin

Brake] C0238 - Wheel Speed Mismatch (History)
[Brake] C0291 - (History)
[Brake] C0226 - LF Wheel Speed Signal Missing (History)
[Brake] C0222 - RF Wheel Speed Signal Missing (History)
[Restraints] U1000 - Class 2 Communication Malfunction (History) (Immature)
[Restraints] U1096 - Loss of Communications with IPC (History) (Immature)
[HUD] U1000 - Class 2 Communication Malfunction (History) (Immature)
[HVAC] B0418 - (History) (Immature)
[HVAC] B0263 - (History) (Immature)

the HUD one just started today....wtf I dont even have it!!

Hvac started yesterday but no issues!!! this is really pissin me off

fastgmc53

iTrader: (33)

could it be that since hp tuners will only reset the drivetrain codes that I will have to have the stealership reset my brake codes.... I did drive the truck before I tuned it for the gears

budhayes3

iTrader: (19)

Try disconnecting the battery for a few minutes to see if the codes clear...pretty sure that HPTuners and EFILive will only do engine codes, but I'm not 100% sure.

fastgmc53

iTrader: (33)

ides guys??? still having probs...... I have read about air in the abs module??? no abs light just the parking brake light and if i push it then it flashes 3 times and stays on again

fastgmc53

iTrader: (33)

bump..