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Professional Automotive Repair Technical Discussions for December 18, 2024 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 2008 GMC Savana 3500 4.8L Misfire VIN: 1GTHG35C98 Vehicle came in with check engine light on, DTC: P0300, replaced spark plugs. Data stream shows cylinder #4 regularly intermittently misfiring at idle. (NO P0304 though)No misfires while driving at cruise. Engine runs smooth even at idle; misfire only dete... Trouble codes: P0300 (engine misfire detected) |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 2008 Chevrolet Silverado 1500 WT 4.3L Misfire VIN: 1GCEC14X78 This vehicle has not returned yet. I will update if/when it does. The only information I can add is the does not have a distributor. We did drive it with a vacuum gauge on it and usually you can see a fluctuation when it misses. Revealed nothing. I'm about to ... Trouble codes: P0306 (Misfire [...]). |
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| 2013 Chevrolet Cruze Eco 1.4L Cuts out VIN: 1G1PJ5SBXD Turns out that the main power supply cable from the maxi fuse at the battery to the under-hood fuse beck was the problem, The cable had been arcing and created high resistance . I cleaned the connections and securely bolted the cable to the fuse beck and now ... Trouble codes: P0420 (Catalyst System Low Efficiency Bank 1). |
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