GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hello and thank you for your question,Since you are setting the lean codes , have you installed a fuel pressure gauge and monitored the fuel pressure while the problem is occurring?
Yes, all you need to do is install a fuel pressure gauge to the fuel rail service port and monitor the fuel pressure while the engine is bogging. Normal fuel pressure should be right at 55 to 60 PSI. Lets start with checking it first . Post back with the results and we can work from there.
It sure dose sound like it could be a fuel pressure issue, running the fuel pressure test would at least rule it out.
No problem, Im here everyday, post back when your ready and we can work from there.
Talk to you then.