Wife came home in h2 hummer 2003 parked,30 mins.,went to make store run and hummer turns over but does not crank;.has fuel! i checked pcm b module fuse,fuel pump relay (f/pmp) . I put an OBD to check computer read out but it did not register or come on. put OBD on my s/10 truck and it registered. is it my hummer computer! let me know what else i need to check before i call dealership. Stacy ...... P.S. i listened for fuel pump running and i cannot hear it; is there any other safety device in between!

Hello Stacy, My name is Mike. I am thrilled that you choose me to help you with your problem. I am sorry, it took me a few hours to get back to you. I have been helping other customers. Here is where I am with this on your cranking and not starting issue. Oh, by the way great job on your part eliminating some of the other potential suspects.

First of all, I try and tackle the easiest things first,to see if we get lucky.

Pull the start/run relay out for a couple minutes, then put it back in and reset it might reset the passlock box and start right up.

Now, why did I say that? I believe your problem is with your Passlock indicator.( which has to do with your anti theft system)The way I just described is a 50/50 chance to have it work, but don't worry. I always have a plan B and C.

Here is some questions to your symptoms: Stay with me now, wait for it.

Perform the re-learning procedure

Turn ON the ignition, with the engine OFF.

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

Observe the SECURITY light, after approximately 11 minutes the light will turn OFF.

Turn OFF the ignition, and wait 10 seconds.

Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes ( the vehicle

is now ready to relearn the Sensor Data Code and/or passwords on the next ignition switch transition from OFF

to CRANK).

Important: The vehicle learns the relearns 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.

Start the engine (the vehicle has now learned the Sensor Data Code and/or password).

Here is Plan C as promised, but I personally would not suggest, Even though GMC offers a bypass procedure.

Link for a Bypass Solution:

http://newrockies.com/installation-instructions/hummer/h2/2003-hummer-h2/

Plan D, would be have to check into possibility of bad ECM, but lets hope that is just a worst case scenario.

Thanks So Much,Mike. Please Keep Me Informed of progress.