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Professional Automotive Repair Technical Discussions for February 22, 2011 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1993 Cadillac DeVille 4.9L Poor Idle Quality, Stall VIN: 1G6CD53B7P This car came to me from another shop, where they had tried 3 tp sensors. Customer complant: engine will not run at idle when cold. I checked an vaeified it will not run idle when cold and stalls at stop lights unless you keep it off idle. Afer engine warms ... |
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| 2000 Chevrolet Silverado 2500 6.0L transmission VIN: 1GCGK24U0Y Well first of all I should say I am new to transmission internals and this is only the 3rd trans I have done (and maybe the last at this point). This tranny is a 4L80E out of a 00 silverado customer has lost reverse so I am overhauling completely along with ne... |
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| 2000 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC5242Y OK I have a no start when cold or maybe all the time, originally came in for no start. Tried to start ,cranked good wouldn't fire.Put propane in the snorkel and started and ran good for 2 days. Got cold overnight (5 degrees) and now it won't start and YES the ... |
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| 2003 Chevrolet Silverado 1500 LS 5.3L transmission VIN: 2GCEK19T73 looking for a known good wave form for the tps has electronic tps system -- no cable using snapon modis scanner suspect tps failure - looking for evidence 1 volt sweep to 12. good pattern is not known |
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| 2007 Chevrolet Tahoe LT 5.3L Poor Idle Quality, MIL Lamp on VIN: 1GNFK13027 Vehicle came in for warning lights including mil, trac off, reduced engine power,check for tsb and none found. found noted codes, graphed scan data, found app 1 @ .94, app 2 @ .45, tps 1 @ 3.67, tps 2 @ 1.33 all at idle. Problem occurs at acceleration, depress... Trouble codes: P0121 (throttle position sensor performance), P1516, P2119 (Throttle Actuator Control Throttle Body Range Performance), P2135 |
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| 1996 GMC Jimmy 4.3L Surge VIN: 1GKDT13W3T Cust brought back about a week after I had replaced lower intake gaskets and water pump for a what feels like a surge at freeway speeds. I check car over and found nothing different so I took it for a test drive and I did feel what he was talking about. Do not... |
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| 2005 GMC Sierra 3500 6.6L MIL Lamp on VIN: 1GTJK33255 Checked four glow plugs checked ok, truck starts good even in temp. around 20 deg. after sitting all night. Replaced glow plug controller started about 10 times and reset codes all eight glow plug circuits, still starts fine. Thanks for any help. Trouble codes: P0671, P0672, P0673, P0674, P0675, P0676 |
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| 2006 GMC Envoy SLT 4.2L Mechanical VIN: 1GKDT13S16 Hey guys got a 06 envoy that when its cold as in sits over night, when start in the morning it runs rough, misfires, has codes p0171, p0300, p2119 I cleared all codes and after i get it to run smooth the only code that comes back is the p0171, all cyl are misf... |
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| 2000 Oldsmobile Intrigue GLS 3.5L Engine VIN: 1G3WX52H9Y I'm getting a loud pop/knock noise from the front of the motor. It sonds like its at the belt idler pully. I took it off and put a good used on and I get the same noise. It doesnt do it all the time and it took a couple of trips to our shop before I heard it. ... |
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| 1997 Pontiac Grand Prix GTP 3.8L starter VIN: 1G2WP1219V Car will not crank. No power to the Purple S terminal wire. I followed Mitchell flowchart, disconnected neutral safety switch, had 12v at yellow wire, replaced the switch per the chart, no difference - still no crank. If I connect the neutral safety switch and... |
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| 2000 Pontiac Montana 3.4L starter VIN: 1GMDX03E6Y i have this van it will not crank over. i can jump solenoid cranks fine. got to the crank relay i have power there and if i ground pin 86 yellow/black wire cranks fine. checked pcm crank fuse it is good. went to computer pin 23 purple wire has power there in c... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 2000 Cadillac Eldorado ETC 4.6L Compressor VIN: 1G6ET1296Y first of all thanks to everyone for taking the time to help me on this car after all this checking I ended up replacing the a/c programer which is located under the dash on the passenger side close to the A-pillar there was some corrotion at the connector due ... |
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| 2005 Cadillac CTS 3.6L Mechanical VIN: 1G6DP56735 Purchased cam holding tools and assembled chain. We have done several German cars that needed the chain tensioner preloaded one way or the other, so I guess we were making it harder than it was. Just didn't want to do it twice. Thanks for the help. Howard |
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| 1996 Chevrolet K1500 WT 4.3L No Start VIN: 1GCEK14W5T Well this one still has me stumped. After following everyones ideas, checking all my grounds and even replacing them, added fresh fuel, swapped in other known good parts. It still will not start all the time. At this point it might start if it feels like it. N... Trouble codes: P1351 (IC Circuit High Voltage). |
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| 2002 Chevrolet Blazer LS 4.3L Misfire, MIL Lamp on VIN: 1GNCT18W82 SORRY IT TOOK SO LONG TO CLOSE, BUT WE WERE WORKING ON THIS AS WE COULD FIT IT IN. WE FINISHED IT UP LAST WEEK. THE PROBLEM WAS THE EXCESSIVE MAIN BEARING CLEARANCE CAUSING THE CRANK TO BOUNCE AROUND. WE WERE LOOKING AT EVERYTHING ELSE TO CLOSELY I GUESS. I DO... Trouble codes: P0300 (Random misfire). |
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| 2006 Chevrolet Monte Carlo LT 3.9L Steering VIN: 2G1WK15166 Well sorry for the delay but the customer has decided to live with the problem. However i was able to make a device for bleeding the ps system. A ruber expandable freeze plug with the screw removed and a vacuum conector glued in worked great. |
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| 2008 Chevrolet Silverado 3500 HD LT 6.0L 4x4 VIN: 1GBJK39K88 Thanx for all the replies. The indicator in the IPC (instrument cluster) clearly shows the vehicle locked in 4X4 the small dot on the electronic control is insufficent to alert the operator the vehicle is locked up in 4X4 the next chance I get I am going to... |
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| 2000 GMC Jimmy SLT 4.3L Engine VIN: 1GKDT13WXY Well what can I say? You guys were right on the money. The #6 rod was really really badly chewed up. The rest were pretty nasty too. The mains were chewed up as well, so I can only imagine what the oil pump looked like inside. We decided to throw some bearing... |
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| 2003 GMC Yukon XL 1500 Denali 6.0L No heat VIN: 1GKFK66U43 So the customer just returned with the vehicle. As some stated I was missing my results from what my temps were.. Tested the entire cooling system and all the hoses. All #s were normal inlet and outlet of radiator and heater hoses were good. Found that it was ... |
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| 2002 Pontiac Grand Am SE 3.4L Hazard switch VIN: 1G2NF52E02 Thanks for the help. We checked all the fuses - OK. Grounds - OK. Then checked the wiring from the hazard switch. We found a marker light pigtail with a 194 bulb wired in the harness. The bulb was taped up with electrical tape so you could not see the light. A... |
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