2003 Sierra 1500 Electrical Issues

[gmcgarry]

Hello,

 

I have a 2003 GMC Sierra 1500. For Christmas my wife bought me a remote starter for my truck. It was a pretty simple installation after I deciphered the instructions. In summary, the remote starter module hooks up to a bypass module and the bypass module talks to the truck through the OBD2 port to make all the functions work. The only interface points to the vehicle are the brake switch, the OBD2 connector, and a harness that plugs into the tumbler the is turned by the key. So there isn't any wire hacking going on here. So I get it all hooked up and it's working great. Now it's time to neatly tuck everything away and put all the plastic trim back on. While doing this I realize the harness that plugs into the tumbler is going to get in the way of the bezel that goes around the ignition. Under the steering column is this sort of large metal plate that is held in place by 4 10mm nuts. It's obvious that if I remove the plate and tuck the harness under the steering column and replace the plate that everything will fit quite nicely under the dash.

 

How wrong I was.....

 

After replacing the plate the truck will no longer start. It cranks. The instrument cluster lights up. It catches but does not stay running. Power door locks, dome light, power windows, and probably other stuff also do not work. The power mirrors do work. I completely removed all the remote starter related components and plugged the original plug back into the tumbler but still all the same problems.

 

Can anybody help me diagnose this? I checked all the fuses that seemed relevent to any of the failing systems. At this point I'm in over my head, and I have a dead truck. I have no idea what to do.

 

Happy New Year and many thanks in advance for any replies.

[Nytemare]

You have to do a Passlock II relearn. The truck thinks you have stolen it.

[gmcgarry]

You have to do a Passlock II relearn. The truck thinks you have stolen it.

 

Thanks for the reply. I searched and found these instructions for resetting the passlock. It did not work. Are these correct? After performing steps 1 and 2 the security light does not flash. It is not even lit up.

 

 

 

1. Turn ON the igniton, with the engine OFF.

 

2. Attempt to start the engine, then release the key to ON (vehicle will not start).

 

3. Observe the SECURITY telltale, it will be flashing. After approximately 10 minutes the telltale will turn OFF.

 

4. Turn OFF the ignition, and wait 5 seconds.

 

5. Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes. The vehicle is now ready to relearn the PASSlock Sensor Data Code and/or passwords, on the next ignition switch transition from OFF to CRANK.

 

IMPORTANT: The vehicle learns the PASSlock Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You MUST turn the ignition OFF before attempting to start the vehicle.

 

6. Start the engine. The vehicle has now learned the PASSlock Sensor Data Code and/or password.

[Nytemare]

You have to do a Passlock II relearn. The truck thinks you have stolen it.

 

Thanks for the reply. I searched and found these instructions for resetting the passlock. It did not work. Are these correct? After performing steps 1 and 2 the security light does not flash. It is not even lit up.

 

 

 

1. Turn ON the igniton, with the engine OFF.

 

2. Attempt to start the engine, then release the key to ON (vehicle will not start).

 

3. Observe the SECURITY telltale, it will be flashing. After approximately 10 minutes the telltale will turn OFF.

 

4. Turn OFF the ignition, and wait 5 seconds.

 

5. Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes. The vehicle is now ready to relearn the PASSlock Sensor Data Code and/or passwords, on the next ignition switch transition from OFF to CRANK.

 

IMPORTANT: The vehicle learns the PASSlock Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You MUST turn the ignition OFF before attempting to start the vehicle.

 

6. Start the engine. The vehicle has now learned the PASSlock Sensor Data Code and/or password.

 

That should work...Try going over your connections again and see if you pulled something loose when putting all the covers back on. Try to start the truck with all the wires dangling and all the covers off.

[gmcgarry]

Thanks to everyone who replied. Turns out, coincidental or perhaps not, the bypass module I had installed with my aftermarket radio must have died. I remembered that when I installed the radio the dome light went out when I unplugged the factory radio. On a hunch I reinstalled the factory radio and the truck started right up and is running like a champ.

[matt76]

Thanks to everyone who replied. Turns out, coincidental or perhaps not, the bypass module I had installed with my aftermarket radio must have died. I remembered that when I installed the radio the dome light went out when I unplugged the factory radio. On a hunch I reinstalled the factory radio and the truck started right up and is running like a champ.

 

what is the bypass module? where is it? i think i'm having the same issue. i did remove and throw away two parts of the factory stereo. maybe that was a mistake.