Having problems with your 1998 GMC Sierra ?

My code reader says PO308. Put on new spark plug, wire, cap, coil, coil module. code still come up. Truck has 175000 miles on it

Posted / edited by AnonymousUser on : 23-07-2018

Answers :

It is most likely the fuel injector,replace it and you will be on your way.
Repair Help & Product Troubleshooting for 1998 GMC Sierra

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