GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hello, I'm Chris. Thanks for seeking us for help.
The best timing drive components are going to be OEM. You need to find out why the chain is failing. Normally its from slack and flopping from oil pressure to the tensioner to low, either from a failing pump or oil passage way restrictions reducing the pressure and flow. I would for sure replace the pump and use chemicals to clean out the oil ports.
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