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Professional Automotive Repair Technical Discussions for July 8, 2016 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1999 Cadillac Eldorado ETC 4.6L Misfire, MIL Lamp on VIN: 1G6ET1290X car came in with cylinder #5 misfire, swapped coils, spark control moduler, plugs, wires, mis stayed on #5. smoked tested smoke came out end of intake. replaced intake, still have # 5 cylinder misfire, tested wires between injector and pcm, did injector balanc... Trouble codes: P0300, P0305 |
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| 2000 Chevrolet K2500 5.7L Misfire VIN: 1GCGK23R4Y customer complaint was transmission had no lockup. on the test drive noticed that the misfire monitor was counting steady on cylinder 2 at 2000 rpm. cleared misfire monitor and truck went straight into lock up. no actual misfire was detected. suspected ac volt... |
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| 2001 Chevrolet Silverado 2500 HD 8.1L Extended Cranking VIN: 1GCHK29G91 Truck came in with a P0342 and P0336. Cleared codes and P0342 returned testing showed no cam sensor signal. Replaced cam sensor and code cleared but still has an extended crank. Checked signal at PCM for cam and crank shows to be in sync with a good scope patt... |
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| 1999 GMC C6500 Topkick C6H042 7.4L Backfire extended cr VIN: 1GDJ6H1D9X Vehicle came in from another shop with a customer complaint of backfiring and misfires. Other shop could not get vehicle to mis but was able to get backfire to occur. Came to our shop running fine, let sit over night tryed to start in morning vehicle had an ex... |
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| 2004 GMC Sierra 2500 SLE 6.0L transfer case VIN: 1GTHK23UX4 Hi all and thanks in advance. Customer brought in truck and did service for all diffs and transfer case. Transfer case was way overfull with fluid so removed and replaced input seal and refilled. Within 100 miles came back with complaint of popping out of gear... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 2005 Buick LaCrosse CXL 3.8L DIC system VIN: 2G4WD532X5 First...thanks to those who replied. I think I'll close & say it is fixed unless something else turns up. Here's a little background on the problem...I am a retired tech & have no ready access to scantools or a manual nor had any previous experience with this ... |
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| 2010 Buick LaCrosse CXL 3.0L Hesitation, Cuts out, Stall VIN: 1G4GC5EG5A Thanks to all who replied The car is fixed ! After scoping g121 gound Circuit and high speed can the problem was clear . The gound voltage was rising up to 6.5 volts when engine loaded. The ground terminal on front right cylinder head was damaged ( ha... Trouble codes: U0100, U0101, B3883. |
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| 2006 Chevrolet Impala LT 3.9L Chime VIN: 2G1WC581X6 Thanks for all the help. As was stated the chime was not because of the seat belt. What I did was diagnose all of the other problems like the traction control system. Only the right front wheel speed sensor was reading. I replaced the drivers front and repaire... |
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| 1999 GMC K3500 Sierra SL 7.4L Misfire VIN: 1GDJK34J5X Well, I appreciate all the help you offered but I am still fighting with this truck. A lot of you said to check the Catalytic converters, they are good. Some talked about a broken valve spring. As stated in the original post, they all check out good. My igniti... Trouble codes: P0300 (Multiple misfire detected), P0306 (Misfire cylinder 6). |
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