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2003 TRAILBLAZER 4.2L JERKING WHILE DRIVING HWY. SPEED WITH CODE P1860.
WHAT IS THE ROOT CAUSE OF THIS PROBLEM

Vehicle: 2003 CHEVROLET TRAILBLAZER 4.2L

1 Answer

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Hi there,

This code indicates an issue with the TCC PWM. Here is a list of possible causes.

P1860 CHEVROLET - TCC PWM Solenoid Circuit Electrical

Read more: https://www.autocodes.com/p1860_chevrolet.html

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