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Professional Automotive Repair Technical Discussions for January 31, 2008 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1999 Cadillac DeVille 4.6L alternator VIN: 1G6KD54Y7X cust. replaced alternator w/ used unit(dumba##) replaced w/ rebuilt unit, still wouldn't charge. I checked and found no power to "L" wire @ alt.I know power to "L" wire comes from instrument cluster and checked @ cluster and found no power leaving cluster, all... |
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| 2000 Cadillac Seville SLS 4.6L Air bags VIN: 1G6KS54Y4Y After crash replaced all Air bag compnents with used parts. All codes gone except B0051 (Deployment Command) All my info says it's a "latched" code and cannot be cleared. Do I need to have this thing "reflashed" to clear this code, or is there something I'm d... |
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| 1996 Chevrolet Lumina 3.1L Shifter VIN: 2G1WL52M6T Hello to all, hope things are going well since the first of the year. This Lumina came in with the fairly common "inoperative gearshift lever" we found that the ball socket on the cable was broken/cracked. We replaced the cable and cleaned the old lubricant wh... |
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| 1998 Chevrolet Cavalier 2.2L MIL Lamp on VIN: 3G1JC5244W Hello all, I was wodering if any of you could help me to get some info regarding the EGR system on this vehicle. The code re-occurs Immediately. Tested with Vantage on road test, no activity on pintle feedback circuit (pin C ) or EGR control (pin A). On open ... Trouble codes: P0403 (EGR system) |
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| 2000 Chevrolet Monte Carlo SS 3.8L turn signals VIN: 2G1WX12K8Y I HAVE A 2000 MONTE CARLO THAT WHEN THE TURN SIG IS ACTIVED YOU HERE A BUZZING SOUND FROM FLASHER UNIT AND NO LIGHT ON DASH. THE FLASHER UNIT AND SWITCH HAVE BEEN REPLACED. tHIS ALSO DISABLES THE TRAC AND ABS (MESSAGE APPEARS) ABS UNIT HAS BEEN UNPLUGGED. |
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| 2001 Chevrolet Blazer LS 4.3L Stall VIN: 1GNDT13W01 Hello from sunny Florida, A co-worker is going nuts trying to figure this one out. This vehicle stalls with almost no warning. It will very briefly stumble as fuel pressure drops below 50 psi and than immediately start right back up with no other driveability... |
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| 2002 Chevrolet Silverado 2500 6.0L transfer case VIN: 1GCHK29U22 Need some diagnosis assistance. I'm a Ford tech trying to fix a Chevy. No 4X4 engagement in transfer case. Indicator light on dash indicates 4wd (on solid, not flashing), front axle is engaging as I can turn front wheels and front driveshaft turns, releases in... |
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| 2005 Chevrolet Trailblazer LS 4.2L Stall VIN: 1GNET16S66 customer says rough runny all most dies at light witch would make sence with missfire and cam code Trouble codes: P0017, P0300 |
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| 2005 Chevrolet Suburban 2500 LS 6.0L No Crank VIN: 1GCHC23U15 Hello and thanks to all in advance. Background information as follows: No crank condition with no PNP/gear range indication at instrument cluster. When the key is released to the "off" position, parking lights/seat belt minder, and dash lights will remain ill... |
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| 2007 Chevrolet Tahoe LTZ 5.3L MIL Lamp on VIN: 1GNFK13087 HI chevrolet gurus, I need a little help. Im working on a 2007 tahoe that originally had a driveability problem when the tank got down to 1/4 tank, found fuel pump to be defective, replaced fuel pump assembly and sender did not come with fuel pump assembly. i ... Trouble codes: P0463 |
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| 1996 GMC Yukon SLE 5.7L Noise VIN: 1GKEK13R6T Vehicle towed in to us , low fuel pressure and noisey pump. Replaced pump and filter but truck has weird vibration type noise from tank area when pump stops running. Lasts until fuel pressure drops off 5-10 secs. If we key back up (run pump) noise imediately s... |
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| 1997 GMC Yukon SL 5.7L Hesitation, Misfire VIN: 1GNEK13RGV several shops have looked at vehicle, hence all the changed parts. When vehicle is cold it runs great, after it warms up it will lose power and run rough, if you stay in the throttle it will back fire in the intake and smother down and die. When you cycle the ... Trouble codes: P0131 (voltage low bank 1 sensor 1), P0137 (voltage low bank 1 sensor 2), P0133 (slow responce bank 1 sensor 1), P0134 (slow responce bank 1 sensor 2), P0300 (misfire detected) |
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| 2001 Oldsmobile Alero GL 2.4L ABS Light Flashes On Intermittently VIN: 1G3NL52T71 Vehicle came in Monday for an oil change, brake noises and inspection. We drove vehicle and noted that both ABS light and Traction Off light was on. Sold diagnstics. Found fault codes C1222 RF wheel speed sensor fault and C1226 RF wheel speed sensor signal fau... |
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| 1997 Pontiac Bonneville SE 3.8L Drivers Information Center VIN: 1G2HZ52KOV Thank you in advance for any advise. We have this Bonneville that has a DIC.If you let the vehicle idle for about 45 seconds the "check gauges" light will illimunate and the engine icon on the graph will light. (not the MIL) All the gauges read normal and are... |
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| 1999 Pontiac Grand Prix GTP 3.8L Transmittion VIN: 1G2WR5216X Chech engine light on |
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| 2003 Saturn Vue 3.0L alternator VIN: 5GZCZ63B73 hi: i have a wierd problem here,if you sit at idle the charging system voltage is good 14.3 volts if you drive the vehicle down the road at approx.45-50 mph lights dim and all accesorrys slow down (heater fan etc.) and charging system voltage is 12.4 volts com... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1993 Cadillac DeVille 4.9L electrical systems VIN: 1G6CD53B7P Thank you for all the input and suggestions. The actual cause of the problem was the body control module. When I dropped the cover and removed the glove box, I found an aftermarket alarm wired into the harness. The customer did not even know it was there. ... |
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| 1993 Chevrolet Lumina Z34 3.4L Excessive Emissions VIN: 2G1WP14X4P This vehicle is fixed. I can't say it's perfect but it did pass state inspection with a Nox reading of 753 PPM with a cut point of 870 PPM. I checked for exhaust leaks upstream of the cat but found none. Not even with the smoke machine with the system ice cold... |
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| 2000 Chevrolet Blazer LS 4.3L Differential Engagement VIN: 1GNDT13W8Y The final fix was an intermittent vacuum switch. When the transfer case is engaged in 4wd mode, an arm activates a mechanical vacuum switch on top of the transfer case. This switch provides the vacuum to the front differential servo motor. Now and then (~every... |
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| 1996 Geo Prizm LSi 1.6L MIL Lamp on VIN: 1Y1SK5266T Only recieved 3 replies on this but one hit the nail on the head. Special thanks to Stephen [...] who pointed me to TSB #81-65-43. This bulliten was hidden in the service manual updates section on MOD. Problem was a sticking EFI relay. Installed new one and... Trouble codes: P1300 (icm circuit). |
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| 1983 Oldsmobile Cutlass Supreme Brougham 5.7L wait light VIN: 1G3AM69N3D Thanks for all the wonderful information. It is spot on to how the system works. I found unplugging the engine running signal from the alternator turns out the light. So I am suspecting problems with the new alternator. I will try putting in a diode. But with ... |
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| 1999 Oldsmobile Silhouette Premiere 3.4L fans VIN: 1GHDX.3EXX This vehicle was ,as many of my automotive comrades pointed out,not broken.Dan from Texas suggested that she leave the ac on if she didnt want that pesky guage to cause her any mental anguish.Bam!Thats it,I could prove to her that nothing is wrong with her van... |
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| 2000 Pontiac Grand Prix GT 3.8L Ignition/Shiftlock VIN: 1G2WP52K9Y Got this one nailed down boys-after careful inspection of wiring at the shifter and verifying a 12 volt feed to the switch[@ shifter]we determined that said 12 volts was not passing through the switch back to the column.Replaced shifter assembly[pricey] and al... |
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| 2003 Pontiac Bonneville SE 3.8L Poor Idle Quality, Hesitation, Surge, Cuts out VIN: 1G2HX52K83 WELL THIS ONE IS FINAALY FIXED I HAD A FEW REPLIES BUT IT STILL CAME DOWN TO WHAT WAS (CHANGING THE PCM'S MIND). I SCOPED EVERYTHING AND DID NOT SEE THE PROBLEM SO WE WENT BACK TO THE DATA STREEM AND WATCHED 3 DATA PARAMETERS AT A TIME WHEN IT WOULD ACT UP, WA... |
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| 2005 Pontiac Vibe 1.8L MIL Lamp on VIN: 5Y2SL63885 Installed new upstream wide-band O2 sensor, vehicle came back in 1 week w/same lean code. Double checked fuel psi (spec 44-50, actual never lower than 47), smoke checked the intake, no leaks found, freeze frame this time showed the code at idle with engine @ ... Trouble codes: P0171 (System too lean). |
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| 2004 Saturn Vue Red Line 3.5L Misfire, MIL Lamp on VIN: 5GZCZ63414 thanks to all that replied to my request on the 04 saturn vue I went back to checking all the grounds for pcm. and i found one that was corroded. it is located just below the starter. i unbolted it from engine block and cleaned both the eyelet & mounting poi... Trouble codes: 300 (random misfire). |
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