Harmonic balancer issue
Thread Starter
Navigator
Joined: Oct 2025
Posts: 9
Likes: 0
Harmonic balancer issue
Hi,
I have a 2002 and just had harmonic balancer replaced. Upon leaving the garage the check engine light came on and the turn signals weren’t working. They were working before this and check engine light wasn’t on. I called the garage to come pick it up which they did. I know it has to be something they did while working on HB. Any ideas what could have happened?
Thanks in advance
I have a 2002 and just had harmonic balancer replaced. Upon leaving the garage the check engine light came on and the turn signals weren’t working. They were working before this and check engine light wasn’t on. I called the garage to come pick it up which they did. I know it has to be something they did while working on HB. Any ideas what could have happened?
Thanks in advance
Tech Contributor
Joined: Jan 2007
Posts: 19,361
Likes: 1,128
From: Dyer, IN
Hi,
I have a 2002 and just had harmonic balancer replaced. Upon leaving the garage the check engine light came on and the turn signals weren’t working. They were working before this and check engine light wasn’t on. I called the garage to come pick it up which they did. I know it has to be something they did while working on HB. Any ideas what could have happened?
Thanks in advance
I have a 2002 and just had harmonic balancer replaced. Upon leaving the garage the check engine light came on and the turn signals weren’t working. They were working before this and check engine light wasn’t on. I called the garage to come pick it up which they did. I know it has to be something they did while working on HB. Any ideas what could have happened?
Thanks in advance
Race Director
Joined: Oct 2004
Posts: 12,859
Likes: 4,658
The C5 front turn signal issue has thousands of posts. I agree with MM. It's my understanding that after the signal housings were given the green light for manufacturing, someone at GM changed the bulb setup to a much hotter bulb. Heat is the enemy of the stock system. I fought this for years. Eventually, the only thing that worked for me was going to LEDs and an aftermarket flasher.....
Cruising
Joined: Nov 2025
Posts: 11
Likes: 9
The C5 front turn signal issue has thousands of posts. I agree with MM. It's my understanding that after the signal housings were given the green light for manufacturing, someone at GM changed the bulb setup to a much hotter bulb. Heat is the enemy of the stock system. I fought this for years. Eventually, the only thing that worked for me was going to LEDs and an aftermarket flasher.....
