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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), GMC Mechanic
Category: GM
Satisfied Customers: 5787
Experience:  GM Grand Master Technician 2007. 14 years experience.
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GM Colorado: I need help i am master tech diagnostic I have

Customer Question

I need help i am master tech diagnostic I have colorado 2008 3.9 engine the truck is not starting and i have code b1443 and b1373 and u1000 in the BCM i have no other code in pcm I did all the test whith the ignition and th resistance i did and the check at the bcm for 12volts and ground

i have programme to check the bus can and it say bus can open 3 and 11

Submitted: 1 year ago.
Category: GM
Expert:  Roy Belding replied 1 year ago.
good afternoon my name is ***** ***** I will assist first, make sure you have voltage to the ignition switch. both these codes are based around low or open voltage from the ignition switch. have you checked or replaced the ignition switch??? Roy
Customer: replied 1 year ago.

I did all the test to ignition and evry thing is good this switch is not working whith voltage

Expert:  Roy Belding replied 1 year ago.
if it is not working, then change the switch Roy
Customer: replied 1 year ago.
The switch is good i did all the test on Si GM told me to doSometime the truck start and engine stop after
Expert:  Roy Belding replied 1 year ago.
what test did you do???is the fuel pump working?? Roy
Customer: replied 1 year ago.
I have u1000 code the can bus 3 ,7 can bus
i did the resistance test on ignition switch
SI and on scan tool
please pass if you dont know I am Master Tech to just need idee from another GM tech
Please dont waste my time i need GM tech
Expert:  Roy Belding replied 1 year ago.
??? did you do the other tests
Customer: replied 1 year ago.
Relist: Inaccurate answer.
Expert:  Roy Belding replied 1 year ago.
in order to help, I need answers to my questions. I will opt out for you and let someone else help. I have tens of years expierence on gm and know them inside out. just please answer the questions the tech ask you so you can get to a resolution have a good night
Customer: replied 1 year ago.

to long respond