GMC Troubleshooting Questions? Ask a Mechanic for Answers
Welcome, I'm Chris (aka Moose), my normal schedule online is around lunch and after dinner till early morning.
Does this occur when applying throttle or when not applying throttle?
Does it run bad prior to stalling?
Once stalled does it restart easily?
When it will not restart that is when diagnostics need to be ran. Those first few steps include monitoring the fuel pressure and injector pump actual and desired pressure. Also make sure all modules can communicate with the scan tool during this downtime. Can you try that?
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Thanks for using Just Answer, Chris
Hello again Chris here,