An H3 can only read 4 sensors and it does NOT recognize position...... end of story. So the only TPMS that need to be programmed are the 4 on the ground.

Example: if you program sensor 1, 2, 3, 4 and then 5, #1 gets bumped out of the monitoring loop. Assume 1-4 are the tires on the ground. #5 is not sending a signal since it (spare) is not rotating. = TPMS warning light.

 

Doc Olds, The 4 in tires were programed when installed. One of the new one's was bad. So the tire dealer put in a new one and gave me a spare. The spare was programed and never installed in a tire., Just put in in console. So I have 4 on the ground, nothing in the spare tire. The odd one in console. Just to keep from getting lost. I did remove it from console and left in house when I had key fob installed. And still have the light on. And that's why I give up.

 

Replace those crappy azzed tpms sensors!

 

What brand do I need ? That's going to turn off my light?

 

You NEED 315Mhz TPMS SENSOR for CHEVY COLORADO GMC CANYON HUMMER H3 H3T OEM Spec

 

Sensors transmit when the VEHICLE is moving, doesn't matter where they are!
TPMS PIPE BOMB:

 

Thanks for the link to sensors. So I have 5 crappy sensors. 4 in the tires. 1 in console. However, I keep hearing I have a computer problem. I'm going to order the TPMS sensors. Taken a break on this for a little while. Polished H3 today. It really is a nice vehicle...

 

Many go quick to the module. 99% of the time it's not the module.

 

If it's not the ECM then what ? I do not have the expertise or the equipment to look at it. So the light stays on. It will take about $100.00 plus the TPMS price to get the new ones installed. Like I said before, Dealer wants $300.00 to start. Not going there ever. What to do?

 

I would go back to the shop you had install the sensors and tell them to replace the sensors or demand a refund. In the meantime scan and post the codes.