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Professional Automotive Repair Technical Discussions for December 26, 2012 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1994 Chevrolet K2500 7.4L Poor Idle Quality, Cuts out, Stall VIN: 1GCGK29N7R This is a new purchase for a good custumer and and he wanted it tune up hopeing to fix problem, the vehical will intermitaintly stall at idle or when comeing to a stop I found one code 42 mabe due to tune up checked timing, Checked all my baces found nothing o... Trouble codes: 42 (EST problem) |
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| 2004 Chevrolet Express 2500 4.8L Misfire Hello fellow techs. I need some suggestions on this van, custs complaint light blinks after driving on highway for a while. sure enough drive @ highway speeds usually 70 mph check engine light blinks. whats odd is you can't feel mis. check codes p0300 random m... Trouble codes: P0300, P0122, P0174 |
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| 1997 Geo Tracker 1.6L Code VIN: 2CNBE1865V Thanks for your help. I have a intermittent egr failure on this. about two weeks then it comes back. I have tested system completely and egr test pass most of the time however every know and then it fails. Trouble codes: P0400 |
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| 2002 Pontiac Bonneville SE 3.8L Starter VIN: 1G2HX54K52 HI. I have this bonneville that will not crank over. if i apply power to the starter solonoid starter works fine. i grounded the starter relay and starter works fine. i connected scanner and checked for antitheft code or disable problems. no codes or problems ... |
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| 2009 Pontiac G5 2.2L valves VIN: 1G2AS18H09 car was towed in by customer. said was driving 55 mph and went to increase speed, rpm shot up and car fell dead. tried to start and it acted like timing chain had broken. subsequent compression check revealed no compression and leak down test revealed air comi... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 2004 Cadillac Seville SLS 4.6L Misfire VIN: 1G6KS54Y44 Thank you everyone for your replies. We installed new plugs and swapped coil strips. Misfire followed rear coil when swapped to the front. Installed new coil stripped to correct misfire. The rear strip must get more heat then the front one. Installed Bousch O2... Trouble codes: 171 (Lean bank 1), 174 (Lean bank 2), 300 (Misfire), 150 (o2 sensor fault b2s1). |
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| 1999 Chevrolet K1500 LS 5.7L speedo non op VIN: 1GNFK16R3X the fix for this one was a new vcm. I learned from kenneth of pennsylvania that the output from the vcm should be a frequency of at least 500mv. thanks ken. I didnt even know what kind of signal i should be looking for. |
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| 2005 Chevrolet Cobalt SS 2.0L MIL Lamp on VIN: 1G1AP12P05 We checked and double checked the work we had done. This engine IS in time. We scoped the cam and crank sensor together and the patterns are consistant. No good example in the data base to match it to. This engine does not have cam phasers (it has solid ca... Trouble codes: P0017. |
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