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Professional Automotive Repair Technical Discussions for March 13, 2018 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 2002 Chevrolet Impala 3.4L Engine VIN: 2G1WF52E32 This vehicle was brought us original having lean codes and a p0303 misfire cylinder 3. We immediately found broken vacuum lines and repaired them. We still had lean fuel trims so we smoke tested the intake. We found a leak at the egr mounting gasket and replac... |
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| 2012 Chevrolet Sonic LS 1.8L Cuts out VIN: 1G1JC5SH8C I have a sonic that after it gets warm the engine has a little cut out at idle about every 6 seconds.it does not do it cold.it feels like a quik misfire. when it cuts out you can hear a hiss in the throttle body right before.on the scanner the timing also chan... |
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| 2012 GMC Sierra 1500 SLE 5.3L ecm VIN: 3GTP2VE77C hello iatn need some info on vehicle speed. problem is ecm is 10 to 20 mph off actual speed. tcm and abs are correct on speed so how does ecm determine speed and has anyone ran in to this before. thank you |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 2009 Buick Enclave CXL 3.6L MIL Lamp on VIN: 5GAER23D29 Thanks to all that replied. I really appreciate everyone who gave their time to help me! Thank you Doug, for the info on the cam rpm data. I needed to hear someone else had run into that glitch so I could ignore it...It was gnawing at me, even though several ... Trouble codes: P0017, P0134. |
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| 2006 Chevrolet Trailblazer LT 4.2L aborts evap test VIN: 1GNDT13S76 Finally got test to run to completion...Thanks to all who gave ideas. In the end it was a combination of a very small leak and an erratic pressure sensor. With the cap off the sensor would erratically go from 1.4 to 1.6 volts. While I had the tank down making ... Trouble codes: P0171. |
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| 2011 Chevrolet Malibu LTZ 2.4L No Start, Stall VIN: 1G1ZE5E18B unplugged intake cam sensor and car started and ran, plugged it back in and it started and died again.. replaced both cam sensors and car is fine now.. I knew this was not a theft issue from the beginning due to there being no theft codes and no theft light, a... |
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| 2004 GMC Envoy XL SLE 4.2L Hesitation VIN: 1GKET16S74 Hi guys we found the problem with the Envoy. The cat had melted down and restricted the exhaust. It was weird because it didn't have that normal, pressure in the exhaust sound if anything it sounded like the engine was trying to suck air in like if it had a co... |
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