Question

What is P0442 on a 1998 GMC Jimmy?

Answer 1

This code is for a small leak in the evap system. Because the leak can be so small, the best thing to do is to have the truck smoke tested to locate the leak, then perform the repair. The hole in the system is .5mm or smaller.

Answer 2

P0442 GMC - Evaporative Emission Control System Leak Detected Small Leak

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