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Professional Automotive Repair Technical Discussions for May 24, 2007 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 2002 Buick Rendezvous CX 3.4L compressor VIN: 3G5DB03E32 The vehicle came in & condensor was leaking. Replaced condensor & recharged system.Compressor would not engage so checked for codes.The HVAC module had a U1016 Loss of PCM Comm. The HVAC module requests A/C & the PCM also rquests A/C until the PCM tries to eng... |
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| 1992 Chevrolet K1500 Cheyenne 5.7L poor power VIN: 1GCEK1421N FIRST IT CAME IN TO SHOP FOR RUNNING RICH. FOUND MAP VACUUM LINE MELTED TO EGR VALVE.MAP VOLTAGE AT 4.8 IDLE DUMPIMG FUEL lol. FIXED.NEXT TEST VACUUM READING COMPAREWD TO MAP READING. CAT WAS RESTRICTED. TOOK EXHUST LOOSE. GOT GOOD VACUUM READING NOW. WEEL WEN... |
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| 1995 Chevrolet Lumina APV 3.8L Stall, MIL Lamp on VIN: 1G2HX52K25 need some trying to find out what is causing quad 1 code and quad 4 code.I have checked the wirirng,fuse's and i have voltage to the trans and the alternator is also working. Anybody have a clue as what i need to check for or does anyone know what the problem ... Trouble codes: 1430 (Quad driver 1), 1470 (Quad driver4) |
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| 1996 Chevrolet Lumina APV 3.4L Misfire VIN: 1GNDU06EZT van came in with a rod knock. replaced engine with used 2002 3.4l with 50k. costomer is union man always gone. he complained of surging at highway speeds. van has a miss on #1. but also on # 4,5,6 #1 miss comes and go's. #4,5,6, are connected in the fact they ... Trouble codes: P0300 (missfire) |
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| 1999 Chevrolet Blazer 4.3L fuel guage VIN: 1GNDT13W1X a po 463 fuel level circut high voltage is set. i have traced the wires to the computer and they checked ok. i have replaced the fuel pump and fuel sender unit. i ran the diagnostic as per alldata. is it possible that the computer could be bad? the same code k... |
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| 2000 Chevrolet Blazer LS 4.3L compressor VIN: 1GNCS13W3Y This is my main acct. they bought this truck at auction and climate control didnt work.I have removed all the messed up shade tree wiring. Now I have no power to cycling switch. With OTC on the BCM, It shows there is no command to activate ac when AC button is... |
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| 2002 Chevrolet Tahoe LS 5.3L transfer case VIN: 1GNEK13Z22 i was getting a racheting noise from the transfer case area last summer and now that the weather is warming up again the noise is back. it was not there all winter long. the noise is there in 2wd when i first take off and goes away shorty. if i let off the gas... |
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| 2005 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC52F95 After what I wrote in the history, the car returned. We had no power to pump. If I am understanding this circuit correctly, we have power from ECM and from fuse both to relay, but not to pump. Removed fuse box and have found no issues under fuse block that are... |
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| 2002 GMC Yukon XL 2500 SLT 8.1L transmission? VIN: 3GKGK26G02 halp , help , help. we have severly narrowed the playing field , but the issue still exists. while driving along the highway about 68 mph you begine to hear a noise and feel a noticable vibraion ( it is not in the tires , trust me!!!) it gouse away around 78 ... |
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| 2001 Pontiac Sunfire SE 2.2L Poor Idle Quality VIN: 3G2JB12441 Desired Idle always at 600rpm. IAC is hovering around 600rpm and the whole car is shaking. At 700rpm (using Scantool), the car is idle smooth. There are no codes at all using Enhanced Data Scan, and there are no drivability issues, just the low idle and the d... |
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| 2000 Saturn LS2 3.0L timing belt marks VIN: 1G8W52R4YY I've checked with Mitchell and Alldata, and research the fix data-base {am aware that Cad Catera same} and I'm still confused with exactness of line-up and procedure from start to finish. I've read that gear sprockets are interchangeable, and so are the marks,... |
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| 2001 Saturn L300 3.0L odometer VIN: 1G8JW54R41 This car is a repo. Came in runing bad. Scan test had code for mass air flow. Replace air flow sensor.Runs great.Odmeter reading 94978 when car left. Bank towed car to auction. Came back because odmeter reading changed to 694978 don't know what happened. scan ... |
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| 2003 Saturn L200 2.2L Starting VIN: 1G8JU54F83 Hi everybody I have a Saturn L200. the customer's problem was that the car was hard to start, and then it would stall. I found that when I cranked the car over 3-10 times the car would start then stall right away. If I held the key in crank position the car wo... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1993 Buick Park Avenue 3.8L Poor Idle Quality, Hesitation Allright guys thanks for the help looks like my scanner was false used a old otc 2000 and good data. Pulled mass air flow and cleaned it and seems to run good now excepet for a little idle roughness but the hestation is gone. thanks for the help |
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| 1992 Cadillac Eldorado 4.9L MIL Lamp on VIN: 1G6EL13B4N Thanks everyone for replying to my post! Well I finally got the communication UART line to lose communication again, and carefully decided it was time to disconnect each module one by one and bypass UART line to search for my bad module. First place i went bas... Trouble codes: E052 (pcm memory reset), A11. |
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| 1991 Chevrolet V3500 Silverado 6.2L shifting VIN: 1GCHV33N3M thanks very much for everybody's help on this project.i had the a and b solenoid wires mixed,input speed wiring not connected and temp wiring in wrong cavity.truck is running great now and trans working well.k.w. |
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| 1994 Chevrolet C1500 5.0L Hesitation VIN: 2GCEC119H0 I'm very sorry for the delay in responding. The customer came and picked up the truck before we got a chance to investigate what everyone so graciously offered. She is supposed to return the truck to us later so I'm saving all your responses and will let you k... |
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| 1998 Chevrolet Tahoe 5.7L MIL Lamp on VIN: 3GNEK18R1W Thanks everyone...He changed the canister vent valve and all seems to be fine. It feels good to help an old mechanic, and he thanks each and everyone of you. Trouble codes: P0446. |
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| 2002 Chevrolet Malibu 3.1L security system VIN: 1G1ND52J02 Sorry for the delay in closing this, but I have not heard from either customer since this was posted. I contacted one and he said he took it to the dealer because he had a service contract. They told him they could not find a problem. Go figure! 21 of y'all re... |
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| 2001 Oldsmobile Silhouette Premiere 3.4L MIL Lamp on VIN: 1GHDX03E71 thanks to those that replied, it was kevin from minnesota that hit it on the nose. the wiring schematic mitchell has is totally diffirent from dealer. i found that the isulation was ok on the cam sesnsor but the power side of sensor was shorted to ground inter... Trouble codes: P1336. |
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| 1993 Pontiac Bonneville SE 3.8L Excessive Emissions, Poor Idle Quality, Surge, Poor Fuel Economy, MIL Lamp on VIN: 1G2HX53LXP Hi everyone. The vehicle is fixed. I believe I was brain dead yesterday when I was diagnosing this vehicle. The pcv valve was the source of the smoke in the crankcase. thanks to Kent from Florida,Robert from Texas, and Dennis from Massschusetts on that one. Th... Trouble codes: 44 (lean oxygen sense). |
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| 1995 Pontiac Bonneville SE 3.8L MIL Lamp on replace pcv housing with new orings from dealer fixed it thanks for all your help. |
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| 2002 Saturn Vue 2.2L guagestuckon3/4 VIN: 5GZCZ23D82 after responce, have learned that car needs to go back to saturn to replace cluster & flash pcm. |
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