GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hi Im David, thanks for visiting the site. Is the check engine light on?
do you have a code reader?
whats the code
p0171 or p0174?
ok, well let me know
check engine light is still on?
not worried about the i/m readiness. what scan tool are you using?
does it read live data?
can you check the fuel trims for me?
ok, let me know
that not a code thats a protocol
you need to read the book a bit more, those are not codes.
just checking in to see how its going
you ever figure out your scan tool?