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2015.5 GMC 2500 Duramax Not Being User Friendly
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<blockquote data-quote="CHASMAN9" data-source="post: 692281" data-attributes="member: 307"><p>What I have found and had issued with on my Duramax's.</p><p></p><p>Black Smoke</p><p>****Diagnosing smoke related issues on trucks equipped with diesel particulate filters may require temporarily disconnecting the filter or installing a test pipe to see the smoke. Excessive smoke from the tailpipe with a DPF installed usually means the DPF is damaged and may need replaced.</p><p></p><p>If at idle, use the scan tool to cut out one cylinder at a time and see if the smoke disappears.</p><p>Dirty air filter</p><p>Exhaust leaks or Boost leaks, you can usually hear a boost leak as a high pitched squeal or unusual rushing or whooshing air sound under load.</p><p>Inspect the mass air flow (MAF) sensor for obstruction, contamination, and damage.</p><p>Inspect for the EGR valve sticking open. Command the valve to 20%. Desired and actual position should not be more than 3% different.</p><p></p><p></p><p></p><p></p><p>ADMINISTRATOR</p></blockquote><p></p>
[QUOTE="CHASMAN9, post: 692281, member: 307"] What I have found and had issued with on my Duramax's. Black Smoke ****Diagnosing smoke related issues on trucks equipped with diesel particulate filters may require temporarily disconnecting the filter or installing a test pipe to see the smoke. Excessive smoke from the tailpipe with a DPF installed usually means the DPF is damaged and may need replaced. If at idle, use the scan tool to cut out one cylinder at a time and see if the smoke disappears. Dirty air filter Exhaust leaks or Boost leaks, you can usually hear a boost leak as a high pitched squeal or unusual rushing or whooshing air sound under load. Inspect the mass air flow (MAF) sensor for obstruction, contamination, and damage. Inspect for the EGR valve sticking open. Command the valve to 20%. Desired and actual position should not be more than 3% different. ADMINISTRATOR [/QUOTE]
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