One problem related to radiator hose has been reported for the 2000 GMC Sonoma. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2000 GMC Sonoma based on all problems reported for the 2000 Sonoma.
Oil return lines fail prematurely causing oil to leak at the crimp sites on the hoses. Ld return lines were replaced with new lines on 18 September 2004 with new lines general motors part numbers 15194578 and 15194579 purchased on 16 and 17 September 2004.