One problem related to catalytic convertor has been reported for the 2001 GMC Sonoma. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 GMC Sonoma based on all problems reported for the 2001 Sonoma.
Check engine light came on. Dealer said air pump to catalytic converter failure. Approx $700. 00 to replace. Not covered by manufacturer.