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Professional Automotive Repair Technical Discussions for March 10, 2014 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 2004 Cadillac CTS 3.6L MIL Lamp on, Reduced Power Mode VIN: 1G6DM57754 Need the help of IATN GM experts-only code P2122 returns and engine goes into reduced power mode.Believed cut & dry repair fit TSB exactly. P2138 is gone ECM replacement cured P0606 as it should have.All wiring intact & nothing rubbed.Have checked C104 Connect... Trouble codes: P2121 (APP Sensor 1 Performance-Circuit Low) |
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| 1988 Chevrolet K2500 Cheyenne 5.7L Hesitation VIN: 1GCFK24KXJ This truck hesitates on hard acceleration. Almost feels like a restricted exhaust, however it is not restricted. Feels like it's not getting the proper amount of fuel. Pressure and flow is correct. I also noticed that the fuel pressure does not increase under ... |
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| 1998 Chevrolet K2500 Cheyenne 5.7L transfer case VIN: 1GCGK29R9W the t/case is searching for position with the key off.with ignition on it will search and land only in 4lo.the relay in the tccm clicks and sends power from blk to red wires at the encoder motor. i have unpugged all the peripheralls that input to the TCCM and ... |
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| 2002 Chevrolet Silverado 1500 LT 5.3L No Start This my personal truck. It died when driving home about a block from the house. I had an idea it might be the fuel pump, as it was original. I checked fuel pressure,and it's zero. I rigged up my injector canister with gas; hooked it up to fuel rail, and drove ... |
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| 2005 Chevrolet C4500 Kodiak C4C042 6.6L fuel VIN: 1GBE4C3255 engine smokes heavy black lock of power and knocking I am not to familiar with diesel engines i have no trouble codes did a cylinder contribution test all 8 cylinders withing 2 to 4 rpm from each other. |
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| 2005 Chevrolet Suburban 1500 LT 5.3L cylinder #6 misfire VIN: 3GNEC16Z05 misfire cylinder #6. not a complete mis. smooths out while driving. changed all spark plugs. swapped injectors, coils, ignition wires. check injector and coil signals. compression test was 30psi lower on cylinder 6 then other cylinders. removed valve covers an... |
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| 2005 Chevrolet Silverado 1500 4.3L Stall VIN: 1GCEC19X35 I have tested all sensors for 5 vt and signal issues. I found a broken wire and the wrong pig tail for the ECT and replaced them. I have done the wiggle test. reflashed the pcm and theft. at this time I checked volt drops at the pcm on power and grounds. back ... |
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| 2009 Chevrolet Malibu LT 2.4L Cuts out, Stall, Bucks VIN: 1G1ZJ57B09 Car can be driven any number of miles (3, 29, 50) before it occurs. Bucks at road speeds or dies at lights. Always restarts and always has all for codes - P0201, P0202, P0203 and P0204. No shorts, opens or voltage drop across injector harness on power supply ... Trouble codes: P0201 (Injector 1 control circuit), P0202 (Injector 2 control circuit), P0203 (Injector 3 control circuit), P0204 (Injector 4 control circuit) |
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| 2003 GMC C5500 Topkick C5C042 8.1L propane tank VIN: 1GDG5E1E03 propane backfeeds from primary tank to secondary tank as fuel is used, causing vehicle to run out of propane and no start. I am sorry but I have no knowledge of this system at all. is there a switching valve that might be defective, if so where? Are there any ... |
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| 2000 Saturn SL1 1.9L No 2nd 3rd VIN: 1G8ZG5283Y Hello everyone and thanks for the input on this manual transmission Saturn SL. The vehicle came to us and the customer is unable to get the shifter to engage 2nd and 3rd or reverse. You can clutch and get the shifter to pull down but won't grab the gears and a... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 2007 Cadillac Escalade 6.2L Unknown VIN: 1GYFK63827 Thanks to all that replied, those who stated it was a hydraulic problem were correct. Disassembled valve body and found the #1 check ball half the size of other check balls, it was wedged in separator plate. Plastic check balls, maybe not a good idea. After re... |
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| 1992 Chevrolet S10 4.3L shifting in to 1st VIN: 1GCCS14Z4N Well this bad boy is fixed.After taking another look at the slave cylinder it was moving but I guess it wasn't pushing all the way out.As most of you said the clutch wasn't fully engaging and this was causing the hard first gear shift.I did end up replacing th... |
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| 2002 Chevrolet Astro LS 4.3L Door Locks VIN: 1GNEL19X62 install & re-program the new BCM , test drove the vehicle & its all good |
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| 2002 Chevrolet Tahoe LS 5.3L Mode Door VIN: 1GNEK13Z52 I would like to thank everyone for their quick responce on my headache.Sometime the simplest thing can be the biggest nightmare.I want to thank Michael [...] especially for taking time out on a Sunday to explain how the system works.I want to thank all my B... |
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| 2006 GMC Envoy XL SLT 4.2L Unknown VIN: 1GKES16S16 THANK ALL OF YOU GUYS THE TRUCK IS FIX THE PROBLEM WAS THE SAS SO I REPLACE THE SAS CODE CO455 WENT AWAY . THE PROBLEM I PUT A AFTER MARKET SENSOR ON SAME CODE SO I READ THE FLOW CHART AGAIN THE PROBLEM WAS THE SENSOR REPLACE WITH A OEM PROBLEM FIX THANK YOU ... |
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| 2007 Hummer H3 3.7L chime VIN: 5GTDN13E57 I believe Dave is right about the radio. We could not get some of the controls to work properly & could not get it to program certain things. After discussing it with the customer, he suddenly remembered that the radio did not always work correctly & had iss... |
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