GMC Troubleshooting Questions? Ask a Mechanic for Answers
I'll try to help you out with this. Which engine is in your truck?
Ok, your harmonic balancer has no threaded holes, but has 3 rather large openings, correct?
ON the back side of those 3 openings, there are flat spots. You will need a 3 jaw puller to remove that balancer. I will find you a couple pictures showing how it's done. they do make a special harmonic balancer puller just for that style of harmonic balancer, but a 3 jaw gear puller will also do the job fine. Just as long as you fit it inside those openings, and don't grab it around the outer edge.. I will find you some pictures..
here is a picture of the actual puller that is made for this. I will also find you a picture of it being done with a standard gear puller.
Please let me know if this helps
Just wondering if you got that taken care of?