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Professional Automotive Repair Technical Discussions for December 16, 2008 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1995 Buick LeSabre Custom 3.8L No Start, start and die VIN: 1G4HP52L65 Car was towed to my shop, will crank, start and die. Will not stay running immediately dies soon as it starts. Seems like it idles high also, but again immediately quits running. It had the three codes listed until I changed the computer with a new one with no... Trouble codes: 123 (throttle position high), 670 (qdm4 failure), 406 (egr pintle position error) |
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| 2000 Cadillac Escalade 5.7L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on AFTER START UP, VEHICLE HAS "OK" IDLE, HOLDS STEADY AROUND 900 RPM. HOWEVER ON ACCEL, ESPECIALLY WOT, ENGINE SEVERELY HESITATES, BACKFIRES, COMES VERY CLOSE TO STALLING. CHECKED FUEL PRESSURE, FOUND GOOD RESULTS, 48-52 PSI. PRESSURE AT RAIL. REMOVED ALL SPARK ... |
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| 2006 Cadillac STS 3.6L Front Brakes VIN: 1G6DW67736 This is a weird one! If there are any techs that ran into this before please let me know. Car came in with a creaking/groaning noise when brakes are applied in forward direction. Could not find any TSB's for brake noise. Check lower control arm bushings. No pr... |
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| 1992 Chevrolet Lumina Euro 3.1L Poor Idle Quality, Stall VIN: 2G1WN54TXN Okay I got a real hair puller here. This 92 lumina has a 2.8 out of something else, not sure what. engine was put in 2 owners ago and was told "it never ran right since". customer stated that when it warms up it will stall at a stop and have to "two-foot" it t... Trouble codes: 34 (map sensor circuit low), 44 (o2 lean), 35 (iac error) |
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| 1995 Chevrolet Blazer 4.3L No Start, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1GNDT13W4S At first my customer could start the truck with a couple of sprays of starting fluid then that quit working and he put the fuel pump on the vehicle. Starts fine, runs okay until vehicle is warmed up. Then it is very rough idle & tries to stall with no power. T... |
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| 2000 Chevrolet Suburban 1500 LT 5.3L MIL Lamp on VIN: 3GNFK16T5Y we know this vehicle has a small evap leak. what we are wondering is if the vent solenoid is supposed to leak smoke at the top when grounded? the tech's snap on tool is in for upgrading. when not grounded it seems to vent wide openj to atmosphere. any insite o... Trouble codes: P0442 |
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| 2000 Chevrolet Blazer LS 4.3L transfer case VIN: 1GNDT13W3Y vehicle won't shift out of 4 wheel drive. items replaced in this order: shift motor, shift fork, vacuum switch. still have same results. only difference is that now I can shift it manually with a wrench where before it would not move easy at all. |
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| 2002 Chevrolet Silverado 1500 5.3L No Start, Cuts out, Stall, Misfire, MIL Lamp on VIN: 2GTEC19T32 Truck was towed in for a no start, had no fire or power to the fuel pump. We scanned and found crank sensor code. While we were testing vehicle it started for no reason. Ran perfect during extended test drive. We replace crank sensor and pigtail. Gave vehicle ... Trouble codes: P0122 (TPS Low Voltage), P0300 (Misfire), P0335 (CPK Circuit), P0336 (CKP Sensor performance), P0706 (Trans. range switch V1041 Loss of EBCM comm.), P1637 (Generator L ckt. malfunction P1638 Gererator F ckt. malfunction) |
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| 2003 Chevrolet Silverado 2500 HD 6.6L No Start VIN: 1GCHK29163 we have a diesel that won't start sometimes after a hot soak. we've installed clear plastic hoses on eace side of the filter assembly and have no air in system. we've scanned it and have no codes, but when it is not starting we have no, or a low reading for th... |
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| 2005 Chevrolet Colorado Z85 LS 3.5L No Start, Stall VIN: 1GCDT13665 Hi everyone, This truck will be running fine and just decide to shut down, happens when driving or when setting at idle after about 10 minutes or less. Then it will not crank over untill it is left set for a couple of minutes, sometimes longer than others. Whe... Trouble codes: P0601 |
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| 1992 GMC K1500 Sierra 4.3L cooling VIN: 1GTEK1423N this truck came in with a bad miss, so we put on new heads on. now the engine runs good, but o/heating.. new thermostat, good radiator, never has overheated before we put on the new heads... co2 test for bad head gasket, test ok. so i am thinking my tec instal... |
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| 2006 GMC Yukon Denali 6.0L Rear HVAC temperature blend door actuator VIN: 1GKEK63U96 It would be easy to blame the "Evil Car Gods" for this one but we all know that is not the case. A new customer brought vehicle in to have the rear HVAC temperature control repaired. He said he was supposed to bring it in to a local GM Dealer who just closed t... |
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| 1998 Oldsmobile Regency 3.8L blower motor VIN: 1G3HC52KXW Customer says heater fan works only now and then.Won't work now for me.No power at fan connection.I checked fuse-switched relays-giggled wires-tapped blower module.Alldata doesn't have the correct diagram.I have 4 relays and alldata shows 6.Alldata blower rela... |
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| 2007 Pontiac Grand Prix 3.8L key fob VIN: 2G2WP552X7 the customer dropped this off and he said that the remote (the only one he had left) would not work and he also bought 2 new remotes at the dealer. i tried to program them with the tech 2 but i could not and came up with a code b3101 keyless entry data link ci... |
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| 1997 Saturn SL1 1.9L reverse-& 1-2 shift VIN: 1G8ZH5286V I am looking for some opinions about the health of this Saturn trans. It has a slow engagement of reverse (2 or 3 seconds) and a harsh 1--2 shift, it also is harsh in the reverse apply. I have seen this before but never had a buyer complain about it. What I wo... |
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| 2002 Saturn Vue 3.0L Hesitation, Surge, Stall, Misfire, MIL Lamp on VIN: 5GZCZ63B02 still barely runs at idle, play with gas pedal and it takes off after back firing a few times. then it dies. then you have to do it all over again. when it revs up its like a runaway. you have very little control over rpm. Trouble codes: P0300 (random misfire), P0171 (lean bank 1), P0174 (lean bank 2) |
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| 2004 Saturn Vue Red Line 2.2L lubrication VIN: 5GZCZ23D14 Hope someone can help me help my local Grease Monkey with a problem. Grease Monkey changed customer's oil and had her come back 2 weeks later with a leak. Leak was at oil filter lid. They replaced the seal, ran engine for 10 minutes at both low and high RPM's ... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1995 Buick Riviera 3.8L Starting VIN: 1G4GD2210S Thanks for all the info on the Buick Riviera. The problem was the ignition switch not sending power the the fuse panel Charlie |
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| 2003 Buick LeSabre Custom 3.8L Cuts out, Stall VIN: 1G4HP52K73 We replaced everything we could. Computer, ignition switch, ignition module. I replaced the entire ground harness. I just could not pinpoint the fault on this one yet. It is sceduled to return next month to see if we can find it then. I appreciate all the ... |
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| 1998 Cadillac DeVille 4.6L rear knuckle VIN: 1G6KD54Y6W Ed from Ontario sent me some info about cadillacbushings.com. They have all the hard to get bushings for the cadillac knuckles.I haven't got them yet but it looks like the solution for $149.00 for both sides. Thanks Everyone Craig [...] |
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| 1988 Chevrolet V30 Silverado 6.2L knocking under load VIN: 1GCHV33J6J WELL TRUCK IS NOT FIXED, BROUGHT TO A LOCAL INJECTION SHOP, THEY SAID NOISE WAS INTERNAL, ALSO BROUGHT IT TO MY MACHINE SHOP AND TOOK HIM FOR A RIDE, THEN WE SENT OFF A OIL SAMPLE AND IT CAME BACK GREAT, NOW LEANING TOWARD INJECTION PUMP BUT WAITING TO SEE WHA... |
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| 1990 Chevrolet R1500 Suburban Scottsdale 5.7L up shifts warm truck went to bensalem,got a est of $600 to repair 3-4 clutch,band and drum,NOT inc R&R.Shipping out a replasement unit,its a 700 2wd,how much eazier could it get.oh well,costermer will be happy |
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| 1994 Chevrolet C1500 5.7L Hesitation VIN: 1GM35FG354 Thanks for everyones replys. Performed a fuel pressure test and drove fuel pressure stayed above 12psi. so I moved on, checked the pressure regulator, map sensor and tps, everything checked out. Egr valve would not hold a vacum at all, but found this was not t... |
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| 1994 Chevrolet C2500 Suburban 7.4L Compressor VIN: 1GNGC26NXR Fixed! Discovered we were using not only the wrong type, but too much oil. Once we got all the old oil out of the system, we recharged withe the correct oil and all was fine. Thanks for all the help. |
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| 1998 Chevrolet Cavalier Z24 2.4L Poor Idle Quality, Misfire VIN: 1G1JF12T6W Thanks to everyone for helping on this one, the timing chain was off 1 notch on back cam. I removed front cover and all its bolts, timing tensioners, timed everything, car runs great now. Thanks again for all the help. Lee Trouble codes: P0300 (multiple cylinder misfire). |
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| 2002 Chevrolet Express 2500 LS 5.7L Excessive Emissions, Misfire, MIL Lamp on VIN: 1GAGG25RX2 Did some further testing on intake ect.. Did not find any leaks, must be internal engine damage "using oil". Customer does not want to go any further. Fleet is in process of updating vans. Thanks for all the replies. Trouble codes: P0300. |
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| 2007 Chevrolet Monte Carlo LS 3.5L Excessive Emissions, MIL Lamp on VIN: 2G1WJ15KX7 Well, I have to admit that this fix was really easy, just needed to do a little out of the ordinaly research. As I suspected it was a flex-fuel problem and I will tell anyone that reads this, if you do not understand how theory of GM flex fuel vehicles work t... Trouble codes: P0172 (Engine rich bank 1). |
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| 1991 GMC C3500 HD 6.2L converter Thanx to all that replyed to my reqest.The most probable cause of the conv balooning was cooler line backup presure,as i cheked main line and is dead on spec,s,, crank checked ok,, Bus is back in service Thanx ,,Wes,, |
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| 1991 Pontiac Firebird Trans Am 5.0L computer prom VIN: 1G2FW23F3M I am sorry guys for not closing with a fix sooner,you were right,the ecm that i got from the auto parts was bad too,so i when ahead and got another one and it works perfect,am so sorry again for closing this fix sooner.Thanks alot for all your help. |
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| 2000 Pontiac Grand Prix GT 3.8L theft system VIN: 1G2WP52KXY Thanks for all the replies, I was wrong on the update, this car has the Pass Key 3 system. There is no resistor chip in the key though, it has a transponder under the black cover on the top of the key and the key also has PK3 stamped on it. I am still not 100%... |
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| 2001 Pontiac Montana 3.4L heater VIN: 1GMDX03E21 Customer called us back and said since we flushed system including both heater cores, van has had good heat. Thanks for all the replies. |
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| 2002 Pontiac Grand Am SE 3.4L Turn Signal Relay VIN: 1G2NF52E72 Thanks to all who replied, and sorry for starting my post with "Gentlemen" when I should have know that we also have ladies in our fine organization. So the replies were just about evenly split, it was either the emergency flasher switch/relay assembly or else... |
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