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Professional Automotive Repair Technical Discussions for August 7, 2017 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1993 Buick Roadmaster 5.7L Excessive Emissions, Cuts out, Poor Fuel Economy VIN: 1G4BN5375P Customer states that vehicle will surge. Oil pressure will go high then low then back to high. Also vehicle will not accelerate. Test drove. No problems found. Customer brought back vehicle. Test drove again. This time the top speed was 5 mph. Pulled off air ... |
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| 1994 Cadillac DeVille 4.9L Excessive Emissions VIN: 1G6KD52BXR I tried hooking up two scan tools to it. no luck bosch and verus wont read data. checked vacuum- Good. recheck spark plugs all look good plus rechecked gap. all wires are good no chaffing.went ahead and replaced both upstream O2. looked for vacuum leaks... non... |
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| 2009 Cadillac Escalade ESV 6.2L No Start, Cuts out, Stall, MIL Lamp on VIN: 1GYFC262X9 vehicle came to me with this code p0016. the owner had replced cam senor and crank sensor. fuel injectors, throttle body o2 sensors. the car would loose power and timing would not change it wouldnt advance. so i looked at it and have a good oil pressure readin... Trouble codes: P0016 |
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| 2007 Chevrolet Colorado LT 3.7L Mechanical VIN: 1GCDT13E67 Customer brought truck in complaining of a coolant leak. Found head gasket leaking coolant all the way around. Customer stated they had had the engine "rebuilt" 2 days prior at a shop in North Dakota and then drove 1300 miles straight to our shop in Arizona, s... |
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| 2008 Chevrolet Express 3500 6.0L Hesitation, no power VIN: 1GBJG31K18 this is a cutaway van with a shuttle body dropped on. the van has no power once hot taking off from a stop. once above 30 mph shuttle drives fine.on acceleration from a stop, the rpm's will only increase 200-400 and bus will very slowly chug up to speed. I'm l... |
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| 2009 Chevrolet Cobalt LT 2.2L Cooling Systems VIN: 1G1AT58HX9 Getting antifreeze in engine oil.Do these waterpumps leak internally without any signs of leaks on the outside?I have changed these pumps before and have the tool to hold timing chain for pump removal but I have never seen antifreeze get in the oil before on t... |
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| 2009 Chevrolet Traverse LT 3.6L Transfer case seal VIN: 1GNEV23D79 Looking at this 09 Traverse, it is leaking from the transfer case on the passenger side axle shaft seal. Looks like from the out side there is an o-ring, then a bearing w/ a couple of snap rings around it. Looks like the seal then is further in and is put in f... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 2008 Cadillac SRX 3.6L ABS system VIN: 1GYEE43718 Thanks to all, this Cadillac is fixed. After getting numerous replies about a possible wheel speed sensor fault, I individually scoped all wheel speed sensors. All had perfect waveforms and no glitches. I noticed once in a while when driving I had a degree an... |
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| 2011 Chevrolet Silverado 2500 HD LTZ 6.6L MIL Lamp on, reduced power mode VIN: 1GC1KYE81B Many Many thanks to all who replied! I had six replies to my request and all were very helpful. Paul suggested to make sure the ecm software was the current version, this was done when I saw a tsb regarding just that last week. Bradley mentioned the egt sens... Trouble codes: P2463. |
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| 2014 Chevrolet Silverado 1500 High Country 6.2L Unknown VIN: 3GCUKTEJ5E Thanks guys. Before this truck was brought to me the customer called GM to see if the tcm was covered under the powertrain warranty and he was told it wasn't. When I told him that some of you said it should be under the powertrain warranty he made some more ca... |
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| 2011 GMC Sierra 2500 HD SLE 6.6L No Start VIN: 1GT120C81B Well this one is fixed and down the road. Most of you said there was metal throughout the system, which i agreed with. I was hoping to save my customer some money by just replacing 1 or 2 injectors that might have had metal stuck in them. But in the end i e... Trouble codes: P2146 (Injector Supply Voltage Group 1 Symptom 00). |
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