Having problems with your 1999 GMC Sierra ?

P1860 and P0740 error codes during emmision inspection. Truck runs and starts fine. Had an ignition interlock device installed. Could that be it?

Posted / edited by AnonymousUser on : 15-07-2019

Answers :

The o2 sensor needs replacing and catalytic converter
Repair Help & Product Troubleshooting for 1999 GMC Sierra

Tips for a great answer:

- Provide details, support with references or personal experience .
- If you need clarification, ask it in the comment box .
- It's 100% free, no registration required.

Suggested Questions/Answers :

Loading ...

  • Start your question with What, Why, How, When, etc. and end with a "?"
  • Be clear and specific
  • Use proper spelling and grammar
all rights reserved to the respective owners || carrestorationshop.com || Terms of Use || Contact || Privacy Policy
Load time: 0.0086 seconds