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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15181
Experience:  GM Grand Master Technician 2007. 14 years experience.
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I just replaced the motor in my 2005 trailblazer, it is

Customer Question

I just replaced the motor in my 2005 trailblazer, it is pulling the P1512 code, we changed out the throttle body, but still no change, it is staying in limp mode, please help!!!
Submitted: 1 year ago.
Category: Chevy
Expert:  Reggie Whiddon replied 1 year ago.

Try this first remove both battery cables rub them together then clamp them while they are clamped cycle your key through all positions and back to off. Then hook up cables positive first. Then crank vehicle

Customer: replied 1 year ago.
STILL NOTHING
Expert:  Reggie Whiddon replied 1 year ago.

Okay hold on and allow me to research this

Expert:  Reggie Whiddon replied 1 year ago.

Okay you ju st replaced the engine, if I were there I would go to each ground wire and loosen check and retighten. Next I would check for proper terminal tension, and check the harness. If you have a scantool monitor app and tps readings, wiggle harness while monitoring look for change

Expert:  Reggie Whiddon replied 1 year ago.

You dome the reboot with no change that tells me we have a hard fault my money is on a loose ground or terminal spread open

Customer: replied 1 year ago.
OK, WE HAVE REDONE ALL GROUNDS AND CLEANED THROTTLE BODY, NOW WE ARE ONLY GETTING ENGINE CODE P1515
Expert:  Reggie Whiddon replied 1 year ago.

Okay good job hold on let me research this code

Expert:  Reggie Whiddon replied 1 year ago.

Okay I want you to take a voltmeter and check the voltage on every fuse with truck running. We've had alot of switch fail and give low voltage make sure you have voltage on both sides of fuse and it is battery voltage

Customer: replied 1 year ago.
TY
Expert:  Reggie Whiddon replied 1 year ago.

No sir thank you let me know as soon as you make those checks