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Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 16873
Experience:  15 years GM master tech
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I have a 2002 trailblazer reading codes P1022, p1120 and

Customer Question

Hi, I have a 2002 trailblazer reading codes P1022, p1120 and p11220
JA: Sometimes things that you think will be really complicated end up being easy to fix with a Chevy. The Chevy Mechanic I'm going to connect you with knows all the tricks and shortcuts. Tell me a bit more about what's going on so he can help you best.
Customer: Currently the truck will not start
JA: Are you hoping to fix this yourself?
Customer: I am
JA: Great! What have you tried so far?
Customer: checking the voltage on the lines and making sure that the connections are solid. I am just looking to see if there was anything else that I can do before I replace the complete throttle body
JA: Is there anything else the Chevy Mechanic should be aware of about your Chevy?
Customer: that is it
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Chevy Mechanic about your situation and then connect you two.
Submitted: 1 year ago.
Category: Chevy
Expert:  Gary replied 1 year ago.

do you have a multi meter on hand ?

Expert:  Gary replied 1 year ago.

with the key ON unplug the throttle connect at the throttle body

see if the light blue /black and grey for 5 volts and see if the black/white and the black are good grounds

if so then the connector is bad or the throttle body is bad

Expert:  Gary replied 1 year ago.

how are you making out ?

if you have any questions please ask as i do not get credit for my work until you rate us here at Justanswer!