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Professional Automotive Repair Technical Discussions for August 28, 2009 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 2003 Buick LeSabre Limited 3.8L EBCM Module VIN: 1G4HR54K53 Vehicle came in with ABS light, Red Brake light, and Traction control light all on. Scanned vehicle with Snap On Modis and retrieved codes C1214 & C1255. One of those indicates an internal fault in the EBCM, the other just indicates that the PCM has turned on ... |
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| 1999 Cadillac Seville STS 4.6L bleed VIN: FKJKLFS569 does ny one know the procedure for bleeding this system |
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| 2004 Cadillac DeVille 4.6L d/s window VIN: 1GKD54Y74U vehicle came in from a local used car dealer, with d/s window, power door lock and mirror all inop initially tested for powers and grounds at window master switch, everything was all powers also repaired bad ground to system, we replaced switch and now with ne... |
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| 1997 Chevrolet Astro 4.3L No Start, HARD STARTING VIN: 1GBEL19W5V Hi everyone i have a problem child here.this astro van will start very hard after is sits over night.once it starts it runs good. There is no codes. I check the spark and that is good. Fuel pressure is 60lbs when the key is turned on. it drops to 58 after the ... |
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| 1999 Chevrolet Metro 1.0L MIL Lamp on VIN: 2C1MR2260X Car came in with light on, Code po400. No drivability complaints. Tech 2 scanner showed computer is commanding valve properly(19 inches vacuum to valve, valve opens all the way) - Manually applying vacuum to valve the engine DOES stall out. Cleared code & road... Trouble codes: P0400 |
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| 2002 Chevrolet S10 4.3L 4 wd VIN: IGCDT19W02 This is a strange one. truck sounds like its trying to go into 4 wheel drive low? vibration and rubbing noise changes with road speed but this is the strange part it only happens on long hills at 50ish mph and only going up hill, you must go at least 1/8th of ... |
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| 2002 Chevrolet Avalanche 1500 5.3L Air Mix Control Motor VIN: 3GNEK13T42 This vehicle does not switch from hot to cold when using the control head. I can control this system with my Snap On Verus. I can also control the door by adding a 3amp fused jumper on the control wire to the 5v ref. Looking at my voltages all the power and gr... |
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| 2005 Chevrolet Astro 4.3L radio/cell phone VIN: 1GCDM19X35 Hello all you IATN gurus,i really have a wierd one here.first off the truck is used for servicing atm machines,i dont see anything out of the ordinary,but when lifting truck seemed very heavy,anyway customer cannot talk on cell phone while in truck,i also trie... |
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| 2005 Chevrolet Trailblazer LS 4.2L Window VIN: 1GNDT13SX5 I tested the passenger side front door motor and its fine. The main switch on the driver side for the passenger door and the switch on the passenger door both are inoperable. I have power going into the switch board on the passenger side but no power coming ou... |
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| 2005 Chevrolet Silverado 1500 LT 5.3L t-case VIN: 2GCEK13TX5 This is my own pick up, I have been w orking arround this problem from 4th of july. After a 15-20 mile trip the truck will go into 4wd high and lock frt end accuator and will sometimes shift into auto from 4 high but it will not go into 2wd unless truck has sa... |
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| 2006 Chevrolet Silverado 3500 LS 6.6L MIL Lamp on, P0087 VIN: 1GBJK34D86 This vehicle is actually a cab and chassis with an ambulance body. Sets code P0087, insufficient fuel rail pressure. Test with GM special tools as per SI. Pressure the fuel test port to 10 psi and pressure drops pretty fast. Should hold 10 psi for 2 minutes an... Trouble codes: P0087 (Insufficient rail pressure) |
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| 2007 GMC Acadia SLT 3.6L MIL Lamp on, traction control off VIN: 1GKER3357J Hello Techs, Thanks for reading. We have this vehicle in the shop for a second time in two weeks. Originally we repaired a P0442 dtc for evao emmisions small leak. This involved removing the fuel tank and replaceing the evap vent solenoid. We returned the vehi... Trouble codes: P0171 (lean bank 1), P0174 (lean bank 2), P0496 (excessive evap flow) |
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| 1997 Pontiac Grand Am SE 2.4L Unknown VIN: 1G2NE52T2V this is my girlfriends car she said she was driving home had to brake hard and now the car locks up one wheel and skids this car has done this to me several times mostly in the mornings like only the rear brakes work i have seen several of these cars cavaliers... |
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| 2006 Pontiac Grand Prix 3.8L MIL Lamp on VIN: 2G2WP55266 Found no resistance in the black/white wire from ecm to o/2 sensor. ran a seperate wire just to make sure. when vehicle starts cold it spikes to 1.97 amps in the first 10 seconds and sticks the code in the ecm. has to sit with key off for 10 hours before it wi... Trouble codes: P0053 |
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| 2006 Pontiac G6 3.5L Poor Idle Quality, Hesitation, Surge, MIL Lamp on VIN: 1G2ZG55876 Hello techs, I’m looking for some help in confirming a diagnosis. Customer stops for fuel and car will not restart. Customer states no previous problems but they “knew they needed a battery". Gets a jump start, car starts but has no power, display reads “vehic... Trouble codes: U0107 (Loss of comunication between TAC and ECU) |
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| 2002 Saturn L200 2.2L body control VIN: 1G8JV54F32 The body control on this saturn locks up intermittantly-it then ceases to function until it is powered down (battery disconnect)and restarted I want to replace the control but they are backordered (with no ship date) I have access to a used control -I need to ... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1984 Cadillac Eldorado 4.1L battery lite VIN: 1G6AL5784E i took the [...] wire coming from alt to inner dash and supplied temporary voltage bump with spring loaded toggle switch as module was too high for my customer, worked out fine.thanks to all for leading me to right side of problem and corrected perfect,no lite... |
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| 1995 Chevrolet Monte Carlo LS 3.1L Engine noise VIN: 2G1WW12M3S I got the car back today and checked all the replies and everything seemed good. Customer wants to wait till noise gets worse. Thanks for the replies. |
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| 1998 Chevrolet Cavalier Z24 2.4L No Start, Stall VIN: 4G1JF32T8W sorry guys haven't fixed this one yet being a 1 man show with 3 of these basket case jobs at the shop.i was getting so far behind that I had to let them sit and do some work that would pay the bills. The last thing I did was get a used ecu for a returning po3... Trouble codes: P0342, P0335, P0507. |
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| 1998 Chevrolet Corvette 5.7L Accessories VIN: 1G1YY32G2W GOOD MORNING,JUST ABOUT EVERYONE WAS RIGHT,AFTER INSTALLING THE RELAY KIT PER TSB. THE NEW RELAY WENT BAD LIKLEY BECAUSE THE COLUMN LOCK MOTOR HAD SOME PROBLEM.TO FIX THE PROBLEM,GM DOSENT SELL THE RELAY WITHOUT BUYING ANOTHER KIT, IS TO CALL THUNDER RACING 1-... |
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| 2003 Chevrolet Tahoe LS 5.3L change oil lite VIN: 1GNEK13T11 Thanks to everyone, there were lots of useful ideas. I m not sure which one exactly took care of the light but i believe just letting it sit over nite was key. this morning the reminder was gone. Thanks again! |
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| 2006 Chevrolet HHR LT 2.4L MIL Lamp on VIN: 3GNDA23P06 At ECM C2 connector, repeated a continuity test while wiggling wires and found high/erratic resistance. Problem found to be power feed wire (Pnk/Blk) breaking inside insulation at actuator solenoid connector as it bends out of connector body. Same test afte... Trouble codes: P0010. |
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| 2006 Chevrolet Cobalt SS 2.4L cruise control VIN: 1G1AM15B26 Unfortunatly i haqd to pass this one on to another tech here and all he'll say is he added a ground wire. he wont tell me to which circuit or module. thanks guys for all the help. |
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| 2008 Chevrolet Suburban 2500 LT 6.0L Misfire VIN: 3GNGK26K18 The majority of the replies indicated internal mechanical issues and they were right. The vehicle was taken to a GM dealership for warranty repairs. They replaced the camshaft and 16 lifters. The head gaskets and bolts were also replaced. Trouble codes: P0304 (Cylinder 4 - missfire detected). |
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| 2000 GMC K2500 Sierra SL 5.7L Wide open throttle VIN: 1GTGK24R5Y WELL FIRST LET ME SAY THANK YOU TO EVERYONE THAT REPLIED TO THIS POST. EVERYONE HAD GREAT IDEAS. THE PROBLEM DID END UP BEING THE FUEL PUMP. AFTER RULING EVERYTHING ELSE OUT, I REPLACED IT AND THE TRUCK RUNS GREAT AND I'M GETTING HIGHER PRESSURE.THANKS AGAIN. |
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| 2004 GMC Yukon XL 1500 SLT 5.3L transfer case shift control VIN: 3GKFK16Z54 Thanks to the 10 techs who replied to my post. It was what most of you said, the encoder sensor. A special thanks to steve for going in to so much detail about how to get to the sensor and also about shifting it through all the positions koeo to prevent gea... |
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| 2001 Saturn L200 2.2L No Start, Stall VIN: 1G8JU52FX1 Sorry for the long wait everyone, was just wanting to make sure this one was gone. The problem ended up being in the wiring above the tank. It had an intermittent connection somewhere in the short wire on top. As some of you stated you should always change out... |
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| 2007 Saturn Ion-2 2.2L MIL Lamp on VIN: 1G8AJ55F47 Thank you to everyone who replied. Yes, the ECT is a typo. More run time continued to show several misfires on #2 cylinder. We switched the injector and the miss moved with it. Our local dealer had one in stock for $35. We installed it and test drove it m... Trouble codes: P1174 (Fuel Trim Cylinder Balance). |
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