Close
GMC
Sonoma
24

Check Engine Light Due to Gas Cap Issue on GMC Sonoma

Problem Description and Possible Solution

A Loose or worn gas cap may cause Check Engine Light to illuminate.

Problem Data
RepairPal Verified
Average mileage: 92,958 (21,965–209,430)
9 model years affected: 1996, 1997, 1998, 1999, more2000, 2001, 2002, 2003, 2004
24 people reported this problem
Comments
Viewing 1 - 8 of 8 comments
Service engine light keep coming on. We finally just replaced the the gas cap and it took care of the problem!
04/2010 Freeway road was uneven at end of bridge. I hit dip going 60 mph. Truck bottomed out and I nearly lost control. Check engine light came on. I spent $100 to have problem diagnosed as broken fuel cap.

03/14/12 Happened again. 13 reported problems? I think the dealer should refund me the $200 I spent to diagnose this problem.
after filling up and twisting cap till it clicks 3 times ODB code reads 0442 it does not always happen though!
replaced gas cap 2 times this year.. not sure if its a gmc problem or the kind of gas we all have to deal with now.. I hear its not good and dry rots the gas caps