Hobert
Full Access Member
I have a 2019 suburban 5.3 engine that is E85 capable but they dropped the support and left off the e85 measuring system in productions. Others have added the capability back in. I looked at adding it back to mine, the link below will provide a full education.
https://www.tahoeyukonforum.com/threads/l86-l83-flex-fuel-conversion-with-pics-and-part-s.128003/
https://www.tahoeyukonforum.com/threads/l86-l83-flex-fuel-conversion-with-pics-and-part-s.128003/