2003-2007 Chevy Tahoe 5.3L LM7 Smog Check
QUICK ANSWER
2003-2007 Chevy Tahoe 5.3L LM7 owners: known smog-related issues. 5.3L LM7 catalytic converter degradation common at 150k+. Spark plug wear contributes to converter failure.
What you should know
5.3L LM7 catalytic converter degradation common at 150k+. Spark plug wear contributes to converter failure.
Common questions
Are 2003-2007 Chevy Tahoe 5.3L LM7 vehicles having smog issues?
5.3L LM7 catalytic converter degradation common at 150k+. Spark plug wear contributes to converter failure.
What should I do before smog testing?
Address active codes, drive 100+ miles to complete readiness, consider pre-test diagnostic at our test+repair locations.
CAP repair assistance available?
Yes if income-qualified — up to $1,200 toward smog repair via bar.ca.gov/online_services/cap.