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Professional Automotive Repair Technical Discussions for April 21, 2016 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1989 Chevrolet C2500 Cheyenne 5.7L battery VIN: 2GCFC29K3K I have removed every fuse and disconnected every circuit breaker I can find, removed an unused CB radio, disconnected the ECM and ABS module, and various other devices under the hood and under the dash. I still have a 1.8 amp draw on the battery, although that... |
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| 1994 Chevrolet Corvette 5.7L a/c VIN: 1G1YY22P2R Customer concern is that the A/C control head controls become unresponsive after about 30 seconds of KOEO or KOER. "Frozen." Cycle the key (or unplug the control head and plug back in), and the controls will start working again for another 30 sec or so. Sound... |
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| 1999 Chevrolet C2500 Suburban 7.4L Misfire, MIL Lamp on VIN: 1GNGK26J7X The misfire counter shows 1 miss on cyl 1, 2 misses on cyl4, then no miss at all. Rev a few times and get a miss on cyl 4. It is not consistently missing. I think the negative trim is from the slight occasional miss, allowing unburned fuel into the exhaust. Cl... Trouble codes: P1133 (O2 lean) |
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| 2007 Chevrolet Silverado 3500 Classic LS 6.6L No Start VIN: 1GBJK34D17 We towed this duramax in from another shop that replaced brake lines then took vehicle for test drive and the truck died. They replaced fuel filter and stopped there. I got the truck scanned for codes. only codes present were for a couple of glow plug circuits... |
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| 2008 Chevrolet Impala SS 5.3L Mechanical VIN: 2G1WD58C68 Tow in, stalled going down the road. Rolls over with no compression ,loosened rockers and rechecked compression 150 psi.. Rockers are all moving while cranking. no abnormal noise while cranking, oil looks good customer says they no problems up to this point. Q... |
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| 2009 Chevrolet Malibu LS 2.4L no start VIN: 1G1ZG57B49 car came in with a no start. went to scan for codes it says no communication so check others abs trans air bag all say same when scanning for codes but it will let me read data but no codes. im thinking its a ecm but would like others input tks |
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| 2010 Chevrolet Impala LS 3.9L engine VIN: 2G1WD5EM2A hello all this car has just a very slight misfire just enough to set the check engine light on actually the first five or ten minutes cold you dont see the miss on the scanner also if i raise the rpm even a 100 rpm i dont see the misfire it comes up random mis... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 2004 Buick Rainier CXL 4.2L MIL Lamp on VIN: 5GADT13S14 Performed crank/cam correlations scope test again. Found cam and crank out of time. Used waveform library and a 2006 GMC test car to compare the wave form. Removed valve cover and exhaust gear. Found jasper phaser not clocked full advanced. Installed dealer ca... Trouble codes: P0016 (Cam Crank Correlation). |
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| 2004 Cadillac Escalade 6.0L Starting VIN: 1GYEK63N64 so check all grounds and battery connections and installed new starter into truck so far so good thanks for the information guys |
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| 2010 Cadillac SRX Luxury 3.0L not sure VIN: 3GYFNDEY4A After some more investigation we found the front u joint would at certain speeds/rpm the joint would act like it seized . We removed the complete driveshaft and found at a very slight angle it would bind sometimes , if it went past it was fine . Being a three ... |
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| 1999 Chevrolet Express 1500 5.7L Hesitation, Stall VIN: 1GCFG15R1X RE-CHECKED AL [...] READINGS REPLACED FUEL PUMP SAME PROBLEM, LOOKED AT I.A.T SENSOR READING WAY HIGH BUT CHECKED GOOD WIRING CHECKED GOOD TO P.C.M., TOOK A CHANCE AND REPLACED P.C.M. HAD GM DEALER DO A FLASH VAN RUN GREAT DROVE OFF AND ON TWO DAYS THIS ONE BEAT ME... |
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| 2011 Chevrolet Traverse LS 3.6L abs VIN: 1GNKVFED4B after checking all wiring and the sporatic movement of the left rear speed without it moving we sent to the dealer. ebcm was the ultimate fix. thanks to everyone who took time to reply and have a good summer. |
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| 2007 GMC Acadia SLT 3.6L delayed shit VIN: 1GKEV33747 As we narrowed down the possible causes for the bad shifts on this trans, myself and most of the replies talked of fluid issues on the 35r. maybe the valve body, a bad o-ring or a piston seal. I installed a shift kit upgrade in the valve body with some improve... |
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| 1998 Oldsmobile 88 Royale 3.8L temp gauge VIN: 1G3HN52K9W thanks guy & gals for all your help found the url line from the computer #15 tan wire to the cluster dropped out i think it was at the cpu. repaired the line and customer is happy. |
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